Intrinsic Muscles Of The Hand Flashcards
(22 cards)
Abductor Pollicis Brevis action
Abduct the thumb, assist with opposition
Flexor Pollicis Brevis innervation
Recurrent branch of median
Abductor Pollicis Brevis innervation
Recurrent branch of median
Flexor Pollicis Brevis action
Flex the thumb at the MCP and CMC joints, aid in opposition
Opponens Pollicis innervation
Recurrent branch of median
Opponens Pollicis action
Opposition; draws thumb toward palm and rotates it medially
Abductor digiti minimi innervation
Deep branch of ulnar
Abductor digiti minimi action
Abducts little finger & helps flex MCP of little finger
Flexor digiti minimi innervation
Deep branch of ulnar
Flexor digiti minimi action
Flex MCP of little finger
Opponens digiti minimi innervation
Deep branch of ulnar
Opponens digiti minimi action
Draws the 5th MCP forward and rotates it laterally
Palmaris Brevis innervation
Superficial ulnar
Palmaris Brevis action
Wrinkles skin on medial aspect of Palm; deepens hollow of hand
Adductor pollicis innervation
Deep branch of ulnar
Adductor Pollicis action
Adductor thumb and assist in power grip by moving proximal phalanx of the thumb at the metacarpophalangeal joint and the first metacarpal at the first carpometacarpal joint
Lumbricals innervation
Lateral 2 = median
Medial 2 = deep ulnar
Lumbricals action
Flex the MCP & extend the IP joints of the medial 4 digits
Dorsal Interossei innervation
Deep ulnar
Dorsal interossei action
Abduction of index, middle and ring fingers and assist lumbricals
Palmar interossei innervation
Deep ulnar
Palmar Interossei action
Addiction of index, ring and little fingers and assist lumbricals
