Article

Descriptive control case study. Objectives :To analyze the kinematics
of tenodesis grasp in participants with C6 quadriplegia and healthy control
participants in a pointing task and two daily life tasks involving a whole hand
grip (apple) or a lateral grip (floppy disk).Setting:France.Methods:Four complete
participants with C6 quadriplegia were age matched with four healthy control
participants. All participants were right-handed. The measured kinematic
parameters were the movement time (MT), the peak velocity (PV), the time of PV
(TPV) and the wrist angle in the sagittal plane at movement onset, at the TPV and
at the movement end point.Results:The participants with C6 quadriplegia had
significantly longer MTs in both prehension tasks. No significant differences in
TPV were found between the two groups. Unlike control participants, for both
prehension tasks the wrist of participants with C6 quadriplegia was in a neutral
position at movement onset, in flexion at the TPV, and in extension at the
movement end point.Conclusion:Two main kinematic parameters characterize
tenodesis grasp movements in C6 quadriplegics: wrist flexion during reaching and
wrist extension during the grasping phase, and increased MT reflecting the time
required to adjust the wrist's position to achieve the tenodesis grasp. These
characteristics were observed for two different grips (whole hand and lateral
grip). These results suggest sequential planning of reaching and tenodesis grasp,
and should be taken into account for prehension rehabilitation in patients with
quadriplegia.

Langue : ANGLAIS