Hand Coordination Research Articles

A Comparison of Expert Ratings and Marker-Less Hand Tracking Along OSATS-Derived Motion Scales

Objective: This study creates linear and generalized additive models (GAMs) of video-recorded two-dimensional hand motion (synonymously referred to as hand movements or hand kinematics) to predict expert-rated performance along a series of surgical motion scales. Background: Surgical performance assessments are costly and time consuming. Automatically quantifying hand motion may offload some burden of surgical coaching and intervention by automatically collecting features of psychomotor performance. Methods: Five experts rated anonymized video clips of benchtop suturing and tying tasks (n = 219) along four visual-analog (0-10) performance scales: fluidity of motion, motion economy, tissue handling, and hand coordination. Custom software tracked both participant hands across successive video frames and populated a robust feature set to train a series of predictive models to reproduce the expert ratings. Results: A GAM (which accounts for nonlinear effects) predicted fluidity of motion ratings with slope = 0.71, intercept = 1.98, and R <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> = 0.77 for clinicians of different experience levels. Fluidity of motion and motion economy models outperformed those created to predict hand coordination and tissue handling ratings. Conclusions: Hand motion tracking may not address all contextual features of surgical tasks. Future work will explore how well simulation-based models extrapolate to more dynamic settings of the operating room.

Enacting Gustatory Pleasure on Behalf of Another: The Multimodal Coordination of Infant Tasting Practices

Tasting as a social practice can be enacted on behalf of others through precisely positioned nonlexical vocalizations as gustatory mmms. This paper uses multimodal interaction analysis to detail the coordination of parents and infants while starting to feed solid foods; data are from families in Scotland. The analysis focuses on the organization of parental mmms in relation to eye gaze, sequentiality, and the temporal coordination of hands, food, and mouths to demonstrate their use in beginning, continuing, and refocusing on taste. The paper proposes that in order to fully understand the sociality of tasting, infant feeding research should include real‐time vocal and embodied behavior, which is also key to the functional analysis of sensoriality‐related vocalizations at the margins of language.

Розвиток сенсорно-перцептивних процесів психіки в умовах норми та органічної патології (ДЦП)

Актуальність проблеми вивчення сенсорно-пер-цептивних процесів психіки зумовлена необхідні-стю пошуку шляхів стимулювання активності дітейу сучасних умовах буття, а також удосконалення діа-гностики та корекції цих процесів у дітей з особли-вими потребами, як первинних у структурі дефекту. Мета статті полягає в теоретичному вивченніта емпіричному дослідженні особливостей роз-витку сенсорно-перцептивних процесів психікив умовах норми та органічної патології (ДЦП). Наоснові розгляду онтогенетичного аспекту вивченнясенсорно-перцептивних процесів здійснено порів-няльний аналіз їхнього розвитку при органічномуураженні мозку. Визначено, яким чином під впли-вом цих процесів формуються ефекти інших рівнівпсихіки, як змінюється кожний з них і їх взаємодіяв ході психічного розвитку дитини. Представлено результати дослідження такого показника роз-витку сенсорно-перцептивних процесів, як точ-ність виконання окомірних завдань. Аналізуваннякількісних показників вказує на те, що в порівнянніз дошкільним віком точність окоміру в молодшихшколярів підвищується, але характеризуєтьсянестійкістю в залежності від виду завдання. В цьомувіці діти вже здатні встановлювати відношеннярівності та нерівності між об’єктами, але водночаспоказники динаміки поки що не досягають точ-ності, як у дорослих. Окрім достовірних розбіж-ностей у точності окоміру, виявлено більшу неод-норідність групи дітей з церебральним паралічему порівнянні зі здоровими дітьми як у дошкільному,так і молодшому шкільному віці. Це дає підставиприпустити, що розвиток окоміру має індивіду-альні властивості в дітей та пов’язаний із процесомприродного дозрівання. На індивідуальні вимірю-вальні особливості дітей накладаються різнома-нітні порушення сенсорно-перцептивної сфери приДЦП, зокрема, різний ступінь узгодженості роботируки та ока. Висновок. Урахування індивідуальноїспецифіки психічного розвитку дитини щодо спів-відношення узгодженості зорово-рухових функційсприятиме визначенню відповідних засобів корек-ції та створенню оптимальних умов предметної,навчальної та трудової діяльності.

Relationship between cognitive abilities and manual coordination and balance in preschool children

&amp;lt;p&amp;gt;Background: The purpose of this research was to investigate the relationship between cognitive abilities and manual coordination and balance in preschool children. Methods: The sample consisted of 41 preschool children aged 6.4&amp;amp;plusmn;0.8 on average, of both sexes (30 boys and 11 girls). On top of their regular preschool activities, the children attended a school of sports for preschool children - multisport activities and exercises, twice a week. The sample of measuring instruments comprised 4 motor tests (One-leg stand test, Mann&amp;amp;rsquo;s test, Finger to nose, Front raises) and 2 cognitive tests (Raven&amp;#039;s Colored Progressive Matrices, Cognitive Assessment System). Data was analyzed by applying Linear and Binary logistic regression analysis. Results: Based on the results of the research, one may conclude that there is a statistically significant relation between cognitive abilities and manual coordination in the tested sample of preschool children. The defined predictor system, which consisted of cognitive tests, showed a significant relationship with the hand coordination test, which was assessed by the Finger to Nose test with the eyes closed. A significant contribution to the established relation was given by the G factor estimated by Raven&amp;#039;s colored progressive matrices. Conclusions: Physical activities contribute to the development of motor skills and thus to the development of some cognitive abilities in children, which is of great importance for their further development.&amp;lt;/p&amp;gt;

Exergaming for children with probable developmental coordination disorder (p-DCD)/DCD

LANGUAGE NOTE | Document text in English; abstract also in Chinese.&#x0D; The purpose of this study was to examine the effectiveness of exergaming for improving balance, eye–hand coordination (EHC), and exercise enjoyment among children with special educational needs (SEN) and probable developmental coordination disorder (p-DCD). This study adopted a single-group intervention with paired results. Nine primary school students (seven boys and two girls, aged 7–10 years) were recruited and underwent a 3-month exergaming intervention involving three 30-minute sessions per week. Xbox One Kinect was used under the supervision of the researchers and physical education (PE) teachers. Pre- and post-intervention scores were calculated for data analysis. Motor performance was assessed using the Movement Assessment Battery for Children – Second Edition Test. The participants’ gaming experiences were captured using Fun Toolkit. The Wilcoxon signed-rank test showed significant improvements in balance and EHC, but no significant differences in enjoyment scores. The findings indicated a positive impact of exergaming on primary school students with SEN and motor problems. The outcomes indicate that exergaming is an effective strategy for improving motor skills in children with SEN and p-DCD/DCD. Therefore, exergaming could be incorporated into PE curricula to motivate students to participate in physical activities in order to improve their physical health and well-being.&#x0D; 本研究探討虛擬遊戲對改善有特殊教育需要（SEN）和（潛在）發育協調障礙的兒童的平衡、眼手協調和享受運動的功效。九名小學生參加為期三個月，每週三次30分鐘的訓練。訓練前後的遊戲分數、運動表現和遊戲體驗都被分析。研究結果顯示平衡力和眼手協調顯著地改善，但享受度沒有明顯差異。這說明虛擬遊戲對有SEN和動作協調問題的小學生有積極影響，改善運動技能。因此，將這納入體育課程，可鼓勵學生參加體能活動，改善身心健康。

Relationship of Hand Eye Coordination and Arm Length to the Accuracy of Throwing Pointing in Petanque Sports in Sukabumi City

This study aims to determine the relationship of eye hand and arm length coordination to the accuracy of throwing pointing in petanque sports. Analysis of the data used is the Pearson product moment correlation analysis technique and multiple analysis techniques to determine the relationship between two or more independent variables with one or more dependent variables. With hand eye coordination and arm length as the independent variable and pointing throw as the dependent variable. The sample of this study were 12 members of the petanque sports club in Sukabumi City. The sample is done using saturated sampling technique where the sample is the entire population, because the number is less than 30 people. The results of this study stated that the correlation results with y were obtained (2,262), Ho was rejected, and Ha was received with a contribution of 99.8%. And for the variable for y obtained (2,262), Ho is rejected, and Ha is received with a contribution of 99.6%. As for the results of the correlation with y obtained (4.26), Ho is accepted, which means there is no significant relationship between these variables and only contributes 25% to the accuracy of pointing and the remaining 75% is influenced by other variables.

A master–slave hand operation cooperative perception system for grasping object via information fusion of flexible strain sensors

The cooperative perception technology of master–slave hand operation provides intelligent and convenient support for people engaged in various risky and arduous tasks. This study presents a master–slave hand operation cooperative perception method for grasping objects through multi-information fusion of flexible strain sensors. A data glove and a strain sensor array are designed on stretchable strain sensors for accurate detection of master–slave hand ontology gestures. Meanwhile, a flexible tactile sensor array is proposed for dexterous hand interactive tactile perception. Furthermore, the master–slave hand gesture coordination method is presented. A method of perceiving dexterous hand grasping operation states is proposed on the basis of tactile perception arrays and clustering analysis of tactile perception sequences. Experimental results show that the proposed data glove and tactile sensor arrays exhibit good performance of master–slave hand ontology gesture perception and coordination as well as dexterous hand interactive tactile perception. The error measurements of the joint angle of master-slave hand during gesture coordination process were less than two degrees.

A Simultaneous Optimization Method of Calibration and Measurement for a Typical Hand–Eye Positioning System

Hand-eye calibration is one of the key technologies of robot hand and eye coordination operation. The calibration accuracy directly affects the measurement accuracy of hand-eye system. Due to the influence of environmental noise and disturbance, the results of hand-eye calibration usually contain errors. The hand-eye parameters with errors are used for vision measurement, which will lead to the calibration error into the measurement results. This error transfer phenomenon will inevitably affect the accuracy of visual measurement. In this article, a simultaneous optimization method of calibration and measurement is proposed. Based on the analysis of the motion characteristics, the measurement and calibration model with nonlinear constraints is established. An iterative method is proposed along with the closed-form solution to improve the calibration accuracy. Furthermore, the advantages of the proposed method over traditional methods are discussed. Simulation and experiment are carried out to analyze the calibration and measurement accuracy, error propagation, and solution conditions. The results demonstrate that the proposed method realizes the simultaneous optimization of calibration and measurement and can effectively suppress the influence of calibration error on measurement accuracy.

Pointing the way to social cognition: A phenomenological approach to embodiment, pointing, and imitation in the first year of infancy.

I have two objectives in this article. The first is methodological: I elaborate a minimal phenomenological method and attempt to show its importance in studies of infant behavior. The second objective is substantive: Applying the minimal phenomenological approach, combined with Meltzoff s like-me developmental framework. I propose the hypothesis that infants learn the pointing gesture at least in part through imitation. I explain how developments in sensorimotor ability (posture. arm and hand control and coordination, and locomotion) in the first year of life prepare the infant for acquiring the pointing gesture. The tinnier may directly enable the latter by allowing the infant to experience its own body as being like those of others, thus allowing it to imitatively appropriate a broader range of adult behavior. My proposal emphasizes the embodiment of mind in the development of cognition, contrary to latent dualistic tendencies in some developmental literature.

Motor imagery and action observation for predictive control in developmental coordination disorder.

In 2019, international clinical practice recommendations on the definition, diagnosis, assessment, intervention, and psychosocial aspects of developmental coordination disorder (DCD) were published. Informing our understanding of mechanisms, recent systematic reviews have shown that children with DCD have difficulties with the predictive control of movements, including aspects of motor planning, which is expressed as the internal modeling deficit hypothesis. This motor control deficit is most evident when the spatial and temporal demands of a task increase. An increasing number of empirical studies suggest that motor planning problems can be remediated through training based on one or a combination of motor imagery and action observation. In this review, we show evidence of motor planning problems in children with DCD and show that task demands or complexity affects its appearance. Implications of these findings are treatments based on motor imagery and action observation to remediate motor planning issues. The article concludes with recommendations for future research.

Evaluating Effect of Anxiety on Eye Hand Coordination Using Jenga Game in Female Nursing Professionals: An Observational Study

Amongst the general working population, female nurses were observed to have higher levels of anxiety and performed poorly under the influence of anxiety. It is still a dispute as to how it affects perceptual motor performance. Thus, this study evaluated correlation between Eye Hand Coordination and Anxiety in 67 female nursing professionals using Jenga game and Hamilton Anxiety Rating scale (HAMA). A negative correlation was perceived. This study concluded that anxiety affected motor performance. Future scope of this study would involve working on methods to cope with anxiety and improve Eye hand Coordination skills which would help nurses work efficiently.

Study on the influence of an underground low-light environment on human safety behavior

Objective. This study aimed to research the impact that a coal mine lighting environment has on human safety behavior in an underground coal mine. Methods. We built a coal mine lighting simulation experiment system including both general lighting and local lighting divided into six different illumination gradients (0, 10, 30, 50, 75 and 100 lx) to test and analyze the effects of general illumination gradients on human fatigue, attention, reaction and eye–hand coordination with SPSS version 22.0. Results. Illuminance has a significant effect on human fatigue, attention, reaction ability and eye–hand coordination ability. Specifically, human fatigue is negatively correlated and the other indicators are positively correlated with the increase of illuminance. Notably, attention distribution ability seems to be most significantly influenced by illuminance according to this study, followed by human fatigue, reaction and eye–hand coordination ability. Conclusion. The results of the study indicate that illumination of the general lighting environment is expected to be controlled at a gradient of at least 50–75 lx or above in the coal mine environment where there is both general lighting and local lighting to reduce the incidence of accidents.

Upaya Pengembangan Stimulus Motorik Halus Pada Anak Retardasi Mental Kategori Sedang

Mental retardation children's abilities need to be stimulated related to motor skills in order to be able to skillfully use hand coordination. Cross stitch is a medium that is currently developed not only as an art but as a fine motor stimulus for children. Community Service Activities are carried out at Putera Asih SLB Students in Kediri City. The activity begins with the provision of health education to teachers then the service team teaches Cross Static students. From 21 students there were 17 people who needed full assistance, and 4 of them were partially assisted. Some students bring tools home to practice with their parents and family. In the final activity of this service, the preparation of tools is assisted by devotees and teachers. At this stage, students who are fully assisted are 15 people and 6 people are partially assisted. Cross stitch activity is one of the activities that can stimulate fine motor development. These activities will be able to flex the fingers, improve the ability of fine motor coordination and increase brain stimulus for students with special needs.

Reprodutibilidade teste-reteste de uma bateria de avaliação motora para jogadores de bocha paralímpica

Objetivo: a bocha paralímpica é uma modalidade baseada em controle motor, tomada de decisão e precisão. Muito embora haja aumento no número de participantes e no desempenho apresentado pelos atletas nos eventos mundiais, diferente de outros esportes paralímpicos, a modalidade ainda não dispõe de protocolos para avaliação motora específicos destinados aos praticantes.Nosso objetivo foi montar e avaliar a reprodutibilidade de uma bateria de testes para avaliação das capacidades motoras na bocha paralímpica.&#x0D; Método: Os testes selecionados consideraram características pertinentes a prática da modalidade: a) teste de coordenação de mãos; b) teste de tempo de reação de mãos; c) teste de capacidade aeróbia; e d) teste de agilidade em formato “oito”, escolhidos pela praticidade. Dez jogadores participaram da aplicação da bateria, sendo avaliados com 7 dias de diferença. Foram determinados o viés (método de Bland-Altman), o coeficiente de correlação intraclasse (CCI) e o erro padrão de medida (EPM).&#x0D; Resultados: A análise dos dados revelou excelentes características de estabilidade das medidas ([coordenação de mãos: viés = -3.700; CCI = 0.87; EPM = 5.53]; [tempo de reação de mãos: viés = -0.500; CCI = 0.99; EPM = 1.53]; [capacidade aeróbia: viés = 8.333; CCI = 0.98; EPM = 16.44]; [agilidade no formato “oito”: viés = 2.980; CCI = 0.93; EPM = 5.28]).&#x0D; Conclusão: Recomendamos avaliações em outros atletas no sentido de criar padrões normativos baseados nas classes funcionais e no nível de desempenho dos praticantes.

Poincaré Descriptors for Identifying Hemiparesis in Acute Stroke using Wearable Accelerometry.

Stroke survivors are often characterized by hemiparesis, i.e., paralysis in one half of the body, that severely affects upper limb movements. Continuous monitoring of the progression of hemiparesis requires manual observation of the limb movements at regular intervals and hence is a labour intensive process. In this work, we use wrist-worn accelerometers for automated assessment of hemiparetic severity in acute stroke patients through bivariate Poincaré analysis between accelerometer data from the two hands during spontaneous and instructed movements. Experiments show that while the bivariate Poincaré descriptors CSD1 and CSD2 can identify hemiparetic patients from control subjects, a novel descriptor called Complex Cross-Correlation Measure (C3M) can distinguish between moderate and severe hemiparesis. Further, we justify the use of C3M by showing that it is described by multiple-lag cross-correlations, representing the co-ordination of activity between two hands. The descriptors are compared against the National Institutes of Health Stroke Scale (NIHSS), the clinical gold standard for evaluation of hemiparetic severity, and studied using statistical tests for developing supervised models for hemiparesis classification.Clinical relevance-This study establishes the suitability of wrist-worn accelerometers in identifying hemiparetic severity in stroke patients through novel descriptors of hand co-ordination.

Upaya Meningkatkan Kreativitas Membentuk Balok Bangunan Melalui Metode Praktik Langsung pada Anak Kelompok A TK Negeri Kabupaten Temanggung

Block play is the ability in constructive activities by building complex buildings using unit blocks that can improve the ability of eye and hand coordination, train fine motor skills, train children in problem solving, games that give children freedom of imagination, so that new things can created as a child's creativity a creative idea. The rationale for this improvement in learning is the lack of creativity in children. The purpose of this study are: 1) to know that through the direct practice method can increase creativity in forming building blocks in children, 2) to find out the magnitude of the increase in creativity in forming building blocks through direct practice methods in children Group A Kindergarten State Temanggung Regency Semester I 2016/2017 Academic Year. The subjects of this study were 15 students of Group A of TK Kindergarten in Temanggung Regency. Data collection methods used are observation, interviews, and documentation. The conclusion of this study is that playing building blocks has proven to be effective in increasing the creativity of children in Group A of Temanggung District Kindergarten 2016/2017 Academic Year. This is indicated by the achievement of completeness criteria in the classroom action research that has been carried out. Completeness of learning outcomes of children who get very good grades from Cycle I to Cycle II has increased by 60%, so that from the initial condition to Cycle II it has increased by 73.3%. In the performance indicators the researchers determined 80% of children could show their creativity, in Cycle II it had exceeded the expected target of 86.7% of children being able to show their creativity in creating a form using building blocks and telling the results of their work.

Neurocognitive functioning in MDR-TB patients with and without HIV in KwaZulu-Natal, South Africa.

Optimising medication adherence is one of the essential factors in reversing the tide of a TB-HIV syndemic in sub-Saharan Africa, especially South Africa. Impairment in key neurocognitive domains may impair patients' ability to maintain adherence to treatment, but the level of cognition and its relationship to HIV status has not been examined in individuals with drug-resistant TB. We therefore investigated performance on several key neurocognitive domains in relationship to HIV status in a multidrug-resistant tuberculosis patients (MDR-TB) sample. We enrolled microbiologically confirmed MDR-TB inpatients at a TB-specialist referral hospital in KwaZulu-Natal province, South Africa. We collected cross-sectional data on sociodemographic, clinical and neurocognitive function (e.g. attention, memory, executive functioning, language fluency, visual-spatial, eye-hand coordination). For the primary analysis, we excluded participants with major depressive episode/substance use disorder (MDE/SUD). We fitted adjusted Poisson regression models to explore the association between HIV and neurocognitive function. We enrolled 200 people with MDR-TB; 33 had MDE/SUD, and data of 167 were analysed (151 HIV+, 16 HIV-). The mean age of participants was 34.2years; the majority were female (83%), and 53% had not completed secondary school. There was evidence of impaired neurocognitive functioning across all domains in both HIV+/- study participants. Based on the regression analyses, individuals with co-infection (MDR-TB/HIV+), as well as those who had longer duration of hospital stays experienced significantly lower cognitive performance in several domains. Poor cognitive performance was significantly related to older age and lower educational attainment. The presence of major depression or substance use disorders did not influence the significance of the findings. Adults with MDR-TB have significant neurocognitive impairment, especially if HIV positive. An integrated approach is necessary in the management of MDR-TB as cognitive health influences the ability to adhere to chronic treatment, clinical outcomes and functionality.

Application of Teaching Methods (Ball Reflection to the Wall, Throwing Machine, in-pairs) and Eye Coordination to Increase the Drive Beating Skills on Tennis

This experimental study aims to determine differences in teaching methods and eye and hand coordination of drive punch skills in playing tennis. The teaching method is divided into three, namely teaching the reflection of the ball to the wall, teaching the throwing machine, and teaching in pairs. This research was conducted at Faculty of Sports Science, Universitas Negeri Makassar. This research applied experimental method using a 2x3 factorial design. The sample of this research consist of sixty students, they are divided into six groups that consist of ten people each. The data analysis technique was the analysis of variance (ANOVA) and continued with the Tukey test at the significance level α = 0.05. The three teaching methods in this study have different influences on the drive skills in playing tennis. This research shows that in order to improve the drive skills in playing tennis, it is necessary to involve hand-eye coordination factors in which the physical condition elements mentioned above. A better influence compared to the method of teaching bounce ball to the wall and the throwing machine teaching method on the drive punch skill in playing tennis. Based on the findings in this study, it is expected to have implications for the development of teaching methods to improve punch drive skills in playing tennis.

Evaluation of Dexterity and Eye Hand Co-ordination in Garment Industry Workers

Evaluation of Dexterity and Eye Hand Co-ordination in Garment Industry Workers

Vision Training and Reaction Training for Improving Performance and Reducing Injury Risk in Athletes

Visual processing, visual fields, and visual reaction times are essential to the performance of numerous sports and play a role in athletic injuries. Vision training, a process using visual exercises as part of a structured sports conditioning program, can be used to both enhance sports performance and prevent injury by improving neurovisual processing.&#x0D; &#x0D; In this review, evidence and methods concerning vision training programs are presented with the results suggesting performance enhancement and/or injury prevention, primarily concussion. Multiple studies are reviewed and utilized as examples that vision training programs designed to improve athletic performance or prevent injury are effective.&#x0D; &#x0D; We conclude from the collected evidence and theoretical considerations that vision training for numerous sports can be implemented with goals to improve performance and/or decrease injuries, specifically concussion.&#x0D; &#x0D; Key Points: 1) In this opinion paper we believe that vision training improves neurovisual processing. The vision training improves certain brain functions. 2) That vision training programs as part of athlete conditioning can improve athletic performance. Eye hand coordination, reaction times and peripheral awareness improve on the field of play. Obviously this benefit can be sport specific with some sports benefiting more than others. 3) There is emerging evidence that concussion rates can be decreased following pre-season vision training programs. The cause and effect needs to be better established and future research should address this opinion. &#x0D;