Thumb Anatomy Nerves

This tendon also travels along the back of the thumb and helps straighten the thumb but it connects the muscle in the back of the forearm to the bone at the tip of the thumb. Ulnar nerve palmar and dorsal back of the hand surface of the other half.

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The extensor indicis extends the index finger while the palmar interosseus adducts it.

Thumb anatomy nerves. Radial nerve dorsal surface excluding the tips of the thumb. The thumb possesses a unique and wide range of motion not shared by the hands other digits. It also supplies nerves to the lumbrical muscles to the index and middle fingers.

The wrist is a complex mechanical system of 8 small bones known as the carpal bones. One row connects with the ends of the bones in the forearm radius and ulna. Oxygenated blood arrives at the finger through the common palmar artery which extends off of the palmar arch connecting the ulnar and radial arteries.

The median nerve travels through a tunnel within the wrist called the carpal tunnel. The thumb is the first of the hands five digits but it is typically not referred to as a finger. The carpal bones are arranged in 2 interrelated rows.

The wrist links the hand to the arm. It also supplies the back of the thumb and just beyond the main knuckle of the back surface of the ring and middle fingers. The skin of the fingers are supplied by different nerves as follows.

In the hand the median nerve supplies the thenar eminence the muscles at the base of the thumb with nerves. The median nerve innervates the fingers skin. It gives sensation to the back of the hand from the thumb to the third finger.

Anatomy of the hand and wrist. Bones muscles tendons nerves. Median nerve palmar surface tips and nail beds of the thumb index.

The median nerve provides sensation to the thumb side of the palm the thumb index middle and half of the ring finger.

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