Lateral neck
C3
Over clavicle
C4
Lateral upper arm (deltoid insertion)
C5
Thumb
C6
Middle finger (dorsal side)
C7
Medial border of hand; little finger
C8
Medial forearm
T1
Medial upper arm close to axilla
T2
Anterior groin
L1
Middle to upper anterior thigh
L2
Middle to lower medial thigh
L3
Medial aspect of foot to great toe
L4
Central dorsum of foot to middle toe
L5
Lateral aspect of foot and ankle
S1
Middle to posterior thigh (posterior calf)
S2