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Palmaris brevis muscle tenses the skin of the palm on the ulnar side during a grip action. [2][3] It also deepens the hollow of the palm. [5] The palmaris brevis may protect the ulnar nerve and ulnar artery from compressive forces during repetitive grasping actions. [6] The muscle has a fatigue-resistant fiber type profile, which supports the ...
Flexor pollicis brevis muscle. Superficial muscles of the left hand, palmar view. The flexor pollicis brevis is a muscle in the hand that flexes the thumb. It is one of three thenar muscles. [1][2] It has both a superficial part and a deep part.
Structure. The abductor pollicis brevis is a flat, thin muscle located just under the skin. It is a thenar muscle, and therefore contributes to the bulk of the palm's thenar eminence. It originates from the flexor retinaculum of the hand, the tubercle of the scaphoid bone, and additionally sometimes from the tubercle of the trapezium.
Hypothenar eminence. The mucous sheaths of the tendons on the front of the wrist and digits. (Hypothenar eminence labeled at center right.) Transverse section across the wrist and digits. (Muscles of little finger labeled at upper right.) The hypothenar muscles are a group of three muscles of the palm that control the motion of the little finger.
The mobile wad (or mobile wad of Henry) is a group of the following three muscles found in the lateral compartment of the forearm: [1] brachioradialis. extensor carpi radialis brevis. extensor carpi radialis longus. It is also sometimes known as the "wad of three", [2] "lateral compartment", [3] or "radial group" [4] of the forearm.
Deep palmar nerves. In the palm of the hand the median nerve is covered by the skin and the palmar aponeurosis, and rests on the tendons of the flexor muscles. Immediately after emerging from under the transverse carpal ligament the median nerve becomes enlarged and flattened and splits into a smaller, lateral, and a larger, medial portion. The ...
The superficial muscles have their origin on the common flexor tendon. [2] The ulnar nerve and artery are also contained within this compartment. [2] The flexor digitorum superficialis lies in between the other four muscles of the superficial group and the three muscles of the deep group. This is why it is also classified as the intermediate ...
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.