Interlimb transfer of unimanual grasping movement in upper limb amputees - A pilot study.

Allami, N; Frossard, L et Frak, V (2013). « Interlimb transfer of unimanual grasping movement in upper limb amputees - A pilot study. » (XIV World Congress of the International Society for Prosthetics and Orthotics (ISPO)., India, 4-7 février 2013) Hyderabad, India., p. 393.

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Résumé

Background. Inter-hemispheric communication is necessary during uni- manual grip of an object (1). The right and left hands share a level of representation in the motor program that is common to both (2). It could be essential to take into consideration bi- hemispheric activity to adapt prosthesis of individuals with upper limb amputation. Objective. To determine the relevance of the inter-hemispheric dependence in the programing and execution of uni-manual grip in individuals with upper limb amputation. Methods. Five adults with amputation of the upper limb above and below the elbow participated in this study. Each participant was seated and asked to grab and lift an instrumented cylinder with the sound hand 15 times (Figure 1). The cylinder enabled to record in real time the apposition axis (AO) passing by the thrum, the centre of the cylinder and the first finger as well as the forces applied during the griping period of 2000 ms. The participants were assessed during the temporary (PP) and definitive (PD) phases of prosthesis fitting the after the amputation. Student t-tests were used to determine the effect of different prosthetic phases on the force and orientation of the griping hand. Results 1. A significant reduction (p<0.01) of the forces applied by the sound hand between the two prosthetic phase for 4/5 of the participants (Figure 2) 2. Some changes in the gripping orientation when the amputated hand was dominant for 2/3 of the participants (Figure 3) 3. No changes in the gripping orientation when the amputated hand was not dominant Conclusion. Grip programming and execution with sound hand: 1. Change between two prosthetic fitting phases 2. Depend on the inter-hemispheric transfer related to the force regardless on the amputated hand. 3. Depend on the inter-hemispheric transfer related to the gripping orientation only when the amputated side is dominant. Adjustments in griping force and orientation of the prosthesis depending on the grip correction of the sound hand might be respectively more necessary regardless of the amputated hand and when the amputated hand is dominant. Because of the variability between participants concerning the side of amputation and manual dominance, other studies will be required to generalise these results.

Type: Communication, article de congrès ou colloque
Mots-clés ou Sujets: INTER-HEMISPHERIC, UPPER LIMB AMPUTATION, OPPOSITION AXIS, INSTRUMENTED CYLINDER
Unité d'appartenance: Faculté des sciences
Déposé par: Victor Frak
Date de dépôt: 13 mars 2013 12:37
Dernière modification: 01 nov. 2014 02:24
Adresse URL : http://www.archipel.uqam.ca/id/eprint/5205

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