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Supinator and Biceps

Supinator and Biceps . Weakness: Weakness of these muscles allows the forearm to remain in a pronated position. Weakness also interferes with many functions of the extremity, particularly those involved in feeding oneself.

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Supinator and Biceps

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  1. Supinator and Biceps • Weakness: Weakness of these muscles allows the forearm to remain in a pronated position. Weakness also interferes with many functions of the extremity, particularly those involved in feeding oneself. • Contracture: Elbow flexion with forearm supination. Contracture results in marked interference with functions of the extremity that involve the change from supinated to pronated position of forearm.

  2. Elbow Flexors (Biceps Brachii, Brachialis and Brachioradialis) • Weakness: Decreases the ability to flex the forearm against gravity. There is marked interference with such daily activities as feeding oneself or combing hair. • Shortness: Flexion deformity of the elbow.

  3. Clinically

  4. Elbow Extensors (Triceps Brachii and Anconeus) • Weakness: Resultsin the inability to extend the forearm against gravity. • There is interference with everyday functions which involve elbow extension as in reaching upward toward a high shelf. • There is loss of ability to throw objects or push with the extended elbow. • An individual is handicapped in using crutches or a cane sine he cannot extend his elbow and transfer weight to his hand. • Contracture: Extensiondeformity of the elbow. • Marked interference with everyday functions that involve elbow flexion.

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