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Dr. Ebraheim’s educational animated video describes the major peripheral nerves of the upper extremity. The upper extremity contains neumerous nerves that transmit signals for functions such as muscle contraction, reflexes and sensation. - The Radial nerve: • Motor test: wrist extension, thumb extension. • Sensory innervation of the skin: upper arm and forearm • The superficial radial nerve is a sensory nerve supplying the majority of the dorsum of the hand. • Sensation test: dorsal web space between the thumb and the index finger. - The Ulnar nerve: • Motor test: the ulnar nerve: the little finger abduction. • Palmar: The ulnar nerve provides palmar and dorsal sensory innervation to the little finger and half of the ring finger. • Dorsal: sensation test: distal ulnar aspect of the little finger. - The Median nerve: • Motor test: thumb pinch, opposition of thumb, abduction of thumb. • The median nerve innervates the skin on the palmar side of the thumb, the index finger, the middle finger, and half of the ring finger. • Sensation test: distal radial aspect of the index finger. - Axillary nerve: • Motor test: shoulder abduction (deltoid muscle). • The axillary nerve supplies the deltoid muscle, giving sensation over the shoulder area. • Sensation test: lateral arm: deltoid patch on the upper arm. - Musculocutaneous nerve: • This nerve is the primary nerve supply to these three muscles: coracobrachialis, brachialis, and the biceps muscle. • Motor test: elbow flexion (biceps muscle). - Lateral antenrachial cutaneous nerve: • Motor test: lateral forearm. Become a friend on facebook: / drebraheim Follow me on twitter: https://twitter.com/#!/DrEbraheim_UTMC Background music provided as a free download from YouTube Audio Library. Song Title: Every Step