Forearm/hand Flashcards
anterior superficial muscles
pronator teres
flexor carpi radialis
palmaris longus
flexor carpi ulnaris
anterior intermediate layer muscles
flexor digitorum superficialis
anterior deep layer muscles
flexor digitorum profundus
flexor pollicis longus
pronator quadratus
median nerve supply - ant muscles
PT FCR FDS FDP (lateral half) FPL PQ
ulnar nerve supply - ant muscles
FDP medial half
FCU
Pronator teres function
pronation
FCR & FCU function
flexion of the wrist
palmaris longus fxn
flexion of the wrist
flexor digitorum superficialis fxn
flexion of PIP (primary fxn)
flexion of MCP
flexion of wrist
flexor digitorum profundus fxn
flexion of DIP (primary function)
flexion of MCP
flexion of wrist
flexor pollicis longus fxn
flexion of IP of thumb
pronator quadratus fxn
pronation
extensor muscle innervation
radial N including brachioradialis (flexor)
brachioradialis fxn
flexion of elbow
extensor carpi radialis (longus and brevis), extensor carpi ulnaris fxn
extension of wrist
anconeus fxn
extension of elbow joint
supinator fxn
supination
snuffbox contents
scaphoid - more important
trapeziumradial artery
Median nerve course
leaves the cubital fossa with the brachial artery, enters forearmpasses through the carpal tunnel to enter the hand
Ulnar nerve course
passes posterior to the medial epicondyle, enters the forearmruns on the medial side of the forearm and wrist and enters the hand
ulnar nerve supply
flexor carpi ulnaris
medial half of flexor digitorum profundus
dorsal branch in the forearm - sensory innervation of the medial side of the dorsum of the hand
radial nerve course
Leaves the posterior compartment of the arm, enters cubital fossa and divides into deep and superficial branches
Deep: pierces supinator
superficial: skin of the lateral hand/digits
arteries of the forehand
ulnar (most)radial
ulnar artery supply
forms palmar arterial arches
supplies the majority of the forearm - the anterior and posterior compartments of forearm with radial artery
radial artery supply
mostly the lateral side of the forearmdistal part - passes through the anatomical snuff box, after passing through the first interosseous space in the hand, enters the palm of the hand and forms the deep palmar arch
Carpal bones
lateral to medial, proximal then distal scaphoid lunate triquetrium pisiform trapezium trapezoid capitate hamate
Carpal tunnel contents
9 tendons + median nerve
Intrinsic muscles of the hand
thenar, hypothenar and central muscles
Thenar muscles
abductor pollicis brevis
flexor pollicis brevis
opponens pollicis
thenar muscle N
median
Hypothenar muscles
palmar brevis
abductor digiti minimi
flexor digiti minimi brevis
opponens digiti minimi
Lumbrical fxn
tata movement
flexion of MCPs and extension of DIP & PIP
dorsal interossei function
abduction of digits (DAB)
hypothenar muscle N
ulnar
palmar interossei function
adduction of digits (PAD)
intrinsic muscle innervation
ulnar EXCEPT thenar and 1st and 2nd lumbrical (median)
Hand blood supply
ulnar: medial 3.5 fingers, superficial palmar arch
radial: lateral 1.5 fingers, deep palmar arch