TY - JOUR
T1 - Feedback-based training of grip force control in patients with brain damage
AU - Kriz, Günter
AU - Hermsdörfer, Joachim
AU - Marquardt, Christian
AU - Mai, Norbert
PY - 1995/7
Y1 - 1995/7
N2 - Objective: Feedback-based training of grip force control in patients with various brain lesions was evaluated. Design: Patients were instructed to hold a force transducer in a precision grip and to track with their grip force a moving target, which was presented together with the feedback signal on a monitor. Training performance was evaluated during a maximum of 10 sessions. Before and after the training, performance in two transfer tasks, which differed in target characteristics from the training task, was examined. Patients: Ten patients with impaired grip force control, after brain lesions of different origin, were selected on the basis of a clinical examination of hand function. Main Outcome Measures: Tracking accuracy in training tasks and transfer tasks was evaluated by calculating the conventional root-mean-square error. Results: Nine out of the 10 patients reduced their tracking error considerably during a maximum of 10 subsequent sessions (t test, p < 0.05), and most of them reached normal or near-normal performance. In addition, they improved in both transfer tasks (t test, p < 0.05). Detailed analysis showed that impaired initial performance and improvement was not uniform among patients and could be attributed to individual aspects of force control. Conclusions: In view of these results, a feedback-based training of grip force may be a useful enrichment of motor therapy.
AB - Objective: Feedback-based training of grip force control in patients with various brain lesions was evaluated. Design: Patients were instructed to hold a force transducer in a precision grip and to track with their grip force a moving target, which was presented together with the feedback signal on a monitor. Training performance was evaluated during a maximum of 10 sessions. Before and after the training, performance in two transfer tasks, which differed in target characteristics from the training task, was examined. Patients: Ten patients with impaired grip force control, after brain lesions of different origin, were selected on the basis of a clinical examination of hand function. Main Outcome Measures: Tracking accuracy in training tasks and transfer tasks was evaluated by calculating the conventional root-mean-square error. Results: Nine out of the 10 patients reduced their tracking error considerably during a maximum of 10 subsequent sessions (t test, p < 0.05), and most of them reached normal or near-normal performance. In addition, they improved in both transfer tasks (t test, p < 0.05). Detailed analysis showed that impaired initial performance and improvement was not uniform among patients and could be attributed to individual aspects of force control. Conclusions: In view of these results, a feedback-based training of grip force may be a useful enrichment of motor therapy.
UR - http://www.scopus.com/inward/record.url?scp=0029052326&partnerID=8YFLogxK
U2 - 10.1016/S0003-9993(95)80635-0
DO - 10.1016/S0003-9993(95)80635-0
M3 - Article
C2 - 7605185
AN - SCOPUS:0029052326
SN - 0003-9993
VL - 76
SP - 653
EP - 659
JO - Archives of Physical Medicine and Rehabilitation
JF - Archives of Physical Medicine and Rehabilitation
IS - 7
ER -