Naturalistic Condition Research Articles

Characterizing the spatiotemporal features of functional connectivity across the white matter and gray matter during the naturalistic condition.

The naturalistic stimuli due to its ease of operability has attracted many researchers in recent years. However, the influence of the naturalistic stimuli for whole-brain functions compared with the resting state is still unclear. In this study, we clustered gray matter (GM) and white matter (WM) masks both at the ROI- and network-levels. Functional connectivity (FC) and inter-subject functional connectivity (ISFC) were calculated in GM, WM, and between GM and WM under the movie-watching and the resting-state conditions. Furthermore, intra-class correlation coefficients (ICC) of FC and ISFC were estimated on different runs of fMRI data to denote the reliability of them during the two conditions. In addition, static and dynamic connectivity indices were calculated with Pearson correlation coefficient to demonstrate the associations between the movie-watching and the resting-state. As the results, we found that the movie-watching significantly affected FC in whole-brain compared with the resting-state, but ISFC did not show significant connectivity induced by the naturalistic condition. ICC of FC and ISFC was generally higher during movie-watching compared with the resting-state, demonstrating that naturalistic stimuli could promote the reliability of connectivity. The associations between static and dynamic ISFC were weakly negative correlations in the naturalistic stimuli while there is no correlation between them under resting-state condition. Our findings confirmed that compared to resting-state condition, the connectivity indices under the naturalistic stimuli were more reliable and stable to investigate the normal functional activities of the human brain, and might promote the applications of FC in the cerebral dysfunction in various mental disorders.

Hierarchical Individual Naturalistic Functional Brain Networks with Group Consistency uncovered by a Two-Stage NAS-Volumetric Sparse DBN Framework.

The functional magnetic resonance imaging under naturalistic paradigm (NfMRI) showed great advantages in identifying complex and interactive functional brain networks (FBNs) because of its dynamics and multimodal information. In recent years, various deep learning models, such as deep convolutional autoencoder (DCAE), deep belief network (DBN), and volumetric sparse DBN (vsDBN), can obtain hierarchical FBNs and temporal features from fMRI data. Among them, the vsDBN model revealed a good capability in identifying hierarchical FBNs by modeling fMRI volume images. However, because of the high dimensionality of fMRI volumes and the diverse training parameters of deep learning methods, especially the network architecture that is the most critical parameter for uncovering the hierarchical organization of human brain function, researchers still face challenges in designing an appropriate deep learning framework with automatic network architecture optimization to model volumetric NfMRI. In addition, most of the existing deep learning models ignore the group-wise consistency and intersubject variation properties embedded in NfMRI volumes. To solve these problems, we proposed a two-stage neural architecture search (NAS) and vsDBN model (two-stage NAS-vsDBN model) to identify the hierarchical human brain spatiotemporal features possessing both group consistency and individual uniqueness under naturalistic condition. Moreover, our model defined reliable network structure for modeling volumetric NfMRI data via NAS framework, and the group-level and individual-level FBNs and associated temporal features exhibited great consistency. In general, our method well identified the hierarchical temporal and spatial features of the brain function and revealed the crucial properties of neural processes under natural viewing condition.

The anticholinergic burden is not associated with cognitive impairments in patients treated by electroconvulsive therapy for treatment-resistant depression

Electroconvulsive therapy (ECT) is the most effective non-pharmacological treatment for treatment-resistant depression (TRD) but can expose to transient cognitive impairments. Understanding factors underlying these cognitive side effects is important. This study investigated the impact of anticholinergic treatments on cognitive performances after ECT courses for TRD in naturalistic condition. Impact of anticholinergic burden (Anticholinergic Impregnation Scale, AIS) on cognitive changes (Montreal Cognitive Assessment, MoCA) adjusted on depression level (Montgomery and Asberg Depression Scale, MADRS) was investigated in 42 patients who received an ECT course between 2017 and 2020 for unipolar or bipolar TRD. Collection of daily treatments given during ECT was carried out via the computerized traceability of treatments validated by nurses. Among the 31 treatments identified with an anticholinergic score, which represent only 38% of total treatments, the three most frequently given treatments were Lorazepam (47%), Venlafaxine (36%) and Cyamemazine (26%). Delayed recall was the most frequently impaired cognitive function after ECT courses. Using logistic regression, we found no association between the anticholinergic burden and the decrease in cognitive scores after ECT courses, adjusted on MADRS score evolution (p>0.1). Conversely, improvement in MADRS scores were correlated with improvement in attention MoCA subscores. This is a retrospective monocentric study with a moderate sample size using anticholinergic scales to calculate the anticholinergic burden without plasma dosage. Anticholinergic treatments did not seem to explain ECT-related cognitive impairments. This warrants further large prospective investigations including different measures of anticholinergic burden.

Shared intentionality in children with Autism Spectrum Disorder (ASD)

It is well documented that the ability and motivation to engage with others in collaborative activities with joint goals and shared intentions is the foundation of human uniqueness. However, children with Autism Spectrum Disorder (ASD) show difficulties in sharing their motives, intentions, and emotions with others about topics in the environment and manifest low levels of engagement. The purpose of the present study was to compare the level of intentionality and social engagement in 10 children with ASD and 10 typically developing (TD) children, matched for mental age, during free play interactions with their mothers. Children were video recorded while playing with their mothers in a naturalistic condition with toys provided by the researcher. For the microanalysis of the video recordings the EUDICO Linguistic Annotator was used, which permits the analysis of joint behaviors and captures subtle qualitative differences in social engagement. Results indicated that children with ASD showed deficits in joint attention, exhibited no functional play and employed less communicative gestures than their peers in the comparison group. These differences between the two groups in their mode of communication led to the emergence of two distinct patterns of engagement which depict the different level of intentionality that these groups have in sharing their experiences during mother-child interactions. These representative patterns of interaction can be used as a potential tool for early identification of children at risk of ASD well before other behaviors become fully manifested.

Non-inferiority trial comparing cigarette consumption, adoption rates, acceptability, tolerability, and tobacco harm reduction potential in smokers switching to Heated Tobacco Products or electronic cigarettes: Study protocol for a randomized controlled trial

BackgroundDespite the introduction of tobacco control measures, smoking remains highly prevalent in most EU countries. In Italy, one in four adults were still regular smokers in 2017. Increasing use of combustion-free delivering nicotine technologies for cigarette substitution may accelerate the current downward trends in smoking prevalence. Whether Heated Tobacco Products (HTPs) are more effective tobacco smoking substitutes that may potentially facilitate adoption and full conversion compared to e-cigarettes (ECs) is not known.We have designed a prospective study to compare changes in cigarette consumption and adoption rates among smokers randomized to either HTPs or ECs. Product acceptability, tolerability, and their tobacco harm reduction potential will be also compared. Methods220 healthy smokers, not motivated to quit, will be randomized into a 12-weeks single-center, open label, non-inferiority trial comparing study outcomes from HTPs vs. ECs use. The primary outcome will be biochemically verified self-reported continuous abstinence at 12-weeks from the previous visit. Secondary outcomes will include: smoking reduction from baseline, adoption rates and product acceptability, tolerability, changes in step test values and in the level of selected biomarkers of exposure in exhaled breath (i.e. eCO) and in spot urine samples. A follow-up visit will be also included at 24-weeks to review product usage and smoking behavior under naturalistic condition of use.Recruitment of participants started in May 2019 and enrolment is expected to be completed in November 2019. DiscussionThis will be the first study directly comparing Heated Tobacco Products with Electronic Cigarettes in term of reduction in cigarette consumption, adoption rates, product acceptability, tolerability, and tobacco harm reduction potential. This knowledge can contribute to a better understanding of the potential role of this new technology in the evolving nicotine consumer market. Trial registrationClinicalTrials.gov ID: NCT03569748.Registered June 25, 2018.https://register.clinicaltrials.gov/prs/app/action/LoginUser?ts=1&cx=-jg9qo4.

Trait Emotional Intelligence, Self-Reported Affect, and Salivary Alpha-Amylase on Working Days and a Non-Working Day

This study examined the relationship between trait emotional intelligence (EI) and variation in psychological (positive affect: PA, negative affect: NA) and psychophysiological (salivary alpha-amylase: sAA) indicators among Japanese employees over 3 consecutive days (working day 1, non-working day, working day 2). The analyses revealed that higher trait EI was associated across the days with higher PA, but not with NA. Moreover, diurnal sAA levels were lower in the high trait EI group than in the low trait EI group on the intervening non-working day, and this difference between the EI groups continued to show a tendency to significance on working day 2. The results indicate that higher EI may be related to the preservation of higher levels of PA and lower levels of sympathetic activity in recovery in the naturalistic condition.

Mind-wandering and alterations to default mode network connectivity when listening to naturalistic versus artificial sounds

Naturalistic environments have been demonstrated to promote relaxation and wellbeing. We assess opposing theoretical accounts for these effects through investigation of autonomic arousal and alterations of activation and functional connectivity within the default mode network (DMN) of the brain while participants listened to sounds from artificial and natural environments. We found no evidence for increased DMN activity in the naturalistic compared to artificial or control condition, however, seed based functional connectivity showed a shift from anterior to posterior midline functional coupling in the naturalistic condition. These changes were accompanied by an increase in peak high frequency heart rate variability, indicating an increase in parasympathetic activity in the naturalistic condition in line with the Stress Recovery Theory of nature exposure. Changes in heart rate and the peak high frequency were correlated with baseline functional connectivity within the DMN and baseline parasympathetic tone respectively, highlighting the importance of individual neural and autonomic differences in the response to nature exposure. Our findings may help explain reported health benefits of exposure to natural environments, through identification of alterations to autonomic activity and functional coupling within the DMN when listening to naturalistic sounds.

High relapse rate and poor medication adherence in the Chinese population with schizophrenia: results from an observational survey in the People's Republic of China.

BackgroundRelapse is common in schizophrenia, and seriously impacts patients’ quality of life and social functioning. Many factors have been identified that may potentially increase the risk of relapse. This study was designed to investigate the relapse rate in the year following hospital discharge among Chinese patients with schizophrenia in the naturalistic condition, and to explore possible risk factors related to relapse.MethodsWe conducted a large, multicenter, retrospective, observational study in ten psychiatric hospitals throughout the People’s Republic of China. Nine hundred and ninety-two schizophrenic outpatients aged 18–65 years discharged from these hospitals between September 2011 and February 2012 with recovery/improvement of their condition were included in the study. Information about relapse and correlative factors during the year after discharge was collected by telephone interview using a questionnaire.ResultsEight hundred and seventy-six of 992 eligible patients completed the telephone survey. Of these patients, 293 (33.4%) had at least one relapse within 1 year after discharge, and 165 (18.8%) were rehospitalized. In respondents’ view, the most important factor contributing to relapse was poor medication adherence (50.7%). Approximately 30% of the respondents had a negative attitude toward medication, with the impression that there was no need to take drugs at all or for a long time. Nonadherent patients (37.9%) had a relapse rate that was 2.5-fold higher than adherent patients (54.5% versus 20.7%, P<0.001). The top five risk factors associated with relapse were nonadherence to medication (odds ratio [OR] 4.602, 95% confidence interval [CI] 3.410–6.211), being without work (OR 3.275, 95% CI 2.291–4.681), poor self-care ability (OR 2.996, 95% CI 2.129–4.214), poor interpersonal skills (OR 2.635, 95% CI 1.951–3.558), and hospitalization on more than three occasions (OR 2.299, 95% CI 1.691–3.126).ConclusionThe 1-year relapse rate after discharge in patients with schizophrenia was 33.5% in our study. The most important risk factor related to relapse was poor medication adherence, which was mainly due to patients having a negative attitude toward their medication. Lack of psychosocial support and a complicated disease history also increased the risk of relapse.

Intelligent Street Lights

In today's world, more amount of electricity is consumed due to street lights. This is due to continuous operation of lighting during the night time. In order to reduce the electricity consumption and wastage of energy, the system that has to combine the existing network with intelligence to think itself. This newly developed concept will enable the street lights to adjust automatically based on the real time traffic conditions and change according to naturalistic condition (Full moon). This paper is concerned with the development and implementation of Low cost Sensor based Street Lights with dynamic which in turn reduces the energy consumption and CO 2 emission. It consists of IR sensor, PIR sensors, low cost embedded controller and storage device.

Auditory observation of infant-directed speech by mothers: experience-dependent interaction between language and emotion in the basal ganglia.

Adults address infants with a special speech register known as infant-directed speech (IDS), which conveys both linguistic and emotional information through its characteristic lexicon and exaggerated prosody (e.g., higher pitched, slower, and hyperarticulated). Although caregivers are known to regulate the usage of IDS (linguistic and emotional components) depending on their child’s development, the underlying neural substrates of this flexible modification are largely unknown. Here, using an auditory observation method and functional magnetic resonance imaging (fMRI) of four different groups of females, we revealed the experience-dependent influence of the emotional component on linguistic processing in the right caudate nucleus when mothers process IDS: (1) non-mothers, who do not use IDS regularly, showed no significant difference between IDS and adult-directed speech (ADS); (2) mothers with preverbal infants, who primarily use the emotional component of IDS, showed the main effect of the emotional component of IDS; (3) mothers with toddlers at the two-word stage, who use both linguistic and emotional components of IDS, showed an interaction between the linguistic and emotional components of IDS; and (4) mothers with school-age children, who use ADS rather than IDS toward their children, showed a tendency toward the main effect of ADS. The task that was most comparable to the naturalistic categories of IDS (i.e., explicit-language and implicit-emotion processing) recruited the right caudate nucleus, but it was not recruited in the control, less naturalistic condition (explicit-emotion and implicit-language processing). Our results indicate that the right caudate nucleus processes experience-and task-dependent interactions between language and emotion in mothers’ IDS.

Dynamics of brain activity underlying working memory for music in a naturalistic condition

We aimed at determining the functional neuroanatomy of working memory (WM) recognition of musical motifs that occurs while listening to music by adopting a non-standard procedure. Western tonal music provides naturally occurring repetition and variation of motifs. These serve as WM triggers, thus allowing us to study the phenomenon of motif tracking within real music. Adopting a modern tango as stimulus, a behavioural test helped to identify the stimulus motifs and build a time-course regressor of WM neural responses. This regressor was then correlated with the participants' (musicians') functional magnetic resonance imaging (fMRI) signal obtained during a continuous listening condition. In order to fine-tune the identification of WM processes in the brain, the variance accounted for by the sensory processing of a set of the stimulus' acoustic features was pruned from participants' neurovascular responses to music. Motivic repetitions activated prefrontal and motor cortical areas, basal ganglia, medial temporal lobe (MTL) structures, and cerebellum. The findings suggest that WM processing of motifs while listening to music emerges from the integration of neural activity distributed over cognitive, motor and limbic subsystems. The recruitment of the hippocampus stands as a novel finding in auditory WM. Effective connectivity and agglomerative hierarchical clustering analyses indicate that the hippocampal connectivity is modulated by motif repetitions, showing strong connections with WM-relevant areas (dorsolateral prefrontal cortex – dlPFC, supplementary motor area – SMA, and cerebellum), which supports the role of the hippocampus in the encoding of the musical motifs in WM, and may evidence long-term memory (LTM) formation, enabled by the use of a realistic listening condition.

DYNAMICS OF BRAIN ACTIVITY UNDERLYING WORKING MEMORY FOR MUSIC IN A NATURALISTIC CONDITION

Event Abstract Back to Event DYNAMICS OF BRAIN ACTIVITY UNDERLYING WORKING MEMORY FOR MUSIC IN A NATURALISTIC CONDITION Iballa Burunat1, 2*, Vinoo Alluri1, 2, Petri Toiviainen1 and Elvira Brattico1, 3, 4 1 University of Jyväskylä, Finnish Centre of Excellence in Interdisciplinary Music Research, Department of Music, Finland 2 University of Jyväskylä, Department of Mathematical Information Technology, Finland 3 University of Helsinki, Cognitive Brain Research Unit, Institute of Behavioural Sciences, Finland 4 Aalto University School of Science, Brain & Mind Lab, Department of Biomedical Engineering and Computational Science, Finland Despite working memory's (WM) critical role in high-level cognitive functions in the integration of information over time, its implementation in the neural tissue is poorly understood. Auditory WM has been mainly studied using vocal stimuli and only recently a few studies have started investigating the neural networks engaged in auditory WM for music. Moreover, in neuroscience WM has not been studied in naturalistic conditions but rather using artificial target detection tasks (e.g., n-back and Sternberg) and simpler, manipulated materials, all of which might create mental states not characteristic of brain’s behaviour in more natural, attentive situations. In music, WM allows us to form a coherent representation of the otherwise undifferentiated musical stream, and to emotionally respond to it, i.e., by tracking tonal, rhythmic and timbral dynamics. Our goal was to study the functional neuroanatomy of WM memory for musical motifs as it emerges in the brain while listening to music. We followed a naturalistic, non-standard procedure: a) participants’ (musicians) brain responses were recorded while attentively listening to a piece of music, instead of performing auditory cued tasks; b) we adopted a modern tango as stimulus, containing shifts in tempo, timbre, dynamics, tonality and rhythm, a complex stimulus more representative of the complex auditory scene environment our brains have evolved to respond to; c) we used a behavioural test to identify the stimulus motifs and build a time-course predictor of WM neural responses; d) activation of WM-related neural networks was studied by tracking in the neurovascular responses the temporal evolution of motivic repetition that naturally occurs in Western tonal music, assumed to trigger WM; and e) in order to fine-tune the identification of WM function in the brain, the variance accounted by a set of the stimulus’ acoustic features was pruned from participants’ brain responses. Correlational analysis revealed a distributed network of cortical and subcortical areas responding to motif repetitions, including a right lateralized dorsal area in the prefrontal cortex, bilateral basal ganglia, and left hippocampus. The findings suggest that WM encoding of motifs while listening to music emerges from the integration of neural activity spread out over cognitive, motor and limbic subsystems. The recruitment of the hippocampus stands as a novel finding in auditory WM. We hypothesize this activation to be enabled by the use of a realistic listening condition, which might evidence the formation of long-term memories for the music. Keywords: working memory, Music, naturalistic, functional magnetic resonance imaging (fMRI), dorsolateral prefrontal cortex, Hippocampus, segmentation, neuroinformatics Conference: Neuroinformatics 2013, Stockholm, Sweden, 27 Aug - 29 Aug, 2013. Presentation Type: Poster Topic: General neuroinformatics Citation: Burunat I, Alluri V, Toiviainen P and Brattico E (2013). DYNAMICS OF BRAIN ACTIVITY UNDERLYING WORKING MEMORY FOR MUSIC IN A NATURALISTIC CONDITION. Front. Neuroinform. Conference Abstract: Neuroinformatics 2013. doi: 10.3389/conf.fninf.2013.09.00005 Copyright: The abstracts in this collection have not been subject to any Frontiers peer review or checks, and are not endorsed by Frontiers. They are made available through the Frontiers publishing platform as a service to conference organizers and presenters. The copyright in the individual abstracts is owned by the author of each abstract or his/her employer unless otherwise stated. Each abstract, as well as the collection of abstracts, are published under a Creative Commons CC-BY 4.0 (attribution) licence (https://creativecommons.org/licenses/by/4.0/) and may thus be reproduced, translated, adapted and be the subject of derivative works provided the authors and Frontiers are attributed. For Frontiers’ terms and conditions please see https://www.frontiersin.org/legal/terms-and-conditions. Received: 20 May 2013; Published Online: 11 Jul 2013. * Correspondence: Ms. Iballa Burunat, University of Jyväskylä, Finnish Centre of Excellence in Interdisciplinary Music Research, Department of Music, Jyväskylän yliopisto, Finland, iballa.burunat@jyu.fi Login Required This action requires you to be registered with Frontiers and logged in. To register or login click here. Abstract Info Abstract The Authors in Frontiers Iballa Burunat Vinoo Alluri Petri Toiviainen Elvira Brattico Google Iballa Burunat Vinoo Alluri Petri Toiviainen Elvira Brattico Google Scholar Iballa Burunat Vinoo Alluri Petri Toiviainen Elvira Brattico PubMed Iballa Burunat Vinoo Alluri Petri Toiviainen Elvira Brattico Related Article in Frontiers Google Scholar PubMed Abstract Close Back to top Javascript is disabled. Please enable Javascript in your browser settings in order to see all the content on this page.

Developmental Changes in the Balance of Disparity, Blur, and Looming/Proximity Cues to Drive Ocular Alignment and Focus

Accurate coordination of accommodation and convergence is necessary to view near objects and develop fine motor coordination. We used a remote haploscopic videorefraction paradigm to measure longitudinal changes in simultaneous ocular accommodation and vergence to targets at different depths, and to all combinations of blur, binocular disparity, and change-in-size ('proximity') cues. Infants were followed longitudinally and compared with older children and young adults, with the prediction that sensitivity to different cues would change during development. Mean infant responses to the most naturalistic condition were similar to those of adults from 6-7 weeks (accommodation) and 8-9 weeks (vergence). Proximity cues influenced responses most in infants of less than 14 weeks of age, but sensitivity declined thereafter. Between 12 and 28 weeks of age infants were equally responsive to all three cues, while in older children and adults manipulation of disparity resulted in the greatest changes in response. Despite rapid development of visual acuity (thus increasing availability of blur cues), responses to blur were stable throughout development. Our results suggest that, during much of infancy, vergence and accommodation responses are not dependent on the development of specific depth cues, but make use of any cues available to drive appropriate changes in response.

Music and Emotions in the Brain: Familiarity Matters

The importance of music in our daily life has given rise to an increased number of studies addressing the brain regions involved in its appreciation. Some of these studies controlled only for the familiarity of the stimuli, while others relied on pleasantness ratings, and others still on musical preferences. With a listening test and a functional magnetic resonance imaging (fMRI) experiment, we wished to clarify the role of familiarity in the brain correlates of music appreciation by controlling, in the same study, for both familiarity and musical preferences. First, we conducted a listening test, in which participants rated the familiarity and liking of song excerpts from the pop/rock repertoire, allowing us to select a personalized set of stimuli per subject. Then, we used a passive listening paradigm in fMRI to study music appreciation in a naturalistic condition with increased ecological value. Brain activation data revealed that broad emotion-related limbic and paralimbic regions as well as the reward circuitry were significantly more active for familiar relative to unfamiliar music. Smaller regions in the cingulate cortex and frontal lobe, including the motor cortex and Broca's area, were found to be more active in response to liked music when compared to disliked one. Hence, familiarity seems to be a crucial factor in making the listeners emotionally engaged with music, as revealed by fMRI data.

Transcranial magnetic stimulation for the treatment of depression: feasibility and results under naturalistic conditions: a retrospective analysis

An increasing number of controlled studies strongly support an antidepressant effect of high-frequency repetitive transcranial magnetic stimulation (rTMS) over the left dorsolateral prefrontal cortex. However, these data come from highly selected study populations. Whether rTMS is a feasible therapeutic tool for the treatment of depression under naturalistic condition has not yet been addressed. Here, we report results from 232 depressive patients [aged 20-76years, baseline Hamilton Depression Rating Score (HDRS-21) 24.0±7.3] treated with rTMS add-on to continued psychopharmacological treatment in a naturalistic clinical setting. Two thousand stimuli of 20-Hz rTMS were applied daily over the left dorsolateral prefrontal cortex with an intensity of 110% of motor threshold. Treatment duration was individually planned and varied between 10 and 20 sessions. In average, patients received 13±6.1 rTMS sessions. In 90% of the cases, treatment was terminated regularly. No severe side effects were observed. Only four patients stopped rTMS treatment because of side effects. Ratings with the HDRS-21 before and after treatment were available in 130 patients. The average improvement of the HDRS-21 in this subsample was 9.0±9.2 points. Fifty-three patients had an improvement of 50% or more. These results document that rTMS is feasible, safe and well tolerated under naturalistic conditions.

P01-178 Bipolar disorder and suicide: 10 years follow-up /retrospective survey/

Introduction:Bipolar disorder (BD) is chronic psychiatric disorder by mood swings, symptoms of BD are serious and life-threating. Suicide risk in patients with BD is 25-50%, more frequent during depressive episode (Compton,2000) but with adequate treatment suicide risk can be presented in nearby 50% of patients only (Goodwin, Jamison,2006). Despite these facts data about the changes of treatment habits over the longer period of time under naturalistic condition are lacking.The aim of study:To assess presence of suicidal thoughts and attempts in inpatients with BD and follow-up changes of treatment with lithium over the period of time.Patients and methods:It was retrospective survey of in-patient's files hospitalized at the 1st Dept. of Psychiatry, UPJS, Kosice (1997-2007) with typical limitations for retrospective case survey. All patients had diagnosis of BD (DSM-IV), n=125 (67% of women and 33% of men). We discovered changes in suicidal behaviour with/without treatment of lithium.Results:The first episode was depressive in 62% of patients, average number of episodes: 8,2. There was trend of decrease in use of lithium over the time (68% vs 84% in men, 29% vs 60% in women). The suicidal thoughts were more frequent during depressive episode (in 50% of women and 18% of men). Suicidal thoughts and attempts were 3 times more frequent in women vs men with BD. Suicidal attempts were 4 times more frequent in women with treatment with lithium vs without lithium.

PW05-05 Bipolar disorder and suicide: 10 years follow-up/retrospective survey/

Introduction:Bipolar disorder (BD) is chronic psychiatric disorder by mood swings, symptoms of BD are serious and life-threating. Suicide risk in patients with BD is 25-50%, more frequent during depressive episode (Compton,2000) but with adequate treatment suicide risk can be presented in nearby 50% of patients only (Goodwin, Jamison,2006). Despite these facts data about the changes of treatment habits over the longer period of time under naturalistic condition are lacking.The aim of study:To assess presence of suicidal thoughts and attempts in inpatients with BD and follow-up changes of treatment with lithium over the period of time.Patients and methods:It was retrospective survey of in-patient's files hospitalized at the 1st Dept. of Psychiatry, UPJS, Kosice (1997-2007) with typical limitations for retrospective case survey. All patients had diagnosis of BD (DSM-IV), n=125 (67% of women and 33% of men). We discovered changes in suicidal behaviour with/without treatment of lithium.Results:The first episode was depressive in 62% of patients, average number of episodes: 8,2. There was trend of decrease in use of lithium over the time (68% vs 84% in men, 29% vs 60% in women). The suicidal thoughts were more frequent during depressive episode (in 50% of women and 18% of men). Suicidal thoughts and attempts were 3 times more frequent in women vs men with BD. Suicidal attempts were 4 times more frequent in women with treatment with lithium vs without lithium.

The role of the vertical meridian in visual memory for objects

It is widely believed that, in human and nonhuman primates, visual memories of objects are stored in the temporal lobe. Electrophysiological results in monkeys, however, indicate that when a visual scene contains two or more objects, with at least one object in each visual hemifield, neurons in the temporal lobe of each hemisphere respond only to the objects that are in the contralateral visual hemifield, and their activity is unaffected by the objects in the ipsilateral hemifield. Putting these two premises together predicts that object memory should fail, or at least suffer a substantial decrement, when an object is presented for learning and retention as part of such a scene, but crosses the vertical meridian between the learning trial and the retention test. The effect of this change should be much greater than the effect of an equal retinal translation that crosses the horizontal rather than the vertical meridian. An experiment with normal human subjects verified this prediction under conventional conditions of tachistoscopic viewing, with a single constant fixation spot. A further condition in the same experiment, however, tested the same retinal translations in a more naturalistic condition, where the retinal changes were produced by varying the position on the display screen of the fixation spot rather than of the objects. Here, there was no significant special effect of crossing the vertical meridian. We conclude that visual memories are not stored exclusively in the temporal lobe.

SLEEP AND CIRCADIAN PHASE CHARACTERISTICS OF ADOLESCENT AND YOUNG ADULT MALES IN A NATURALISTIC SUMMERTIME CONDITION

Our aim was to compare the circadian phase characteristics of healthy adolescent and young adult males in a naturalistic summertime condition. A total of 19 adolescents (mean age 15.7 years) and 18 young adults (mean age 24.5 years) with no sleep problems took part in this study. Two-night polysomnographic (PSG) sleep recordings and 24h secretion patterns of urinary 6-sulfatoxymelatonin were monitored in all 37 subjects. Sleep-wake patterns were initially assessed at home using a standard sleep diary. Circadian assessment included the measure of dim light melatonin offset (DLMOff) and the morningness-eveningness (M/E) questionnaire. As expected, compared to young adults, adolescents habitually spent more nocturnal time in bed and spent more time (and percentage) in delta sleep. No difference was found between adolescents and young adults on multiple sleep latency test (MSLT) sleep onset latencies, M/E, melatonin secretion measures (24h total, nighttime, daytime, and night ratio), and DLMOff. For the subjects as a whole, correlational analyses revealed a significant association between the DLMOff and M/E and between both these phase markers and habitual bedtimes, habitual rising times, and melatonin secretion measures (daytime levels and the night ratio). No association was found between phase markers and daytime sleepiness or sleep consolidation parameters such as sleep efficiency or number of microarousals. These results together indicate that adolescents and young adults investigated during summertime showed similar circadian phase characteristics, and that, in these age groups, an evening phase preference is associated with a delayed melatonin secretion pattern and delayed habitual sleep patterns without a decrease in sleep consolidation or vigilance. (Chronobiology International, 17(4), 489–501, 2000)

Illusion of Control: Detecting Response-Outcome Independence in Analytic but Not in Naturalistic Conditions

Experiments in which subjects are asked to analytically assess response-outcome relationships have frequently yielded accurate judgments of response-outcome independence, but more naturalistically set experiments in which subjects are instructed to obtain the outcome have frequently yielded illusions of control The present research tested the hypothesis that a differential probability of responding p(R), between these two traditions could be at the basis of these different results Subjects received response-independent outcomes and were instructed either to obtain the outcome (naturalistic condition) or to behave scientifically in order to find out how much control over the outcome was possible (analytic condition) Subjects in the naturalistic condition tended to respond at almost every opportunity and developed a strong illusion of control Subjects in the analytic condition maintained their p(R) at a point close to 5 and made accurate judgments of control The illusion of control observed in the naturalistic condition appears to be a collateral effect of a high tendency to respond in subjects who are trying to obtain an outcome, this tendency to respond prevents them from learning that the outcome would have occurred with the same probability if they had not responded