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The extrinsic muscles are located in the anterior and posterior compartments of the forearm. They control crude movements and produce a forceful grip. The muscles in the anterior compartment of the forearm are organised into three layers: Superficial: flexor carpi ulnaris, palmaris longus, flexor carpi radialis, pronator teres. Intermediate: flexor digitorum superficialis. Deep: flexor pollicis longus, flexor digitorum profundus and pronator quadratus. This muscle group […]

THE BRACHIAL PLEXUS The brachial plexus is a network of nerve fibres that supplies the skin and musculature of the upper limb. It begins in the root of the neck, passes through the axilla, and runs through the entire upper extremity. The plexus is formed by the anterior rami (divisions) of cervical spinal nerves C5, C6, C7 and C8, and the first

The intrinsic muscles of the hand are located within the hand itself. They are responsible for the fine motor functions of the hand. Thenar Muscles The thenar muscles are three short muscles located at the base of the thumb. The muscle bellies produce a bulge, known as the thenar eminence. They are responsible for the fine movements of

Bones Of the Hand The hand is composed of many different bones, muscles, and ligaments that allow for a large amount of movement and dexterity. There are 3 major types of bones in the hand itself, including: Phalanges: The 14 bones that are found in the fingers of each hand and also in the toes of each