Article

Previous studies have demonstrated improved neurobehavioral outcomes
when prosthesis users learn task-specific behaviors by imitating movements of
prosthesis users (matched limb) compared with intact limbs (mismatched limb).
This study is the first to use a unique combination of
neurophysiological and task performance methods to investigate prosthetic device
training strategies from a cognitive motor control perspective. Intact
nonamputated prosthesis users (NAPUs) donned specially adapted prosthetic devices
to simulate the wrist and forearm movement that persons with transradial limb
loss experience. The hypothesis is that NAPUs trained with matched limb imitation
would show greater engagement of parietofrontal regions and reduced movement
variability compared with their counterparts trained with a mismatched limb.
Methods Training elapsed over
3 days comprised alternating periods of video
demonstration observation followed by action imitation.
At the beginning and end
of the training protocol, participants performed a cued movement paradigm while
electroencephalography and electrogoniometry data were collected to track changes
in cortical activity and movement variability, respectively. Results Matched limb
participants showed greater engagement of motor-related areas while mismatched
limb participants showed greater engagement of the parietooccipital system.
Matched limb participants also showed lower movement variability. Conclusions
These results indicate that the type of limb imitated influences neural and
behavioral strategies for novel prosthetic device usage.
This finding is
important, as customary prosthetic rehabilitation with intact therapists involves
mismatched limb imitation that may exacerbate challenges in adapting to new motor
patterns demanded by prosthesis use.
CI - (c) The Author(s) 2015.

Langue : ANGLAIS