APPLIED RADIOLOGICAL ANATOMY

Detailed explanation-1: -In clinical practice, the typical flexion synergy of the upper limb post-stroke includes scapula lifting and internal rotation, glenohumeral joint abduction and external rotation, elbow flexion, forearm supination or pronation, and wrist and finger flexion.

Detailed explanation-2: -What Are Synergy Patterns? Coordinated muscle movements are a result of different muscle groups working together. These movement patterns are called synergies, and are responsible for muscle contraction and motions that appear smooth and controlled.

Detailed explanation-3: -Flexor synergy, otherwise known as spasticity, refers to the muscle “drawing” or “pulling in”, in turn making the muscle in a limb feel stiff, tight, or immovable. The most common areas affected by flexor synergy are elbow flexion paired with shoulder internal rotation, forearm supination, and grasp.

Detailed explanation-4: -Historically, two main synergies of the upper limb have been identified after stroke. These are the flexor synergy, in which shoulder, elbow, and wrist flexion are obligatorily linked, and the opposite extensor synergy (Twitchell, 1951; Brunnström, 1970).