muscles/nerve supplies

Question 1

supraspinatus

Answer 1

stabilization and assists in abduction
innervation: suprascapular nerve (C5,C6)
empty can
drop arm test

Question 2

infraspinatus

Answer 2

stabilization and external rotation
innervation: suprascapular nerve (C5,C6)
infraspinatus test
external rotation lag sign

Question 3

subscapularis

Answer 3

stabilization and internal rotation, weakly assist adduction
innervation: subscapular nerve (C5,C6,C7)
lift off test
belly press test
internal rotation lag sign

Question 4

teres minor

Answer 4

stabilization and external rotation, weak adduction
axillary nerve (C5,C6)
horn-blowers sign

Question 5

triceps

Answer 5

elbow extension
radial nerve (C6,C7,C8)

Question 6

serratus anterior

Answer 6

scapula protraction, upward rotation, assists with breathing by lifting ribs
long thoracic nerve (C5,C6,C7)

Question 7

gastrocs

Answer 7

plantar flexion at ankle, flexion at knee
sural nerve (S1,S2)

Question 8

tib ant

Answer 8

dorsiflexion at foot, inversion at ankle
peroneal nerve (L4,L5,S1)

Question 9

anterior compartment muscles/nerve suuply

Answer 9

tibialis anterior
extensor digitorum longus
extensor hallucis longus
peroneal tertius

deep peroneal nerve

Question 10

lateral compartment muscles/nerve supply

Answer 10

peroneus longus
peroneus brevis

superficial peroneal nerve

Question 11

superficial posterior compartment muscles/nerve supply

Answer 11

gastrocs
soleus
plantaris

sural nerve

Question 12

deep posterior compartment muscles/nerve supply

Answer 12

tib post
flexor hallucis longus
flexor digitorum longus
popliteus

tibial nerve