Search results
Results From The WOW.Com Content Network
Palmaris brevis muscle is located on the ulnar side of the hand. [1] [2] It arises from the tendinous fasciculi from the transverse carpal ligament and palmar aponeurosis.The muscle fibres are inserted into the skin on the ulnar border of the palm of the hand, [1] and occasionally on the pisiform bone.
The intrinsic muscle groups are the thenar and hypothenar (little finger) muscles; the interossei muscles (four dorsally and three volarly) originating between the metacarpal bones; and the lumbrical muscles arising from the deep flexor (and which are special because they have no bony origin) to insert on the dorsal extensor hood mechanism.
This muscle is the most superficial of the thenar group. Flexor pollicis brevis , which lies next to the abductor, will flex the thumb, curling it up in the palm. (The flexor pollicis longus , which is inserted into the distal phalanx of the thumb, is not considered part of the thenar eminence.)
Ulnar nerve enters the palm of the hand via the Guyon's canal, superficial to the flexor retinaculum and lateral to the pisiform bone. [7] Here it gives off the following branches: [8] Superficial branch of ulnar nerve - supplies the palmaris brevis and gives digital branches to the medial one and a half fingers. [7]
A hand is a prehensile, multi-fingered appendage located at the end of the forearm or forelimb of primates such as humans, chimpanzees, monkeys, and lemurs.A few other vertebrates such as the koala (which has two opposable thumbs on each "hand" and fingerprints extremely similar to human fingerprints) are often described as having "hands" instead of paws on their front limbs.
The lumbricals are four, small, worm-like muscles on each hand. These muscles are unusual in that they do not attach to bone. Instead, they attach proximally to the tendons of flexor digitorum profundus , [ 1 ] [ 2 ] [ 3 ] and distally to the extensor expansions .
On the radial side of the retinaculum is the tendon of the flexor carpi radialis, which lies in the groove on the greater multangular between the attachments of the ligament to the bone. The tendons of the palmaris longus and flexor carpi ulnaris are partly attached to the surface of the retinaculum; below, the short muscles of the thumb and ...
The five muscles acting on the wrist directly — flexor carpi radialis, flexor carpi ulnaris, extensor carpi radialis, extensor carpi ulnaris, and palmaris longus — are accompanied by the tendons of the extrinsic hand muscles (i.e. the muscles acting on the fingers). Thus, every movement at the wrist is the work of a group of muscles ...