What nerve innervates finger movement, and what nerve innervates finger movement?

Ulnar nerve: The ulnar nerve innervates the flexor carpi ulnaris muscle (flexion of the wrist to the ulnar side), flexor digitorum profundus (flexion of the distal phalanx of the finger), palmaris brevis (** muscle proximal to the ulnar side), abductor of the little finger (abduction of the little finger), little finger to metacarpal muscle (little finger to palm), flexor of the little finger (flexion of the little finger), vermiform muscle (flexion of the metacarpophalangeal joint and extension of the proximal interphalangeal joint), interosseous muscle (flexion of the metacarpophalangeal joint and extension of the proximal interphalangeal joint), The adductor pollicis muscle (adduction of the palm of the thumb) and the deep head of the flexor pollicis brevis muscle (flexion of the first knuckle of the thumb).

The sensory branches of the ulnar nerve are: palmar cutaneous branch, which distributes the surface of the thenar muscle; dorsal cutaneous branches, distributed on the ulnar side of the dorsum of the hand and the ulnar half dorsal side of the little finger and ring finger**; The terminal superficial cutaneous ramus is distributed on the distal end of the ulnar side of the palm** and the palmar surface of the ulnar side of the little finger and ring finger**.

When the ulnar nerve is injured in the arm, it is mainly manifested as the weakening of the ability to flex the wrist, the distal phalanx of the flexor finger can not be flexed and the thumb adduction force is weak, the thenar muscle and the interosseous muscle are obviously atrophied, the fingers can not be close to each other, the metacarpophalangeal joints are hyperextended, the interphalangeal joints of the first finger are bent, which is called the "claw-shaped hand", and its sensory impairment is mainly on the medial edge of the hand.

It is innervated mainly by the radial and ulnar nerves.

The movement of the hand is caused by the contraction and relaxation of the muscles. But the contraction and relaxation of muscles are innervated by the nervous system.

The nervous system consists of two parts: the central nervous system and the peripheral nervous system. The central nervous system is the brain and spinal cord, while the peripheral nervous system is the cranial nerves and spinal nerves.

Ulnar nerve: The ulnar nerve innervates the flexor carpi ulnaris muscle (flexion of the wrist to the ulnar side), flexor digitorum profundus (flexion of the distal phalanx of the finger), palmaris brevis (** muscle proximal to the ulnar side of the hand), abductor digitorum of the little finger (abduction of the little finger), little finger to metacarpal muscle (little finger to palm), flexor of the little finger (flexion of the little finger), vermiform muscle (flexion of the metacarpophalangeal joint and extension of the proximal interphalangeal joint), interosseous muscle (flexion of the metacarpophalangeal joint and extension of the proximal interphalangeal joint), The sensory branches of the ulnar nerve of the adductor pollicis muscle (adduction of the palmar part of the thumb) and the deep head of the flexor pollicis brevis muscle (flexion of the first knuckle of the thumb) are: palmar cutaneous branch, which distributes the surface of the thenar muscle**; dorsal cutaneous branches, distributed on the ulnar side of the dorsum of the hand and the ulnar half dorsal side of the little finger and ring finger**; The terminal superficial cutaneous branch, distributed in the distal end of the ulnar side of the palm and the ulnar surface of the little finger and ring finger when the ulnar nerve is injured in the arm, is mainly manifested as the weakening of the wrist flexion ability, the distal phalanx of the flexion finger can not be flexed and the thumb adduction force is weak, the thenar muscle and the interosseous muscle are obviously atrophied, the fingers can not be close to each other, the metacarpophalangeal joints are hyperextended, the interphalangeal joints of the first finger are flexed, called "claw hand", and the sensory impairment is mainly on the medial edge of the hand.

The consciousness, mental, and thinking activities of human beings are the functions of the central nervous system.

Ulnar nerve: The sensory branches of the ulnar nerve are: palmar cutaneous branch, which distributes the surface of the thenar muscle; dorsal cutaneous branches, distributed on the ulnar side of the dorsum of the hand and the ulnar half dorsal side of the little finger and ring finger**; The terminal superficial cutaneous ramus is distributed on the distal end of the ulnar side of the palm** and the palmar surface of the ulnar side of the little finger and ring finger**.

1. Shoulder joint movement, forward flexion: source axillary nerve.

Musculosis nerves.

Posterior extension: thoracodorsal nerve, subscapular nerve, axillary nerve.

Abduction: axillary nerve, supraspinatus nerve.

Horizontal extension: axillary nerve Horizontal anterior flexion: external rotation of the anterior thoracic nerve: subscapular nerve.

Internal rotation: subscapular nerve, anterior thoracic nerve, thoracodal nerve.

2. Elbow joint movement, flexion: musculocutaneous nerve, radial nerve.

Stretch: radial nerve.

3. Forearm movement, supination: musculocutaneous nerve, radial nerve.

Pronation: median nerve.

4. Wrist joint movement, palmar flexion ulnar deviation: ulnar nerve.

Palmar flexion radial deviation: median nerve.

Ulnar deviation of dorsal extension: radial nerve Dorsal extension radial deviation: radial nerve 5, metacarpophalangeal joint activity: median nerve, ulnar nerve, radial nerve.

ulnar, radial, and median nerves.