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nedi
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Upper trunk:?
Lesioned by trauma
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Axillary nerve?
- Lesioned by fracture of surgical
- neck; dislocation of
- the humerus; intramuscular
- injections
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Radial Nerve in Sprial Groove?
Lesioned by midshaft fracture of humerus
-
Radial nerve
- (deep branch)?
- Stretched by subluxation
- of radius
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Recurrent branch of median nerve?
- Lesioned by
- superficial
- laceration
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Ulnar nerve?
- Lesioned by trauma to heel of the hand;
- fracture of hook of hamate
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Median nerve:Wrist?
- Compressed in carpal tunnel syndrome
- and by dislocated lunale
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Anterior interosseous nerve?
Compressed in deep forearm
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Ulnar at Elbow?
- Fracture of medial epicondyle or
- repeat minor trauma
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Median Nerve at elbow:
- compressed by supracondylar fracture of humuerus;
- Pronator teres syndrome
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Radial nerve:Shoulder?
Crutch/ Sat Night
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Lower trunk of
- brachial plexus?
- Compressed by cervical rib
- 1 or by Pancoast tumor of lung;
- i leads to Klumpke's palsy
-
C7 root?
- Compressed by
- cervical disk les1on
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Axillary Deficits and Signs?
- M:Deltoid-arm
- abduction at shoulder
- S: Over deltoid muscle
- Sign:Atroph ied deltoid
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Radial (CS-Tl) Deficits and Signs?
- m:"BEST extensors"Brachiorad
- ial is,
- Extensors of
- wrist and fingers,
- Supinator, Triceps
- s:Posterior arm and
- dorsal hand and
- thumb
- sign: Wrist Drop
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Median (CS-CB, Tl) Deficits and Signs?
- m:Opposition of thumb
- Lateral fi nger flexion
- Wrist flexion
- s:Dorsal and palmar
- aspects of lateral
- 3 1/z fingers, thenar
- em mence
- sign:Ape hand"; " Pope's
- blessing" ( hand)
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Ulnar (CB, Tl) Deficits and Signs?
- m:Medial fi nger flexion
- Wrist flexion
- s:Medial 1 1/z fi n gers,
- hypothenar
- emmence
- sign:Radial deviation of
- wrist upon wrist
- flexion
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Musculocutaneous
- (CS-C7)Deficits and Signs?
- m:Biceps, brach ialis,
- coracobrachialis
- Flexion of arm at
- elbow
- s:Lateral forearm
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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.
- Findings : l i mb hangs by side (paralysis of
- abductors), medially rotated (paralysis of lateral
- rotators), forearm is pronated ( loss of biceps) .
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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
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Ulnar claw?
- 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.
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Median claw?
- 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.
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"Pope's blessing"?
- 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."
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"Ape hand"?
- Proximal median nerve lesion- loss of opponens poll icis muscle function -+ unopposable thumb
- (i nabil ity to abduct thumb) , hence "ape hand."
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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
- (C5-C7)
- Hand muscles
- Thenar
- Hypothenar
- eminence
- 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
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