Superficial branch of ulnar nerve

Superficial branch of ulnar nerve is a branch of the ulnar nerve that provides sensory innervation to the skin of the hand. It is a part of the peripheral nervous system and is considered one of the terminal branches of the ulnar nerve.

Etymology

The term "ulnar" is derived from the Latin word "ulna," which refers to the inner and larger bone of the forearm. The term "superficial" is derived from the Latin word "superficialis," which means "pertaining to the surface."

Anatomy

The superficial branch of the ulnar nerve originates from the ulnar nerve, which itself is a branch of the brachial plexus. It travels down the forearm, passing over the flexor carpi ulnaris muscle and under the palmar carpal ligament. It then divides into a palmar and a dorsal branch.

The palmar branch supplies the skin of the little finger and the adjacent half of the ring finger, as well as the associated area of the palm. The dorsal branch supplies the skin of the back of the hand from the wrist to the bases of the little finger and the adjacent half of the ring finger.

Clinical significance

Damage to the superficial branch of the ulnar nerve can result in a loss of sensation in the areas of the hand that it supplies. This can occur as a result of trauma, compression, or disease. Treatment typically involves addressing the underlying cause and may include physical therapy, medication, or surgery.

Related terms

• Ulnar nerve
• Brachial plexus
• Flexor carpi ulnaris
• Palmar carpal ligament

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