posterior forarm and hand Flashcards
what is the origin and insertion of the extensor digitorum?
o - lateral epicondyle off humerus
i - middle and distal phalanges of digits 1-4
what is the function of the extensor digitorum?
extension of wrist and digits (on proximal phalanges)
why does the extensor digitorum act principly on the proximal phalanges?
because the interossei and lumbricals mainly extende the middle and distal phalanges
what is the nerve and arterial supply to the extensor digitorum?
posterior interosseus nerveand interosseous recurrent and posterior interosseous arteries
what is the origin and insertion of the extensor digiti minimi?
o - lateral epicondyle
i - extensor expansion of 5th digit
what is the function of the extensor digiti minimi?
to extend the little finger (from a fist)
what is the nerve and artery supply of the extensor digiti minimi?
posterior interosseous nerve
interosseous recurrent artery
what is the interosseous nerve a continuation from?
the radial nerve
which muscle is the ectensor digiti minimi usually connected to?
the extensor digitorum
what is the origin and insertion of the abductor pollicis longus?
o - posterior surfaces of the ulna, radius and interosseous memb
i - first metacarpal
what is the function of the abductor pollicis longus?
to abduct and extend the thumb
which three muscles are in the superficial posterior layer of the arm?
extensor digitorum
extensor digiti minimi
abductor pollicis longus
what is the origin and insertion of the aconeus?
o - lateral epicondyle of humerous
i - posterior surface of ulna
