ant forearm Flashcards
what is the main inv of the ant forearm
Median (ulnar has 1.5 digit inv)
muscles in 1st layer
- pronator teres
- flexor carpi radialis
- palmaris l
- flexor carpi ulnaris
muscle in 2nd layer
flexor digitorum superficialis
muscles in 3rd layer
flexor digitorum profundus
flexor pollicis longus
muscles in 4th layer
pronator teres
what is the only muscle that flexes distal interpharengeal j
flexor digitorum profundus
how to test the interosseus n
doing OK sign
what nerve adheres to the deep surface of the flexor digitorum superficialius
Median n
where can the median nerve be impinged prox in the ant forearm
bw humeral and ulnar head of pronator teres
path of ulnar n
post to med epicondyle and enter aponeurotic arch btw two heads of FCU (common for impingment)
- then emerges lat to FCU
- goes med to pisiform and spliys to deep and superficial ulnar n
before median nerve travels in carpal tunnel what brach does it send over it to the palm
palmar branch
the radial artery is lat to what tendon
flexor carpi radialis tendon
contents of carpal tunnel med to lat
FDS, FDP, Median n, fPL
is the ulnar n med or lat to ulnar artery
med
where do u take the pulse from the radial artery
medial to termination of the brachioradialis muscle
before entering the carpal tunnel the median n will send this branch
palmar cutaneous branch to supply the skin of palm of the hand
if the median n is compressed in carpal tunnel would skin be affected
no
what does the palmar cutnatous branch of median n supply
supply skin over prox 3/4 central palm as far as 4th metacarpal
med to lat- things on outside of carpal tunnel- palmar surface
ulnar n, ulnar a, palmaris longus, superficial palmar br of radial a
what is a variation of the brachial artery
high division in arm pit area
where does strunthers lig run from and what can it compress
surpracondylar process and med epicondyle
median n
where does the arcade of strunthers run and what can it compress
med head of tri to med intramuscular septim
Ulnar n
5 sites of entrapment of ulnar n
- Mid arm (as it perforates fascia)
- Post arm (arcade of strunthers)
- Post to med epicondyl
- Flexor carpi ulnaris
- Ulnar gunyons canal
5 sites of entrapment of median n
- strunthers lig
- bicipital apponeurosis
- bw 2 heads of pronator teres
- passing under FDS
- carpal tunnel
Sensory and motor deficiencies in Ulnar n compression by FCU
sensory- paresthesis in palmar and dorsal 4/5th digits
Motor- weakend flex, adduction of wrist, difficulty making fist
sensory and motor deficiencies in ulnar n compression by guyons canal
sensory- only superficial ulnar n affected distal 4/5 digits
motor- claw hand- atrophy from no supply of deep ulnar
pronator syndrome- what n is affected and how do u provocative it
median n
-pronating hand
motor deficits of pronator syndrome(3)
- flex of distal interphalangeal jts lost
- flex of metocarpopharangeal jts is affected
- thenal muscles fucntion lost
Anterior interosseus n palsy motor ddeficit
wont be able to make Okay sign (absense of flex of interpharangeal jt)
