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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. The intrinsic group are the smaller muscles located within the hand itself. The muscles of the hand ...
The thenar eminence is the mound formed at the base of the thumb on the palm of the hand by the intrinsic group of muscles of the thumb. [1] The skin overlying this region is the area stimulated when trying to elicit a palmomental reflex. The word thenar comes from Ancient Greek θέναρ (thenar) 'palm of the hand'. [2]
The muscles of the thumb are nine skeletal muscles located in the hand and forearm. The muscles allow for flexion, extension, adduction, abduction and opposition of the thumb. The muscles acting on the thumb can be divided into two groups: The extrinsic hand muscles, with their muscle bellies located in the forearm, and the intrinsic hand ...
Superficial palmar arch, common palmar digital arteries, deep palmar arch, dorsal digital artery: Nerve: Third and fourth deep branch of ulnar nerve, first and second median nerve: Actions: Flex metacarpophalangeal joints, extend interphalangeal joints: Identifiers; Latin: musculi lumbricales manus: TA98: A04.6.02.065: TA2: 2532: FMA: 37385 ...
The palmar interosseous muscles adduct the fingers towards the middle finger. This is in contrast to the dorsal interossei , which abduct the fingers away from the middle finger. In addition (like dorsal interossei ) they flex the finger at the metacarpo-phalangeal joint and extend the finger at the interphalangeal joint and thus assist the ...
The intrinsic muscles of hand can be remembered using the mnemonic, "A OF A OF A" for, Abductor pollicis longus, Opponens pollicis, Flexor pollicis brevis, Adductor pollicis (thenar muscles) and Opponens digiti minimi, Flexor digiti minimi, Abductor digiti minimi (hypothenar muscles). Reason very informative Articles this image appears in Hand ...
The lateral and medial portions of the palmar aponeurosis are thin, fibrous layers, which cover, on the radial side, the muscles of the ball of the thumb, and, on the ulnar side, the muscles of the little finger; they are continuous with the central portion and with the fascia on the dorsum of the hand.
As the fingers are being flexed, palmar cupping is contributed to by muscles crossing the carpometacarpal joints when they act on the mobile parts of the palmar arch system. The oblique opponens digiti minimi muscle of hand acts on the fifth carpometacarpal joint and is the only muscle that act on the carpometacarpal joints alone. It is ...