C4 - M
shoulder shrug
C5 - M
shoulder abduction, external rotation + elbow flexion
C6 - M
wrist extension
C7 - M
elbow extension + wrist flexion
C8 - M
thumb extension + finger flexion
T1 - M
finger abduction
L2 - M
hip flexion
L3 - M
knee extension
L4 - M
ankle dorsiflexion
L5 - M
great toe extension
S1 - M
ankle plantarflexion
S4 - M
bladder + rectum motor supply