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| Author | Portnoy, S.; Rosenberg, L.; Alazraki, T.; Elyakim, E.; Friedman, J. | ||||
| Title | Differences in Muscle Activity Patterns and Graphical Product Quality in Children Copying and Tracing Activities on Horizontal or Vertical Surfaces | Type | Journal Article | ||
| Year | 2015 | Publication | Journal of Electromyography and Kinesiology | Abbreviated Journal | Journal of Electromyography and Kinesiology |
| Volume | 25 | Issue | 3 | Pages | 540�547 |
| Keywords | Motor equivalence; Electromyography; Tablet; Occupational Therapy; Muscle fatigue; Motor control | ||||
| Abstract | The observation that a given task, e.g. producing a signature, looks similar when created by different motor commands and different muscles groups is known as motor equivalence. Relatively little data exists regarding the characteristics of motor equivalence in children. In this study, we compared the level of performance when performing a tracing task and copying figures in two common postures: while sitting at a desk and while standing in front of a wall, among preschool children. In addition, we compared muscle activity patterns in both postures. Specifically, we compared the movements of 35 five- to six-year old children, recording the same movements of copying figures and path tracing on an electronic tablet in both a horizontal orientation, while sitting, and a vertical orientation, while standing. Different muscle activation patterns were observed between the postures, however no significant difference in the performance level was found, providing evidence of motor equivalence at this young age. The study presents a straightforward method of assessing motor equivalence that can be extended to other stages of development as well as motor disorders. | ||||
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| ISSN | 1050-6411 | ISBN | Medium | ||
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| Notes | Approved | no | |||
| Call Number | Serial | 77 | |||
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| Author | Raveh, E.; Friedman, J.; Portnoy, S. | ||||
| Title | Visuomotor behaviors and performance in a dual-task paradigm with and without vibrotactile feedback when using a myoelectric controlled hand | Type | Journal Article | ||
| Year | 2018 | Publication | Assistive Technology | Abbreviated Journal | Assistive Technology |
| Volume | 30 | Issue | Pages | 274-280 | |
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| ISSN | 1040-0435 | ISBN | Medium | ||
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| Notes | Approved | no | |||
| Call Number | Serial | 85 | |||
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| Author | Raveh, E.; Friedman, J.; Portnoy, S. | ||||
| Title | Evaluation of the effects of adding vibrotactile feedback to myoelectric prosthesis users on performance and visual attention in a dual-task paradigm | Type | Journal Article | ||
| Year | 2018 | Publication | Clinical Rehabilitation | Abbreviated Journal | Clin Rehabil |
| Volume | 99 | Issue | 11 | Pages | 2263-2270 |
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| Abstract | Objective: To evaluate the effects of adding vibrotactile feedback to myoelectric prosthesis users on the performance time and visual attention in a dual-task paradigm. Design: A repeated-measures design with a counterbalanced order of two conditions. Setting: Laboratory setting. Subjects: Transradial amputees using a myoelectric prosthesis with normal or corrected eyesight (N=12, median age=65 ± 13 years). Exclusion criteria were orthopedic or neurologic problems. Interventions: Subjects performed grasping tasks with their prosthesis, while controlling a virtual car on a road with their intact hand. The dual task was performed twice: with and without vibrotactile feedback. Main measures: Performance time of each of the grasping tasks and gaze behavior, measured by the number of times the subjects shifted their gaze toward their hand, the relative time they applied their attention to the screen, and percentage of error in the secondary task. Results: The mean performance time was significantly shorter (P=0.024) when using vibrotactile feedback (93.2 ± 9.6 seconds) compared with the performance time measured when vibrotactile feedback was not available (107.8 ± 20.3seconds). No significant differences were found between the two conditions in the number of times the gaze shifted from the screen to the hand, in the time the subjects applied their attention to the screen, and in the time the virtual car was off-road, as a percentage of the total game time (51.4 ± 15.7 and 50.2 ± 19.5, respectively). Conclusion: Adding vibrotactile feedback improved performance time during grasping in a dual-task paradigm. Prosthesis users may use vibrotactile feedback to perform better during daily tasks, when multiple cognitive demands are present. |
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| ISSN | 0269-2155 | ISBN | Medium | ||
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| Notes | Approved | no | |||
| Call Number | Penn State @ write.to.jason @ | Serial | 89 | ||
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| Author | Portnoy, S.; Mimouni-Bloch, A.; Rosenberg, L.; Offek, H.; Berman, T.; Kochavi, M.; Orman, G.; Friedman, J. | ||||
| Title | Graphical Product Quality and Muscle Activity in Children With Mild Disabilities Drawing on a Horizontally or Vertically Oriented Tablet | Type | Journal Article | ||
| Year | 2018 | Publication | American Journal of Occupational Therapy | Abbreviated Journal | Am J Occup Ther |
| Volume | 72 | Issue | 6 | Pages | 1-7 |
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| Abstract | OBJECTIVE. We compared performance level and muscle activity patterns during shape copying and tracing in two positions, while sitting at a desk and while standing in front of a wall, between typically developing (TD) preschool children and children with mild disabilities (MD). METHOD. Twenty-two TD children (8 boys, 14 girls; mean [M] age 5 5.2 yr, standard deviation [SD] 5 0.1) and 13 children with MD (9 boys, 4 girls; M age 5 4.9 yr, SD 5 0.5) participated in this study. RESULTS. The children performed faster and smoother movements when copying shapes on the vertical surface, with no reduction of accuracy, than on the horizontal surface. Children with MD exerted their upper trapezius while performing the short tasks on the vertical surface compared with their muscle activity on the horizontal surface. CONCLUSION. Incorporating short copying or drawing tasks on a vertical surface may increase the control of proximal muscles and ease graphomotor performance in children with MD. |
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| ISSN | 0272-9490 | ISBN | Medium | ||
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| Notes | Approved | no | |||
| Call Number | Penn State @ write.to.jason @ | Serial | 91 | ||
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| Author | Kaufman-Cohen, Y.; Friedman, J.; Levanon, Y.; Jacobi, G.; Doron, N.; Portnoy, S. | ||||
| Title | Wrist Plane of Motion and Range During Daily Activities | Type | Journal Article | ||
| Year | 2018 | Publication | American Journal of Occupational Therapy | Abbreviated Journal | Am J Occup Ther |
| Volume | 72 | Issue | 6 | Pages | 1-10 |
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| Abstract | OBJECTIVE. The dart-throwing motion (DTM) is a multiplane wrist motion that is needed for many daily occupations. Mobilization along the DTM plane may be essential for rehabilitation after wrist injury, but DTM angles are reported for the dominant hand alone, so their relevance to injury in the nondominant hand cannot be surmised. The aim of this study was to quantify the DTM plane angles for both hands during different activities of daily living (ADLs). METHOD. Forty-three healthy participants wore a twin-axis electrogoniometer during ADLs. RESULTS. No significant differences were found between the DTM plane angles of the dominant (20°�45°) and nondominant (15°�40°) hands. These angles varied by task and across participants. CONCLUSION. The DTM plane is a functional motion used by both hands during ADLs. Because the DTM plane angle differs among hands, tasks, and individual clients, wrist rehabilitation involving the DTM plane should not be limited to a singular DTM plane angle.OBJECTIVE. The dart-throwing motion (DTM) is a multiplane wrist motion that is needed for many daily occupations. Mobilization along the DTM plane may be essential for rehabilitation after wrist injury, but DTM angles are reported for the dominant hand alone, so their relevance to injury in the nondominant hand cannot be surmised. The aim of this study was to quantify the DTM plane angles for both hands during different activities of daily living (ADLs). METHOD. Forty-three healthy participants wore a twin-axis electrogoniometer during ADLs. RESULTS. No significant differences were found between the DTM plane angles of the dominant (20°�45°) and nondominant (15°�40°) hands. These angles varied by task and across participants. CONCLUSION. The DTM plane is a functional motion used by both hands during ADLs. Because the DTM plane angle differs among hands, tasks, and individual clients, wrist rehabilitation involving the DTM plane should not be limited to a singular DTM plane angle. |
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| ISSN | 0272-9490 | ISBN | Medium | ||
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| Notes | Approved | no | |||
| Call Number | Serial | 92 | |||
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