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Cutaneous innervation of the upper limbs is the nerve supply to areas of the skin of the upper limbs (including the arm, forearm, and hand) which are supplied by specific cutaneous nerves. Modern texts are in agreement about which areas of the skin are served by which cutaneous nerves, but there are minor variations in some of the details.
Interosseous membrane labeled at bottom center. The interosseous membrane of the forearm (rarely middle or intermediate radioulnar joint) is a fibrous sheet that connects the interosseous margins of the radius and the ulna. It is the main part of the radio-ulnar syndesmosis, a fibrous joint between the two bones.
The musculocutaneous nerve is a mixed branch of the lateral cord of the brachial plexus derived from cervical spinal nerves C5-C7. It arises opposite the lower border of the pectoralis major. It provides motor innervation to the muscles of the anterior compartment of the arm: the coracobrachialis, biceps brachii, and brachialis. [ 1 ]
visible in purple.) The lateral cutaneous nerve of forearm (or lateral antebrachial cutaneous nerve) is a sensory nerve representing the continuation of the musculocutaneous nerve beyond the lateral edge of the tendon of the biceps brachii muscle. The lateral cutaneous nerve provides sensory innervation to the skin of the lateral forearm.
Pivot joint. In animal anatomy, a pivot joint (trochoid joint, rotary joint or lateral ginglymus) is a type of synovial joint whose movement axis is parallel to the long axis of the proximal bone, which typically has a convex articular surface. According to one classification system, a pivot joint like the other synovial joint —the hinge ...
The patient needs to be in a seated position with the elbow flexed to 90°, forearm pronated (palm facing the ground), and the arm stabilized against the thorax. [2] [3] [4] The examiner places the stabilizing hand on the proximal portion of the humerus near the bicipital groove, and the resistance hand on the distal forearm and wrist. [1] [2]
The driver extends their right arm with the forearm pointing vertically downwards and moving in a circular anti-clockwise motion. Drivers of tractors, animal-drawn vehicles and two-wheeled vehicles may also extend their left arm horizontally with the palm facing forwards. Signal lights or turn indicators may be used in place of hand signals if ...
The anconeus muscle (or anconaeus / anconæus) is a small muscle on the posterior aspect of the elbow joint. Some consider anconeus to be a continuation of the triceps brachii muscle. [1][2][3] Some sources consider it to be part of the posterior compartment of the arm, [4] while others consider it part of the posterior compartment of the forearm.