Muscles by action Flashcards
5 Medial Rotation of humerus
- Teres major (C5,6) Lower subscapular nerve
- Pectoralis major (c5,6,7,8,t1)LP,MP
- Deltoid (c5,6) axillary
- Subscapularis (C5,6,7)- Upper and lower Subscapular n.
- Latissimus Dorsi
3 Lateral Rotation of humerus
- deltoid (5,6) axillary
- Teres Minor (5,6) axillary
- Infraspinatus (5,6) subscapular n.
Downward rotates scapula
- Rhomboids (c5) dsn
2. Levator Scapula (c5) dsn
Upward Rotates Scapula
- Serratus anterior (c5,6,7) LTN
ADDUCTS arm
- pectoralis major (all)
2. Teres Major (C5,6) Lower subscapular
ABDUCTS arm
- Supraspinatus (suprascapular nerve c5,c6)
2. deltoid (c5,c6) axillary
Musculocutaneous injury in axilla
Weak upper limb flexion
severe weak forearm flexion
weak supination from partially flexed position (biceps)
Radial n lesion fractured humerus in radial groove
Wrist drop
no forearm extension
Median n injury in axilla
Hand of benedict no pronation no digital and wrist flexion no palmar sensation can lead to ape hand
Radial n lesion at neck of radius (deep radial n)
Wrist drop (not as severe)
ECRL & ECRB OK
Lost extension at PIP of fingers and thumb
Median n injury at wrist/carpal tunnel syndrome
Thenar eminence wasting
Lost palmar sensation
pain in forearm
Medain n injury at wrist from distal radius fracture
Thenar eminence wasting
Still has palmar sensation
Ulnar n injury in Axilla, arm, or medial epicondylar fracture
Motor and sensory loss to hand Claw hand deformity no PADs DABS no flex/extend mp ip joints cant make a fist
Erb-Duchenne paralysis
7 muscles
C5/C6 root lesion
-Waiters tip deformity
-deltoid, biceps, brachialis ,brachioradialis, supraspinatus, infraspinatus, teres minor
Median nerve anterior interosseous syndrome
pinch sign– (cant make OK sign)
-ok skin sensation
Ulnar lesion at elbow
Claw Hand (partial)
no DIP flexion
No skin sensation to ulnar innervated areas
if sensation lost in forearm/arm then medial cord/inferior trunk lesion
Ulnar lesion at wrist
Claw Hand (partial)
ok DIP flexion
ok wrist flexion
ok skin sensation on dorsum of hand except distal 1.5 digits
Midshaft fracture of humerus
Wrist drop (radial n, profunda brachii)
Distal humerus fracture
ulnar n at medial epicondyle- Claw hand
median n & brachial artery- Hand of benediction
Radial lesion in axilla
crutch palsy
wrist drop
no skin sensation to lateral and posterior arm, posterior forearm, dorsum of hand
Radial lesion in arm
Saturday night palsy
wrist drop
no skin sensation to posterior forearm, dorsum of hand
No wrist extention
Radial lesion in forearm
radial deviation in wrist extention
ok cutaneous sensation
