Muscles of the hand

Tendons attach the bones to the muscles of the hand and arm. There are 20 intrinsic muscles in hand.

Flexion of the forearm is achieved by a group of three muscles the brachialis biceps brachii and brachioradialis.

Muscles of the hand. Muscles of the hand. Muscles of the Hand Thenar Muscles. The thenar muscles are three short muscles located at the base of the thumb.

The muscle bellies produce. The hypothenar muscles produce the hypothenar eminence a muscular protrusion on the medial side of. These are four.

Some of the muscles tendons and ligaments of the hand as well as those of the forearm that affect hand movement include. This forearm muscle is responsible for extending all of the fingers of the hand except the thumb. This is a slender triangle-shaped.

Hand Muscles Interossei dorsal and palmar. The interossei muscles begin between the bones of the hand. There are four dorsal and.

The hypothenar muscle group is formed by three muscles. The abductor digiti minimi the flexor digiti. The thenar muscle group is found at the.

The muscles of the hand are responsible for the hand and fingers movement. The muscles of the hand are redivided into two groups. The extrinsic muscles and the intrinsic muscle groups.

The extrinsic groups are the long flexors and extensors muscles. They are termed extrinsic muscles because the muscle belly is positioned on the forearm. The thenar muscles which form the bulge of muscles evident at the base of the thumb are essential to the hands.

The three hypothenar muscles form a small bulge of muscles on the medial side of the palm opposite from the thenar. Found in the middle of the palm between the metacarpals the. In contrast the other two nerves supply the hand muscles.

The median nerve predominantly supplies the thenar muscles while the ulnar nerve mainly innervates the hypothenar and other intrinsic muscles of the hand. The main branches projecting onto the hand muscles are from the median and ulnar nerves. Flexion of the forearm is achieved by a group of three muscles the brachialis biceps brachii and brachioradialis.

These flexor muscles are all located on the anterior side of the upper arm and extend from the humerus and scapula to the ulna and radius of the forearm. The wrist and hand muscles include the flexor pollicis longus flexor digitorum superficialis flexor carpi ulnaris flexor carpi radialis extensor digitorum communis extensor carpi ulnaris and the extensor carpi radialis muscles. They have a lot of complicated long names.

The lumbrical muscles of the hand are four small fleshy muscles that are associated with tendons between the four fingers of the hand. Each lumbrical muscle flexes the corresponding digital joint to extend the finger in question. The opponens pollicis muscle The opponens pollicis muscle flexes and adducts the thumb.

There are two groups of muscles of hand extrinsic muscles and intrinsic muscles. Intrinsic muscles of the hand are those muscles which are located within the hand itself in contrast to extrinsic muscles which originate proximally in the forearm and insert into the hand by long tendons. Flexor Pulley System of the Fingers Long Flexor Tendons.

The long flexor tendons of the fingers arise from the flexor digitorum superficialis FDS and flexor digitorum profundus FDP forearm muscles. These tendons enter the hand via the carpal tunnel enclosed in a common synovial sheath. Within the hand the tendons fan out and enter their respective fibrous flexor sheaths.

Origin And Insertion Of The Palmar And Dorsal Interossei Intrinsic Muscles of the Hand are short muscles whose origin and insertion is enclosed within the area of the hand. These muscles make possible the skilled movements of the hand and also help the hand in adjusting for proper gripping. There are 20 intrinsic muscles in hand.

Intrinsic muscles of the hand apart from the thenar muscles and two lateral lumbricals Sensory functions. Medial one and half fingers and the associated palm area. The ulnar nerve arises from the brachial plexus within the axilla region.

It is a continuation of the medial cord and contains fibres from spinal roots C8 and T1. The intrinsic muscles of the hand are covered by the fibrous palmar fascia which divides them into 4 main compartments. The thenar compartment located below the first digit known as the thumb the hypothenar compartment located below the fifth digit also known as the little finger the adductor compartment located in the lateral part of the hand and finally the central compartment thats found in the center of the palm.

The FLEXOR CARPI RADDIALIS muscle allows you to be able to blank_startbend blank_end your blank_startarm blank_end at the blank_startelbow blank_end. The tendons in the hand include the superficialis tendons the extensor tendons the flexor tendons the extensor pollicis brevis the pollicis longus and the profundus tendons. Tendons attach the bones to the muscles of the hand and arm.

The muscles which move the thumb and fingers are located in the forearm above the wrist.