Hand Flashcards
Lumbricals origin
Tendons of the flexor digitorum profundus. 1st: radial side of the tendon of the index finger 2nd: radial side of the tendon of the middle finger 3rd: tendons of the middle and ring fingers 4th: tendons of the ring and little fingers
Lumbricals insertion
Radial side of the extensor hood of the corresponding finger
Lumbricals nerve supply
1st and 2nd lumbricals median n. 3rd and 4th lumbricals ulnar n. C8, T1
Lumbricals function
Flexion of the MCP jts 2-5, extension of the PIP and DIP jts 2-5
Palmar interossei origin
Palmar surface of MC bones 2,4,5 1st: ulnar side of the 2nd MC bone 2nd: radial side of the 4th MC bone 3rd: radial side of the 5th MC bone
Palmar interossei insertion
1st: ulnar side of the base of the prox phalanx and the extensor hood of the 2nd digit 2nd: radial side of the base of the prox phalanx and the extensor hood of the 4th digit 3rd: radial side of the base of the prox phalanx and the extensor hood of the 5th digit
Palmar interossei nerve supply
Ulnar n. C8, T1
Palmar interossei function
Adduction and flexion of the 2nd, 4th, 5th MCP jts; extension of the PIP and DIP jts of digits 2, 4, 5
Dorsal interossei origin
By 2 heads from adjacent MC bones
Dorsal interossei insertion
1st: radial side of the proximal phalanx and the extensor hood of the 2nd digit 2nd: radial side of the proximal phalanx and the extensor hood of the 3rd digit 3rd: ulnar side of the proximal phalanx and the extensor hood of the 3rd digit 4th: ulnar side of the proximal phalanx and the extensor hood of the 4th digit
Dorsal interossei nerve supply
Ulnar n. C8, T1
Dorsal interossei function
Abduction and flexion of the 2nd, 3rd, and 4th MCP jts; extension of the PIP and DIP jts of digits 2, 3, and 4
Flexor digitorum superficialis origin
Humeroulnar head: medial epi of the humerus via the common flexor tendon, the ulnar collateral ligament of the elbow; the coranoid process of the ulna Radial head: anterior surface of the radius
Flexor digitorum superficialis insertion
Via 2 slips into the sides of the middle phalanx of digits 2-5
Flexor digitorum superficialis nerve supply
Median n. C7, C8, T1
Flexor digitorum superficialis function
Flexion of the PIP jts of digits 2-5; assists in flex of the MCP jts of digits 2-5 and the wrist
Flexor digitorum profundus origin
Upper ¾ of the ulna, the coronoid process of the ulna, interosseous membrane
Flexor digitorum profundus insertion
Base of the distal phalanges of digits 2-5
Flexor digitorum profundus nerve supply
Median and ulnar n. C8, T1
Flexor digitorum profundus function
Flexion of the DIP jts of digits 2-5; assists in flexing the PIP and MCP jts of digits
Extensor digitorum origin
Lateral epicondyle of the humerus via the common extensor tendon
Extensor digitorum insertion
Middle and distal phalanges of digits 2-5 via the extensor hood or expansion
Extensor digitorum nerve supply
Deep radial n. C6-8
Extensor digitorum function
Extension of digits 2-5; assists in wrist extension
Extensor indicis origin
Posterior surface of the ulna; interosseous membrane
Extensor indicis insertion
Extensor hood of the index finger
Extensor indicis nerve supply
Deep radial n. C6-8
Extensor indicis function
Extension of the index finger; assists in wrist extension
Extensor digiti minimi origin
lateral epicondyle of the humerus via the common extensor tendon; intermuscular septa
Extensor digiti minimi insertion
Extensor hood on the dorsum of the proximal phalanx of digit 5
Extensor digiti minimi nerve supply
Deep radial n. C6-8
Extensor digiti minimi function
Extension of digit 5; assists in wrist extension
Abductor digiti minimi origin
Pisiform bone and the tendon of the flexor carpi ulnaris
Abductor digiti minimi insertion
Ulnar side of the base of the proximal phalanx of the 5th digit; aponeurosis of the extensor digiti minimi
Abductor digiti minimi nerve supply
Ulnar nerve C8-T1
Abductor digiti minimi function
Abduction and flexion of the 5th MCP joint
Flexor pollicis brevis origin
Flexor retinaculum, trapezium, trapezoid and capitates
Flexor pollicis brevis insertion
Radial side of the base of the proximal phalanx of the thumb
Flexor pollicis brevis nerve supply
Median and ulnar n. C8-T1
Flexor pollicis brevis function
Flexion of the MCP of the thumb
Flexor pollicis longus origin
Anterior aspect of the radius, the coronoid process of the ulna, and the interosseous membrane
Flexor pollicis longus insertion
Base of the distal phalanx of the thumb
Flexor pollicis longus nerve supply
Anterior interosseous (median) n. C8, T1
Flexor pollicis longus function
Flexion of the IP joint of the thumb; assists in flexion of the MCP joint of the thumb
Extensor pollicis brevis origin
Posterior aspect of the radius; the interosseous membrane
Extensor pollicis brevis insertion
Base of the proximal phalanx of the thumb
Extensor pollicis brevis nerve supply
Deep radial n. C6, C7
Extensor pollicis brevis function
Extension of the MCP and CMC joints of the thumb
Extensor pollicis longus origin
Dorsolateral surface of the ulna; interosseous membrane
Extensor pollicis longus insertion
Base of the distal phalanx of the thumb
Extensor pollicis longus nerve supply
Deep radial n. C6-8
Extensor pollicis longus function
Extension of the IP jt of the thumb; assists in extending the MCP and CMC joints of the thumb
Abductor pollicis longus origin
Posterior surface of the ulna and radius; interosseous membrane
Abductor pollicis longus insertion
Radial side of the base of the 1st MC bone
Abductor pollicis longus function
Deep radial n.C6,C7
Abductor pollicis longus function
Abduction and extension of the CMC joint of the thumb; assists in abduction (radial deviation) and flexion of the wrist
Abductor pollicis brevis origin
Flexor retinaculum; scaphoid, trapezium
Abductor pollicis brevis insertion
Radial side of the base of the proximal phalanx of the thumb
Abductor pollicis brevis nerve supply
Median n. C8, T1
Abductor pollicis brevis function
ABduction of the CMC and MCP joints of the thumb
Adductor pollicis origin
Oblique head: capitates, trapezoid, trapezium, MC 1-4 Transverse head: palmar surface of the 3rd MC bone
Adductor pollicis insertion
Ulnar side of the base of the proximal phalanx of the thumb
Adductor pollicis nerve supply
Ulnar n. C8, T1
Adductor pollicis function
Adduction of the thumb
Opponens pollicis origin
Flexor retinaculum, trapezium bone
Opponens pollicis insertion
Radial side of the 1st MC
Opponens pollicis nerve supply
Median n. C8, T1
Opponens pollicis function
Opposition at the CMC jt of the thumb
Opponens digiti minimi origin
Flexor retinaculum; hook of the hamate
Opponens digiti minimi insertion
Ulnar side of the 5th MC
Opponens digiti minimi nerve supply
Ulnar n. C8, T1
Opponens digiti minimi function
Opposition at the CMC joint of the 5th digit
