Hand Nerve Anatomy

The majority of the intrinsic hand muscles are innervated by the deep branch of the ulnar nerve. The median nerve enters the hand through the carpal tunnel which is a passageway between the tubercles of the scaphoid and trapezium bones laterally and by the pisiform and the hook of the hamate on the medial side.

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These nerves control the muscles of the forearm and hand and give us the sensations of touch temperature and pain.

Hand nerve anatomy. The hand is innervated by the radial median and ulnar nerves. This plexus is formed from the combination of the anterior branches of the 5th to 8th cervical spinal nerves and the first thoracic one. Each hand consists of 19 bones.

The median nerve supplies sensation to the radial 3 and a half fingers on the palmar aspect as well as the nail beds. The connection point between the arm and the hand the wrist enables hand movements. The ulnar nerve c8 t1 supplies all of the intrinsic muscles of the hand apart from the muscles of the thenar eminence and the radial two lumbricals these muscles are supplied by the median nerve c5 t1.

Nerves of the hand. It also supplies nerves to the lumbrical muscles to the index and middle fingers. Hypothenar muscles a group of muscles associated with the little finger.

The palm includes five metacarpals and each finger except the thumb. In humans the fibers of the radial nerve originate in the lower cervical and upper thoracic spinal cord usually c5 to t1 travel via the posterior cord of the brachial plexus and supply motor innervation to extensor muscles of the arm and cutaneous sensory fibers to extensor regions of the arm and hand. Along the anterior of the forearm the median and ulnar nerves supply nerve signals to the skin and to the flexor muscles of the hand and fingers.

The median nerve provides sensation to the thumb side of the palm the thumb index middle and half of the ring finger. As major sensory components of the body the hands are the destination for a majority of the nerves in the upper limb. The radial nerve supplies the finger extensors and the thumb abductor thus the muscles that extends at the wrist and metacarpophalangeal joints knuckles.

The nerves innervating the muscles of the hand originate higher up from a structure called the brachial plexus. In the hand the median nerve supplies the thenar eminence the muscles at the base of the thumb with nerves. Hand nerves the median radial and ulnar nerves are the three major nerves that run the length of the entire arm.

It gives nerve supply to the thenar muscles and the first two lumbricals plus it sends sensory fibers to the skin on the lateral part of the palm and to the sides and distal portions of the first three digits. A major nerve of the upper extremity.

Median Nerve Block Overview Indications Contraindications