Picture Naming Accuracy Research Articles

Microstructural properties in subacute aphasia: concurrent and prospective relationships underpinning recovery.

Few investigations examined the relationship between microstructural white matter integrity and subacute post-stroke linguistic performance or the relationship between microstructural integrity and the recovery of language function. We examined two key questions: (1) How does subacute language performance, measured in single words and discourse, relate to the microstructural integrity of key white matter regions of interest in the language network? and (2) Does the integrity of these regions before treatment predict the improvement or resolution of linguistic symptoms immediately and chronically following treatment? 58 participants within the first three months of stroke were enrolled in a randomized, single-center, double-blind, sham-controlled, study of anodal transcranial direct current stimulation combined with a computer-delivered speech and language naming therapy for subacute aphasia and were asked to complete magnetic resonance imaging at enrollment. Microstructural integrity was evaluated using diffusion tensor imaging processed with atlas-based segmentation. Regression and correlation analyses were conducted. A subset of 22 participants received diffusion tensor imaging. Picture naming accuracy significantly correlated with lower mean diffusivity (higher microstructural integrity) in the left posterior inferior temporal gyrus. Recovery of naming performance was predicted by days since stroke and baseline microstructural integrity of the left posterior middle temporal gyrus, arcuate fasciculus, and superior longitudinal fasciculus. Recovery of discourse efficiency was significantly predicted by the same model. This study demonstrates an association between picture naming and discourse and microstructural integrity of the key regions in the language network for patients with subacute post-stroke aphasia. Baseline microstructural integrity significantly predicts language recovery.

Neuromodulation of the Right Motor Cortex of the Lips With Repetitive Transcranial Magnetic Stimulation to Reduce Phonological Impairment and Improve Naming in Three Persons With Aphasia: A Single-Case Experimental Design.

Repetitive transcranial magnetic stimulation (rTMS) can enhance aphasia recovery. Most studies have used inhibitory stimulation targeting the right inferior frontal gyrus. However, the motor cortex, observed to contribute to the prediction of aphasia recovery, is involved in word production and could be an appropriate target for rTMS. We aimed to observe behavioral changes in a picture naming task induced by inhibitory rTMS targeting the right motor cortex of the lips in people with poststroke aphasia. Using a single-case experimental design, we included three participants with chronic poststroke aphasia who had phonological deficits. Each participant performed a verbal picture naming task 3 times a week for 2, 3, or 4 weeks (pseudorandom across participants) to establish a baseline naming ability for each participant. These were not therapy sessions, and no feedback was provided. Then, each participant received the intervention, inhibitory continuous theta burst stimulation targeting the right motor cortex of the lips, 3 times a week for 2 weeks. Naming testing continued 3 times a week, for these latter 2 weeks. No therapy was performed at any time during the study. Visual analysis of the graphs showed a positive effect of rTMS for P2 and P3 on picture naming accuracy and a tendency toward improvement for P1. Statistical analysis showed an improvement after rTMS for P1 (τ = 0.544, p = .013, SETau = 0.288) and P2 (τ = 0.708, p = .001, SETau = 0.235). For P3, even if the intervention allowed some improvement, this was statistically nonsignificant due to a learning effect during the baseline naming testing, which lasted the longest, 4 weeks. Regarding specific language features, phonological errors significantly decreased in all patients. The motor cortex of the lips could be an appropriate target for rTMS to improve naming in people with poststroke aphasia suffering from a phonological deficit. This suggests the possibility to individualize the target for rTMS, according to the patient's linguistic impairment.

Phonetic and Phono-Lexical Accuracy of Non-Native Tone Production by English-L1 and Mandarin-L1 Speakers.

Lexical tones are known to be a challenging aspect of speech to acquire in a second language, but several factors are known to affect tone learning facility, such as L1 tonal status (whether a learner's L1 is tonal or not), tone type (the shape of the tones to be acquired), and individual extralinguistic factors (such as musicianship, pitch aptitude, and working memory). Crucially, most of our knowledge of the effect of these factors is based on evidence from perception. The production side of tone learning and the origins of individual variability in learning facility remain relatively understudied. To this end, this study investigated non-native tone production-both in terms of phonetic accuracy in a pseudoword imitation task and in terms of phono-lexical accuracy in a picture-naming task-by English-L1 and Mandarin-L1 speakers. Results show that L1 tonal status and tone type dynamically affected both imitation and picture-naming accuracy, as there were specific accuracy patterns for the English and Mandarin groups. Production accuracy was further facilitated by individual musical experience, working memory, and pitch aptitude. This study's findings add to the currently limited literature on how both language-specific and individual extralinguistic factors modulate non-native tone processing in the speaking modality.

Evaluation of rTMS in patients with poststroke aphasia: a systematic review and focused meta-analysis.

Aphasia-acquired loss of the ability to understand or express language-is a common and debilitating neurological consequence of stroke. Evidence suggests that transcranial magnetic stimulation (TMS) can significantly improve language outcomes in patients with aphasia. Repetitive transcranial magnetic stimulation (rTMS) has been reported to improve naming in chronic stroke patients with nonfluent aphasia since 2005. We conducted a systematic review and meta-analyses of TMS treatment studies in patients with aphasia. Eight electronic databases (PubMed, Medline, Embase, Scopus, ScienceDirect, Cochrane Central Register of Controlled Trials, Journals@Ovid, and clinicaltrials.gov) were searched for articles. Relevant studies were further evaluated, and studies that met inclusion criteria were reviewed. The searches were limited to human studies written in English and published between January 1960 and January 2020. In keeping with the main objective of this review, we included all studies that carried out treatment using rTMS in stroke patients with aphasia, regardless of the trial (or experimental) design of the study. Studies that implemented between-subject or randomized controlled (RCT) design, cross-over trials, and within-subject or pre-post trials were all included. Standard mean difference (SMD) for changes in picture naming accuracy was estimated. The literature search yielded 423 studies. Fifty articles were further evaluated to be included. Eleven met all inclusion criteria and were chosen for review. Eleven eligible studies involving 242 stroke patients were identified in this meta-analysis. Further analyses demonstrated prominent effects for the naming subtest (SMD = 1.26, 95% CI = 0.80 to 1.71, p = 0.01), with heterogeneity (I2 = 69.101%). The meta-analysis continued to show that there was a statistically significant effect of rTMS compared with sham rTMS on the severity of aphasia. None of the patients from the 11 included articles reported adverse effects from rTMS. There are some strong studies evaluating the efficacy of rTMS in stroke patients but further research is required to fully establish the usefulness of this treatment. This meta-analysis indicates a clinically positive effect of rTMS with or without speech and language therapy (SLT) for patients with aphasia following stroke in overall language function and expressive language, including naming, repetition, writing, and comprehension. Low-frequency (1Hz) rTMS over the unaffected hemisphere is effective and compatible with the concept of interhemispheric inhibition. Moreover, the treatment of 1Hz rTMS for patients with aphasia after stroke was safe.

Facilitating Word Retrieval in Aphasia: Which Type of Cues for Which Aphasic Speakers?

Background: Even if both phonological and semantic cues can facilitate word retrieval in aphasia, it remains unclear if their respective effectiveness varies according to the underlying anomic profile.Aim: The aim of the present facilitation study is to compare the effect of phonological and semantic cues on picture naming accuracy and speed in different types of anomia.Methods: In the present within-subject design study, 15 aphasic persons following brain damage underwent picture naming paradigms with semantic cues (categorically- or associatively related) and phonological cues (initial phoneme presented auditorily, visually or both).Results: At the group level, semantic cueing was as effective as phonological cueing to significantly speed up picture naming. However, while phonological cues were effective regardless of the anomic profile, semantic cueing effects varied depending on the type of anomia. Participants with mixed anomia showed facilitation after both semantic categorical and associative cues, but individuals with lexical-phonological anomia only after categorical cues. Crucially, semantic cues were ineffective for participants with lexical-semantic anomia. These disparities were confirmed by categorical semantic facilitation decreasing when semantic/omission errors prevailed in the anomic profile, but increasing alongside phonological errors.Conclusion: The effectiveness of phonological vs semantic cues seems related to the underlying anomic profile: phonological cues benefit any type of anomia, but semantic cues only lexical-phonological or mixed anomia.

A meta-analysis of the effects of repetitive transcranial magnetic stimulation on aphasia rehabilitation in stroke patients

Background & Objective: Aphasia—acquired loss of the ability to understand or express language—is a common and debilitating neurological consequence of stroke. Evidence suggests that transcranial magnetic stimulation (TMS) can significantly improve language outcomes in patients with aphasia. Repetitive transcranial magnetic stimulation (rTMS) has been reported to improve naming in chronic stroke patients with nonfluent aphasia since 2005. Methods: We conducted a systematic review and meta-analyses of TMS treatment studies in patients with aphasia. Eight electronic databases (PubMed, Medline, Embase, Scopus, ScienceDirect, Cochrane Central Register of Controlled Trials, Journals@ Ovid, and clinicaltrials.gov) were searched for articles. Relevant studies were further evaluated and studies that met inclusion criteria were reviewed. We included studies if were: randomized controlled blinded clinical trials, meta-analyses or crossover designs of rTMS alone or with speech therapy or any other therapy tested with rTMS. Standard mean difference (SMD) for changes in picture naming accuracy was estimated. Results: The literature search yielded 423 studies. Fifty articles were further evaluated to be included. Eleven met all inclusion criteria and were chosen for review. Eleven eligible studies involving 301 stroke patients were identified in this meta-analysis. Further analyses demonstrated prominent effects for the naming subtest (SMD = 1.26, 95% CI = 0.80 to 1.71, P=0.01), with heterogeneity (I2 = 69.101%). The meta-analysis continued to show that there was a statistically significant effect of rTMS compared with sham rTMS on the severity of aphasia. None of the patients from the 11 included articles reported adverse effects from rTMS. Conclusions: There are some strong studies evaluating the efficacy of rTMS in stroke patients but further research is required to fully establish the usefulness of this treatment. This meta-analysis indicates a clinically positive effect of rTMS with or without speech and language therapy (SLT) for patients with aphasia following stroke in overall language function and expressive language, including naming, repetition, writing, and comprehension. Low-frequency (1 Hz) rTMS over the unaffected hemisphere is effective and compatible with the concept of interhemispheric inhibition. Moreover, the treatment of 1 Hz rTMS for patients with aphasia after stroke was safe.

Performance on the graded naming test in a population‐based sample of 72‐year‐olds: Associations with life‐course predictors and β‐amyloid pathology

AbstractBackgroundWord‐finding difficulties are a common early feature of Alzheimer’s disease (AD) and may be detectable during the preclinical stage. However, the relationship between changes in naming ability and accumulation of β‐amyloid pathology is not fully understood, and questions remain about the role of factors such as sex and education.MethodParticipants in Insight 46, a sub‐study of the British 1946 birth cohort, completed baseline cognitive assessments and neuroimaging (combined MRI/18F‐Florbetapir‐PET) at age 69‐71. Follow‐up assessments are currently underway (mean interval 28.9 months, SD 2.1) and include an audio‐recorded version of the 30‐item Graded Naming Test (GNT), which was not administered at baseline. Preliminary interim analyses have been conducted based on 211 cognitively‐normal individuals with complete neuroimaging data (see Table 1 for characteristics). A multivariable regression model was used to investigate predictors of picture naming accuracy, where the outcome was GNT score (max. 30) and predictors were sex, age at follow‐up assessment, β‐amyloid status at baseline (positive / negative), APOE genotype (ε4 carrier/non‐carrier), and prospectively‐collected measures of childhood cognitive ability, education and socioeconomic position (based on occupation). Due to the negatively‐skewed distribution of GNT scores, bootstrapping was used to produce bias‐corrected and accelerated 95% confidence intervals from 2,000 replications.Results will be updated to include the full sample before the conference. We also plan to include data on naming latency extracted from the audio‐recordings, which may be a more sensitive measure of early changes than naming accuracy.ResultHigher childhood cognitive ability predicted higher GNT scores over 60 years later (Table 2, Figure 1). Men scored 0.9 points higher than women on average. Amyloid‐positive participants scored 1.2 points lower than amyloid‐negative participants on average. These effects were all significant at the 5% level and were mutually independent.ConclusionSubtle changes in naming accuracy associated with β‐amyloid pathology are detectable in cognitively‐normal individuals as early as age 72. Performance is additionally influenced by sex and general cognitive ability, so these factors should be accounted for where possible in future studies and clinical trials that seek to detect and track the emergence of naming deficits.

Quantifying the Interplay of Semantics and Phonology During Failures of Word Retrieval by People With Aphasia Using a Multiplex Lexical Network.

Investigating instances where lexical selection fails can lead to deeper insights into the cognitive machinery and architecture supporting successful word retrieval and speech production. In this paper, we used a multiplex lexical network approach that combines semantic and phonological similarities among words to model the structure of the mental lexicon. Network measures at different levels of analysis (degree, network distance, and closeness centrality) were used to investigate the influence of network structure on picture naming accuracy and errors by people with Anomic, Broca's, Conduction, and Wernicke's aphasia. Our results reveal that word retrieval is influenced by the multiplex lexical network structure in at least two ways-(a) the accuracy of production and error type on incorrect productions were influenced by the degree and closeness centrality of the target word, and (b) error type also varied in terms of network distance between the target word and produced error word. Taken together, the analyses demonstrate that network science techniques, particularly the use of the multiplex lexical network to simultaneously represent semantic and phonological relationships among words, reveal how the structure of the mental lexicon influences language processes beyond traditionally examined psycholinguistic variables. We propose a framework for how the multiplex lexical network approach allows for understanding the influence of mental lexicon structure on word retrieval processes, with an eye toward a better understanding of the nature of clinical impairments, like aphasia.

A cognitive psychometric model for assessment of picture naming abilities in aphasia.

Picture naming impairments are a typical feature of stroke-induced aphasia. Overall accuracy and rates of different error types are used to make inferences about the severity and nature of damage to the brain's language network. Currently available assessment tools for picture naming accuracy treat it as a unidimensional measure, while assessment tools for error types treat items homogenously, contrary to findings from psycholinguistic investigations of word production. We created and tested a new cognitive psychometric model for assessment of picture naming responses, using cognitive theory to specify latent processing decisions during the production of a naming attempt, and using item response theory to separate the effects of item difficulty and participant ability on these internal processing decisions. The model enables multidimensional assessment of latent picture naming abilities on a common scale, with a relatively large cohort for normative reference. We present the results of 4 experiments testing our interpretation of the model's parameters, as they apply to picture naming predictions, lexical properties of the items, statistical properties of the lexicon, and participants' scores on other tests. We also created a website for researchers and clinicians to analyze item-level data using our model, providing estimates of latent abilities and percentile scores, as well as credible intervals to help gauge the reliability of the estimated model parameters and identify meaningful changes. To the extent that the model is successful, the estimated parameter values may aid in treatment decisions and progress monitoring, or they may help elucidate the functional properties of brain networks. (PsycINFO Database Record

Time for a quick word? The striking benefits of training speed and accuracy of word retrieval in post-stroke aphasia.

One-third of stroke survivors experience deficits in word retrieval as a core characteristic of their aphasia, which is frustrating, socially limiting and disabling for their professional and everyday lives. The, as yet, undiscovered 'holy grail' of clinical practice is to establish a treatment that not only improves item naming, but also generalizes to patients' connected speech. Speech production in healthy participants is a remarkable feat of cognitive processing being both rapid (at least 120 words per minute) and accurate (∼one error per 1000 words). Accordingly, we tested the hypothesis that word-finding treatment will only be successful and generalize to connected speech if word retrieval is both accurate and quick. This study compared a novel combined speed- and accuracy-focused intervention-'repeated, increasingly-speeded production'-to standard accuracy-focused treatment. Both treatments were evaluated for naming, connected speech outcomes, and related to participants' neuropsychological and lesion profiles. Twenty participants with post-stroke chronic aphasia of varying severity and subtype took part in 12 computer-based treatment sessions over 6 weeks. Four carefully matched word sets were randomly allocated either to the speed- and accuracy-focused treatment, standard accuracy-only treatment, or untreated (two control sets). In the standard treatment, sound-based naming cues facilitated naming accuracy. The speed- and accuracy-focused treatment encouraged naming to become gradually quicker, aiming towards the naming time of age-matched controls. The novel treatment was significantly more effective in improving and maintaining picture naming accuracy and speed (reduced latencies). Generalization of treated vocabulary to connected speech was significantly increased for all items relative to the baseline. The speed- and accuracy-focused treatment generated substantial and significantly greater deployment of targeted items in connected speech. These gains were maintained at 1-month post-intervention. There was a significant negative correlation for the speed- and accuracy-focused treatment between the patients' phonological scores and the magnitude of the therapy effect, which may have reflected the fact that the substantial beneficial effect of the novel treatment generated a ceiling effect in the milder patients. Maintenance of the speed- and accuracy-treatment effect correlated positively with executive skills. The neural correlate analyses revealed that participants with the greatest damage to the posterior superior temporal gyrus extending into the white matter of the inferior longitudinal fasciculus, showed the greatest speed- and accuracy treatment benefit. The novel treatment was well tolerated by participants across the range of severity and aphasia subtype, indicating that this type of intervention has considerable clinical utility and broad applicability.

Competitive lexical selection and multiword speech

Competitive lexical selection and multiword speech

Age-Related Increases in Verbal Knowledge Are Not Associated With Word Finding Problems in the Cam-CAN Cohort: What You Know Won't Hurt You.

Objective: We tested the claim that age-related increases in knowledge interfere with word retrieval, leading to word finding failures. We did this by relating a measure of crystallized intelligence to tip-of-the-tongue (TOT) states and picture naming accuracy.Method: Participants were from a large (N = 708), cross-sectional (aged 18–88 years), population-based sample from the Cambridge Centre for Ageing and Neuroscience cohort (Cam-CAN; www.cam-can.com). They completed (a) the Spot-the-Word Test (STW), a measure of crystallized intelligence in which participants circled the real word in word/nonword pairs, (b) a TOT-inducing task, and (c) a picture naming task.Results: Age and STW independently predicted TOTs, with higher TOTs for older adults and for participants with lower STW scores. Tests of a moderator model examining interactions between STW and age indicated that STW was a significant negative predictor of TOTs in younger adults, but with increasing age, the effect size gradually approached zero. Results using picture naming accuracy replicated these findings.Discussion: These results do not support the hypothesis that lifelong knowledge acquisition leads to interference that causes an age-related increase in TOTs. Instead, crystallized intelligence supports successful word retrieval, although this relationship weakens across adulthood.

Phonological code retrieval during picture naming: Influence of consonant class

Investigations of the time course of various stages of lexical processing have indicated either early or late onset of brain activation for phonological code retrieval. The basis of the differential findings is unclear, but factors related to segmental phonology appear to be part of it. The purpose of the present study was to determine whether phonological encoding is influenced by consonant type. Undergraduate students were presented pictures of common and familiar objects to name. Each picture label had an initial liquid (/l/, /ɹ/) or a stop (/b/, /d/) consonant. Accuracy of picture naming was high and comparable for the two stimulus sets. However, words beginning with liquids elicited larger N2 ERP responses than did those with initial stops. Cluster permutation analysis indicated that the ERP responses elicited by words in the two stimulus sets differed between 293ms and 371ms post picture onset. These findings point to a late onset of phonological code retrieval. They have implications for segmental phonology and/or motor planning and execution of speech.

Promoting generalisation of naming therapy to connected speech through reducing naming speed

Event Abstract Back to Event Promoting generalisation of naming therapy to connected speech through reducing naming speed Christina Sotiropoulou1*, Paul Conroy1 and Matthew Lambon Ralph1 1 University of Manchester, Neuroscience and Aphasia Research Unit, United Kingdom Word-retrieval difficulties commonly occur in aphasia and are considered one of the most pervasive symptoms affecting everyday communication. While picture naming tasks have typically been used for assessing and treating word finding problems in clinical practice, there is a dearth of studies investigating the relationship between confrontation naming and connected speech tasks. This study investigated whether a newly-developed treatment targeting both speed and accuracy (‘repeated increasingly speeded presentation’ - RISP) in picture naming would be more effective for improving the use of the treated names in connected speech, than a standard therapy (‘standard presentation’ - SP) which targeted accuracy alone. Twenty participants with aphasia of varying degrees of severity and subtype took part in twelve therapy sessions over six weeks. In the baseline and post-treatment assessments (four and two sessions respectively), participants were asked to complete a composite picture description task and a picture naming task, the items of which were part of the composite pictures and constituted therapy targets. For the dependent variables of speed and accuracy in picture naming, we found that, compared to the standard therapy, RISP was significantly more effective in improving picture naming accuracy and in maintaining the reduced RTs in the long term. While this was expected for speed (i.e. quicker RTs because of the speed manipulation), it was not expected for accuracy (i.e. no speed-accuracy trade-off). As for the picture description task, the ‘carry over’ of the therapy items to connected speech was increased for all items relative to the baseline. RISP therapy, however, in comparison to the SP, led to significantly higher generalisation of targeted items to connected speech, with long term effects. This could be due to (a) the increased benefit of RISP therapy on picture naming accuracy and picture naming speed, (b) the greater cognitive demand of the RISP task, because RISP promoted greater sustained attention, vigilance and motivation. These findings suggest that a more demanding single-word therapy can improve chronic stroke participants’ retrieval of isolated words and can promote strong generalisation effects to the more linguistically and cognitively demanding task of producing connected speech. Keywords: speed of naming, word finding difficulties, Aphasia, generalisation, Connected speech, speed accuracy trade-off, naming therapy Conference: 54th Annual Academy of Aphasia Meeting, Llandudno, United Kingdom, 16 Oct - 18 Oct, 2016. Presentation Type: Platform Sessions Topic: Academy of Aphasia Citation: Sotiropoulou C, Conroy P and Lambon Ralph M (2016). Promoting generalisation of naming therapy to connected speech through reducing naming speed. Front. Psychol. Conference Abstract: 54th Annual Academy of Aphasia Meeting. doi: 10.3389/conf.fpsyg.2016.68.00057 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: 29 Apr 2016; Published Online: 15 Aug 2016. * Correspondence: Miss. Christina Sotiropoulou, University of Manchester, Neuroscience and Aphasia Research Unit, Manchester, United Kingdom, christinsot@yahoo.gr 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 Christina Sotiropoulou Paul Conroy Matthew Lambon Ralph Google Christina Sotiropoulou Paul Conroy Matthew Lambon Ralph Google Scholar Christina Sotiropoulou Paul Conroy Matthew Lambon Ralph PubMed Christina Sotiropoulou Paul Conroy Matthew Lambon Ralph 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.

Linguistic and Non-Linguistic Paired Associate Learning in Aphasia

Linguistic and Non-Linguistic Paired Associate Learning in Aphasia

Grammatical category mediates the bilingual disadvantage in word retrieval

Grammatical category mediates the bilingual disadvantage in word retrieval

Broca's area damage is necessary but not sufficient to induce after-effects of cathodal tDCS on the unaffected hemisphere in post-stroke aphasia.

The inter-individual variability of behavioral effects after tDCS applied to the unaffected right hemisphere in stroke may be related to factors such as the lesion location. We investigated the effect of left Broca's area (BA) damage on picture naming in aphasic patients after cathodal tDCS applied over the right BA. We conducted a study using pre-interventional diffusion and resting state functional MRI (rsfMRI) and two cross-over tDCS sessions (TYPE: sham and cathodal) over the right homologous BA in aphasic stroke patients with ischemic lesions involving the left BA (BA+) or other left brain areas (BA-). Picture naming accuracy was assessed after each session. Inter-hemispheric (IH) functional balance was investigated via rsfMRI connectivity maps using the right BA as a seed. Probabilistic tractography was used to study the integrity of language white matter pathways. tDCS had different effects on picture naming accuracy in BA+ and BA- patients (TYPE×GROUP interaction, F(1,19): 4.6, P: 0.04). All BA- patients except one did not respond to tDCS and demonstrated normal IH balance between the right and left BA when compared to healthy subjects. BA+ patients were improved by tDCS in 36% and had decreased level of functional IH balance. Improvement in picture naming after cathodal tDCS was associated with the integrity of the arcuate fasciculus in BA+ patients. Behavioral effects of cathodal tDCS on the unaffected right hemisphere differ depending on whether BA and the arcuate fasciculus are damaged. Therefore, IH imbalance could be a direct consequence of anatomical lesions.

Effects of Phonological Neighborhood Density on Accuracy of Picture Naming in Aphasia

Effects of Phonological Neighborhood Density on Accuracy of Picture Naming in Aphasia

Word Production Complexity and Picture-Naming Accuracy in Aphasia

Word Production Complexity and Picture-Naming Accuracy in Aphasia

Predictors for Picture Naming Accuracy in Persian Aphasics

Predictors for Picture Naming Accuracy in Persian Aphasics