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[A tridimensional study of lateral grasping and pointing in spatial neglect]
C Bénaïm1, J L Blatt, M Rousseaux
1Service de Rééducation Neurologique, Hôpital Swynghedauw, Lille.
Revue Neurologique
|July 13, 2000
Summary
Patients with spatial neglect exhibit impaired upper limb and head movement coordination, particularly during leftward reaching tasks. This study highlights movement desynchronization as a key issue in spatial neglect.
Area of Science:
- Neuroscience
- Biomechanics
- Motor Control
Context:
- Spatial neglect is a neurological disorder affecting awareness of one side of space.
- Understanding kinematic alterations in spatial neglect is crucial for rehabilitation.
Purpose:
- To analyze ipsilateral upper limb and head kinematics in spatial neglect patients during pointing and grasping tasks.
- To compare movement patterns between patients with spatial neglect and healthy controls.
Summary:
- Patients with spatial neglect showed reduced wrist velocity and prolonged movement times, especially for leftward actions.
- While head movement amplitude and velocity were comparable, head-wrist coordination decreased in neglect patients during leftward movements.
- Intersegmental coordination (head-shoulder-wrist) sequence remained similar, but temporal synchronization was disrupted.
Impact:
- Reveals a global disorder of intentional movements in spatial neglect, predominantly affecting the approach phase.
- Demonstrates head-wrist movement desynchronization as a significant issue in spatial neglect patients.
- Provides insights into visuo-motor adjustments and potential targets for therapeutic interventions.