forearm muscles (posterior and lateral) Flashcards
brachioradialis origiin
proximal 2/3 of the lateral supracondyler ridges of the humerus
insertion of brachioradialis
lateral surface of he distal end of the radius
innervation of brachioradialis
radial nerve
action of brachioradialis
flexes the forearm in midprone position
origin of extensor carpi radilias longus
lateral supracondyler ridge of the humerus
insertion of extensor carpi radialis longus
base of the 2nd metacarpal
nerve supply of extenosr carpi radialis longus
radial nerve
action of extensor carpi radialis longus
extends and abducts the hand at teh wrist joint
origin of extensor carpi radilais brevis
lateral epicondyle of teh humerus
insterion of extensor carpi radialis brevis
base of the 3rd metacrapal or between teh 2nd and the 3rd
action of extensor carpi radilais brevis
extends and abducts the hand at the wrist joint
nerve supply of extensor carpi radilais brevis
deep branch of radial nerve
extensor digitorum origin
lateral epicondyle of the humerus
extensor digitirum insertion
extensor expansion to the middle four digits
action of extnsor digitorum
extends hand at the wrist joint
extends tthe medial four fingers and metacarpophalangeal joints
nerve supply of extensor digitorum
deep branch of radial nerve
extensor digiti minimi origin
lateral epicondyle of the humerus
extensor digiti minimi insertion
extensor expansion of the 5th digit
nerve suppply of extensor digiti minimi
deep branch of radial nerve
nerve suppply of extensor digiti minimi
deep branch of radial nerve
action of extensor digiti minimi
extends the 5th digit at metcarpophalangeal and interphalangeal joints
extensor carpi ulnaris origin
lateral epicondyle of teh humerus ans posterior border of ulna
extensor carpi ulnaris insertion
base of the 5th metacarpal
extensor carpi ulnaris nerve supplu
deep branch of radial nerve
extensor carpi ulnaris action
extends and aducts the hand at teh wrist joint
abductor pollicis longus origin
posterior surface of ulna , radius and interosseuos membrane
abductor pollicis longus insertion
base of he 1st metacrpal
action of abductor pollicis longus
abduction of the thumb and extends it at carpometacpal jonts
innervation abductor pollicis longus
deep branch of radial nerve
extensor pollicis brevis origin
posterior surface of radius and interosseous membrane
extensor polllicis brevis insertion
base of the proximal phalanx of the thumb
action of extensor pollicis brevis
extends the proximal phalanx at carpometacrapal joints
innervation of extensor polllicis brevis
deeo branch of radial nerve
extensor pollicis longus origin
posterior surface of ulna and interosseous membrane
ectensor poliicis longus insertion
base of distal phalanx of the thumb
action of extensor pollicis longus
extends distal phalanx of the thumb at carpometacarpal joints and interphalangeal joints
innervation of extensor pollicis longu s
deep branch of radial nerve
extensor indics origin
posterior surface of ulna and interosseous membrane
extensor indics isnertion
extensor expansion of the 2nd digit
action of extensor indics
extends teh second deigita nd helps extend the hand
innervation of extensor indics
deep branch of radial nerev
superior group muscles are
anconeous and supinator
superior group innervation
radial nerve
anconeous is superficial or deep to supinator?
superficial
supinator is superficial or deep to anconeous?
deep
anconeous origin
posterior sur face of the shaft of the humerus and lateral epicondyle
anconeous insertion
olecarnon process
action of anconeus
it extends teharm at the elbow joint
supiinator action
it suoinates teh forearm at radioulnar joints
supinator origin
lateral epicondyel of teh humerus and supinator crest of ulna
supinator insertion
midpoint of teh lateral side of the shaft of radius
what is the flexor retinaculum
its is a thickening of deep fascia that ataches teh tendons of the long felxors in position with the wrist
what is the flexor retinaculum
its is a thickening of deep fascia that ataches teh tendons of the long felxors in position with the wrist
it is attached mediall by
pisiforma sn hook of hamate
it is attached laterally by
scaphoid and trapezium
what tendosna re attached to ots anterior surface? flexor retinaculum
flexor carpi ulnars and palamris longus
teh anatomyof the carpal tunnel
the anterior concave of the carpal bones forma bony gutter and the flexor retinaculum converts itinto a tunnel
contens of the carpal tunnel
median nerve
the 4 tendons of the flexordigitorum superficials and profundus andthe flexor pollicis longus tendon
structures that pass superficially to the flexor retinaculum
ulnar nerve
ulnar arteries
flexor carpi ulnaris tendon
palmar cutaneous branch of ulnar nerve
palamar cutaneous branch of median nerve
palamaris longus tendon (if present)
median nerve journey in the hand
it immediatly divides into lateral and medial branches
the muscular branch supplies teh thernar eminence muscle and the first two lumbricals
the cutaneous nerve the palmar aspect
pf the lateral 3 and 1/2 fingers and dorsally the distal half of teh all of those fingers
carapal tunnel syndrome
it is caused by he median nerve being compressed as it passes through the carpal tunnel behind the flexor retinaculum
what hand is usually affected first with carpal tunel syndome
the dominant one
sypmtoms of carpal tunnel syndrome
pain ,paratheia, numbness of the thumb, index, mddle and the medial side of the ring finger . it is worse at night and at gripping objects
sypmtoms of carpal tunnel syndrome
pain ,paratheia, numbness of the thumb, index, mddle and the medial side of the ring finger . it is worse at night and at gripping objects
why does no parathesia occur with the thenar eminence muscle
the palmar cutaneous branch of teh median nerve supplies it and it passes superficially to the flexor retinaculum
