Primitive movements that dominate reflex and voluntary effort when spasticity is present following a cerebrovascular accident. They interfere with coordinated voluntary movements such as eating, dressing, and walking. Flexion synergy patterns include scapular retraction, shoulder abduction and external rotation, elbow flexion, forearm supination, and wrist and finger flexion in the upper extremity; and hip flexion, abduction and external rotation, knee flexion, and ankle dorsiflexion in the lower extremity. Extension synergy patterns include scapular protraction, shoulder adduction and internal rotation, elbow extension, forearm pronation, and wrist and finger flexion in the upper extremity; and hip extension, adduction and internal rotation, knee extension, ankle plantar flexion and inversion, and toe flexion in the lower extremity.
Medical Dictionary, © 2009 Farlex and Partners