PALMAR ASPECT OF HAND Flashcards
What are the intrinsic muscles of hand?
Thenar eminence- abductor pollicis brevis
flexor pollics brevis
opponens pollicis
Hypothenar eminence- flexor digiti minimi brevis
abductor digiti minimi
opponens digiti minimi
Adductor- adductor pollicis
4 lumbricals
4 palmar interossei
4 dorsal interossei
ABDUCTOR POLLICIS BREVIS
origin-flexor retinaculum (+tubercle of scaphoid and crest of trapezium)
insertion- lateral border of proximal phalanx of 1st digit
nerve-recurrent branch of median nerve
action- abduction of thumb
FLEXOR POLLICIS BREVIS
origin-flexor retinaculum (+tubercle of scaphoid and crest of trapezium and capitate)
insertion- lateral border of proximal phalanx of 1st digit
nerve-recurrent branch of median nerve
action- flexes metacarpophalangeal joint
OPPONENS POLLICIS
origin-flexor retinaculum and crest of trapezium
insertion-lateral surface of metacarpal of thumb
nerve- recurrent branch of median nerve
action-opposes thumb towards fingers
ADDUCTOR POLLICIS
origin- oblique head- bases of 2nd and 3rd metacarpal
transverse head- shaft of 3rd metacarpal
insertion-medial aspect of proximal phalanx of thumb
nerve- recurrent branch of median nerve
action- adduction of thumb
ABDUCTOR DIGITI MINIMI
origin-pisiform
insertion-base of proximal phalanx of little finger
nerve- deep branch of ulnar nerve
action- abduction of little finger
FLEXOR DIGITI MINIMI BREVIS
origin-flexor retinaculum
insertion-base of proximal phalanx of little finger
nerve- deep branch of ulnar nerve
action- flexion of little finger
OPPONENS DIGITI MINIMI
origin-flexor retinaculum
insertion-medial border of 5th metacarpal
nerve- deep branch of ulnar nerve
action- pulls fifth metacarpal as in cupping in the palm
PALMAR BREVIS
subcutaneous muscle covering the hypothenar region
origin-flexor retinaculum
insertion-skin of palm on medial side
nerve-superficial branch of ulnar nerve
action-wrinkles skin to improve grip of palm and
