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Upper Limb 5: Hand - UNC MS1 Anatomy
Upper Limb 5: Hand - UNC MS1 Anatomy
17
Anatomy
Graduate
10/28/2011

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Term
name the carpal bones starting on the radial, proximal side
Definition
scaphoid, lunate, triquetrum, pisoform, trapezium, trapezoid, capitate, hamate (some lovers try positions that they can't handle)
Term
what is the most commonly fractured carpal bone?
Definition
scaphoid
Term
what is the fascia on the palm of the hand called?
Definition
palmar aponeurosis
Term
what is trigger finger?
Definition
trauma to flexor tendons, causing scar tissue and then a nodule that catches
Term
what are the palmar hypothenar muscles?
innervated by?
Definition
abductor digiti minimi, flexor digiti minimi brevis, opponens digiti minimi.
all innervated by the deep ulnar nerve
Term
what are the palmar thenar muscles?
innervated by?
Definition
abductor pollicis brevis, flexar pollicis opponens pollicis (all innervated by the recurrent branch of the median nerve) and the adductor pollicis (innervated by the deep branch of the ulnar nerve)
Term
lumbricals, where are how many?
innervation and function
Definition
small, intrinsic hand muscles that arise from the sides of FDP tendons (4)
innervated by median (lateral 2) and ulnar nerve (medial 2)
serve as bye-bye muscles; flex the MCP joint and extend the interphalangeal joint
Term
palmar interossei, function and innervation
Definition
adduct digits to the axial line and are innervated by the deep branch of the ulnar nerve
Term
dorsal interossei, function and innervation
Definition
abduct digits away from the axial line; are innervated by the deep branch of the ulnar nerve
Term
what passes through the carpal tunnel
Definition
9 long flexors and one median nerve
flexor digitorum superficialis (FDS), flexor digitorum profunda (FDP), flexor pollicis longus
Term
what part of the median nerve is not affected by carpal tunnel impingement?
Definition
palmar carpal branch of the median nerve
Term
what does the median nerve do in the hand?
Definition
gives off the recurrent branch to the thenar muscles, motor innervates the 1st and 2nd lumbricals, gives off common and proper digital nerves that innervate 3.5 digits
Term
what does the ulnar nerve do in the hand?
Definition
deep branch innervates almost all the intrinsic hand muscles (fine motor) and the superficial branch gives common/proper to supply sensation for 1.5 digits
Term
superficial palmar arch
Definition
mainly formed by ulnar artery
Term
deep palmar arch
Definition
mainly formed by radial artery
Term
what is the distribution of teh ulnar/radial arterial perfusion of digits?
Definition
3.5 medial --> ulnar
1.5 lateral --> radial
Term
intrinsic muscles of the hand are innervated by what nerve roots?
Definition
C8 and T1
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