Upper Limb Flashcards
Nerve root for:
- musculocutaneous
- axillary
- musculocutaneous: C5-7
- axillary: C5-6
Nerve root for:
- radial
- median
- ulnar
- radial + median: C5-T1
- ulnar: C7-T1
Sensory territory of:
- musculocutaneous
- axillary
musculocutaneous: lateral forearm
axillary: lateral arm/skin over deltoid
Sensory territory of radial nerve:
- posterior arm + forearm
- dorsum of lateral three digits
Median and ulnar sensory territories are only in the:
hand
Muscles innervated by the musculocutaneous
- coracobrachialis
- biceps brachii
- brachialis
Axillary: muscles innervated
- delt
- teres minor
Two pathologies assc with axillary nerve
- surgical neck of humerus
- anterior shoulder dislocation
Muscles innervated by the radial nerve:
- triceps
- forearm extensors
- APL, EPL, EPB, EI
Median nerve: muscles innervated
- most forearm flexors
- thenar muscles
- lateral two lumbricals
What are the three thenar muscles?
-APB, FPB, opponens pollicis
2 Radial nerve pathologies:
- wrist drop
- Saturday night palsy
- midshaft fracture of humerus
Median nerve assc pathologies (3)
- supracondylar fracture
- wrist laceration
- carpal tunnel
-2 Pathologies assc with ulnar nerve
fracture of medial condyle
fracture of hook of hamate
Innervation of rhomboids
-dorsal scapular nerve (C5)
Brachioradialis:
specific innervation
-muscular branches of radial nerve
FCR specific innervation
anterior interosseous nerve (median)
interossei specific innervation
deep branch of ulnar
APB specific innervation
recurrent branch of median
Actions of rhomboids
retract and rotate scapula
Deltoid actions
- anterior: flex at shoulder
- middle: abduct
- posterior: extend at shoulder
FCR actions
-flexion + abduction at wrist
Interossei functions
- abducts fingers
- flexes mcp, extends PIP
Sensation to medial forearm
medial antebrachial cutaneous (C8,T1)
Branches of the posterior cord?
axillary + radial
Branches of medial cord?
-median + ulnar
Branches of lateral cord?
-median + musculocutaneous
Only nerve receiving no input from upper trunk?
-ulnar
