Hand Anatomy Muscles

While all interossei bend the mcp joints the dorsal interossei allow us to spread our fingers away from each other. These are four lumbricals in the hand each associated with a finger.

Anatomy Lectures Hand Hand Muscles

The muscles of the hand consist of five groups.

Hand anatomy muscles. This is a slender triangle shaped tendon a fibrous band. The metacarpals articulate with the proximal phalanges which articulate with the middle phalanges which finally articulate with the distal phalanges. Some of the muscles tendons and ligaments of the hand as well as those of the forearm that affect hand movement include.

The hand is an intricately complex structure whose muscles have evolved to permit an unequalled array of movements. Many of the muscles that move the fingers and thumb originate in the forearm. Muscles of the hand thenar muscles.

More than 30 individual muscles in the hand and forearm work together to achieve these diverse movements. There are four dorsal and three palmar interossei muscles. The muscles on the anterior side of the forearm such as the flexor carpi radialis and flexor digitorum superficialis form the flexor group that flexes the hand at the wrist and each of the phalanges.

The hypothenar muscles produce the hypothenar eminence a muscular protrusion. This is a tutorial on those muscles. The red lines show where the tendons attach the muscles to the bones.

The thenar muscles are three short muscles located at the base of the thumb. The intrinsic muscles of the hand are those muscles that are responsible for position grip. Hand muscles and hand tendons.

The palmar interossei pull our fingers together. Hand muscles interossei dorsal and palmar the interossei muscles begin between the bones of the hand. The image below shows the bones of the hand from the back side.

The muscles in the forearm and palm thenar muscles all work together to keep the wrist and hand moving stable and well aligned. The tendons of these muscles pass through a small corridor in the wrist known as the carpal tunnel. The bones of the hand.

Muscles of the hand. The muscles that originate in the forearm and insert onto the hand are responsible for power grip and the muscles that originate in the hand and are responsible for position grip are the intrinsic muscles. The pisiform is a pea shaped sesamoid bone that sits on the triquetrum and lies within the tendon of flexor carpi ulnaris.

This forearm muscle is responsible for extending all of the fingers.

Muscles Of The Forearm