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.
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Background music provided as a free download from YouTube Audio Library.
Song Title: Every Step
