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Palmar surface. (first lumbricalis labeled at bottom right of muscular group) The lumbricals are intrinsic muscles of the hand that flex the metacarpophalangeal joints, [1] and extend the interphalangeal joints. [1][2] The lumbrical muscles of the foot also have a similar action, though they are of less clinical concern.
The lumbricals arise from the tendons of the flexor digitorum longus muscle, [1] as far back as their angles of division, each springing from two tendons, except the first. The first lumbrical is unipennate, while the second, third and fourth are bipennate. The muscles end in tendons, which pass forward on the medial sides of the four lesser ...
The muscles of the hand are the skeletal muscles responsible for the movement of the hand and fingers. The muscles of the hand can be subdivided into two groups: the extrinsic and intrinsic muscle groups. The extrinsic muscle groups are the long flexors and extensors. They are called extrinsic because the muscle belly is located on the forearm.
FDP is shown in blue. The flexor digitorum profundus or flexor digitorum communis profundus[1] is a muscle in the forearm of humans that flexes the fingers (also known as digits). It is considered an extrinsic hand muscle because it acts on the hand while its muscle belly is located in the forearm. Together the flexor pollicis longus, pronator ...
Anatomical terms of muscle. [edit on Wikidata] In human anatomy, the adductor pollicis muscle is a muscle in the hand that functions to adduct the thumb. It has two heads: transverse and oblique. It is a fleshy, flat, triangular, and fan-shaped muscle deep in the thenar compartment beneath the long flexor tendons and the lumbrical muscles at ...
The interosseous muscles of the hand are muscles found near the metacarpal bones that help to control the fingers. They are considered voluntary muscles. They are generally divided into two sets: 4 Dorsal interossei - Abduct the digits away from the 3rd digit (away from axial line) and are bipennate. 3 Palmar interossei - Adduct the digits ...
The ulnar nerveis a nervethat runs near the ulna, one of the two long bones in the forearm. The ulnar collateral ligament of elbow jointis in relation with the ulnar nerve. The nerve is the largest in the human body unprotected by muscle or bone, so injury is common.[1] This nerve is directly connected to the little finger, and the adjacent ...
Anatomical terms of muscle. [ edit on Wikidata] The extensor digitorum muscle (also known as extensor digitorum communis) [ 2 ] is a muscle of the posterior forearm present in humans and other animals. It extends the medial four digits of the hand. Extensor digitorum is innervated by the posterior interosseous nerve, which is a branch of the ...