Card Set Information
Lesioned by trauma
Lesioned by fracture of surgical
neck; dislocation of
the humerus; intramuscular
Radial Nerve in Sprial Groove?
Lesioned by midshaft fracture of humerus
Stretched by subluxation
Recurrent branch of median nerve?
Lesioned by trauma to heel of the hand;
fracture of hook of hamate
Compressed in carpal tunnel syndrome
and by dislocated lunale
Anterior interosseous nerve?
Compressed in deep forearm
Ulnar at Elbow?
Fracture of medial epicondyle or
repeat minor trauma
Median Nerve at elbow:
compressed by supracondylar fracture of humuerus;
Pronator teres syndrome
Crutch/ Sat Night
Lower trunk of
Compressed by cervical rib
1 or by Pancoast tumor of lung;
i leads to Klumpke's palsy
cervical disk les1on
Axillary Deficits and Signs?
abduction at shoulder
: Over deltoid muscle
Sign:Atroph ied deltoid
Radial (CS-Tl) Deficits and Signs?
wrist and fingers,
s:Posterior arm and
dorsal hand and
: Wrist Drop
Median (CS-CB, Tl) Deficits and Signs?
m:Opposition of thumb
Lateral fi nger flexion
s:Dorsal and palmar
aspects of lateral
3 1/z fingers, thenar
sign:Ape hand"; " Pope's
blessing" ( hand)
Ulnar (CB, Tl) Deficits and Signs?
m:Medial fi nger flexion
s:Medial 1 1/z fi n gers,
sign:Radial deviation of
wrist upon wrist
(CS-C7)Deficits and Signs?
m:Biceps, brach ialis,
Flexion of arm at
Erb-Duchenne palsy ("walter's tip")?
Traction or tear of the upper trunk of the
brach ial plexus (C5 and C6 roots); seen i n
i n fants following trauma dur i n g del ivery.
: l i mb hangs by side (paralysis of
abductors), medially rotated (paralysis of lateral
rotators), forearm is pronated ( loss of biceps) .
Klumpke's palsy and thoracic outlet syndrome?
An embryologic or childbirth defect affecting inferior trunk of brach ial plexus ( C 8 , Tl ) ; a cervical
rib can compress subclavian artery and inferior trunk, resulting in thoracic outlet syndrom e :
Atrophy o f t h e thenar a n d hypothenar eminences
Atrophy of the interosseous muscles
Sensory deficits on the medial side of the forearm and hand
D isappearance of the rad ial pulse upon movi ng the head toward the ipsilateral side
Can be caused by long-standing injur y to ulnar nerve at hook of hamate (e.g., by fal l i n g onto
outstretched hand) . D istal ulnar nerve lesion -+ loss of medial lumbrical fu nction -+ inability to
extend 4th and 5th digits ( "clawing") when tryi ng to open the hand.
Can be caused by carpal tunnel syndrome or dislocated lunate. Distal median nerve lesion (after
branch conta i n i n g C 5-C7 branches off to feed forearm flexors) -+ loss of latera l l umbrical
function ; 2nd and 3rd digits are clawed upon attempted Finger extension.
Proximal median nerve lesion causes loss of lateral Finger flexion and thumb opposition . When
asked to make fist, 2nd and 3rd digits remain extended and thumb remains unopposed, which
looks l ike the hand of benediction or " Pope's blessing."
Proximal median nerve lesion- loss of opponens poll icis muscle function -+ unopposable thumb
(i nabil ity to abduct thumb) , hence "ape hand."
Klumpke's total claw?
Lesion of lower trunk ( C 8 , Tl) of brach ial plexus-+ loss of function of all lumbrica l s ; forearm
Long thoracic nerve
Finger fl exors (fed by part of median nerve with C 5 -C7) and Finger extensors (fed by radial nerve)
are unopposed -+ clawing of all digits