Nerve entrapment Flashcards
Ulnar nerve intrapment
prox to distal:
arcade of struthers- may cause ulnar or median nerve symptoms
above he elbow- medial intermuscular septum or arcade of sruthers
medial condyle- enters the cubital tunnel between the two heads of flx carpi ulnaris
guyon’s canal-wrist
Median nerve entrapment
lig of struthers pronator teres syndrome-compress of median nerve as it passes through the pronator teres muscle
bicipital aponeurosis
fascia (arch) of the flexor digitorum superficialis
carpal tunnel (writ)
Pronator teres sydrome
pain inc by resisted pronation
pain with palpation in pronn teres area
weakness in muscles supplied by the median nerve
dysesthesia in hand- 2nd and third digits
Anterior interosseus syndrome
weakness only in muscle supplied by AIN= FPL, PQ, FDP
OK sign-unable (weakness of flexor pollicis longus)
Radial nerve entrapment
deep branch of radial nerve is compressed in the forearm
pain and occasionaly weakness in the most distally supplied muscle of the radial nerve
no sensory loss!
S/S- tenderness over the lateral epicondyle or radial head
Radial nerve entrapment commonly used tests
compression over the radial tunnel
long finger test
wrist EXT
resisted supination
cuff test
Superficial radial nerve
sens loss in the distribution of the superficial radial nerve w/o evident problems with the radial nerve
compression of sup rad nerve emerges beneath the brachioradialis muscle and enters fascia
sensory only!
Saturday night palsy
compression injury in the portion of the radial nerve between the radio spiral groove and lateral intermuscular septum
severe compression of the radial nerve in the region of the post aspect of the humerus
s/s- weakness in triceps and loss of function of the wrist, finger, and thumb extensors
sens loss- depends on level of injury. above SRN=sens loss in rad nerve distribution, below SRN= loss of wrist ext but no loss of sensation
