Jun 28 • General discussion
Sensory distribution of median ,radial and ulnar nerves
The median, ulnar, and radial nerves each provide distinct sensory innervation to different areas of the hand and forearm. The median nerve supplies the palmar side of the thumb, index, middle, and radial half of the ring finger, as well as the dorsal tips of the index, middle, and radial half of the ring finger. The ulnar nerve provides sensation to the palmar and dorsal aspects of the little finger and the ulnar half of the ring finger. The radial nerve is responsible for sensation on the dorsal aspect of the hand, specifically the lateral (radial) side, including the thumb, index, middle, and radial half of the ring finger.
Median Nerve:
- Palmar Surface: Thumb, index finger, middle finger, and radial half of the ring finger.
- Dorsal Surface: Tips of the index, middle, and radial half of the ring finger.
- Areas not innervated by the median nerve: The ulnar side of the hand (little finger and ulnar half of the ring finger) is not innervated by the median nerve.
Ulnar Nerve:
- Palmar and Dorsal Surface:Little finger and ulnar half of the ring finger.
Radial Nerve:
- Dorsal Surface: Lateral (radial) side of the hand, including the thumb, index, middle, and radial half of the ring finger.
Important Considerations:
- The sensory distribution can vary slightly between individuals.
- There may be some overlap or communication between the nerve branches, especially near the borders of their distributions.
- Clinically, understanding the sensory distribution of these nerves is crucial for diagnosing and treating nerve injuries, such as carpal tunnel syndrome (median nerve) or ulnar nerve compression.
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Sensory distribution of median ,radial and ulnar nerves
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