1
CERVICAL PLEXUS
C1-C5 and innervates the neck and extends into the thoracic cavity controlling the diaphragm.
2
BRACHIAL PLEXUS
C4, C5, and T1 and innervates the pectoral girdle and upper limbs.
3
LUMBAR PLEXUS
T12 and L1-L4 and innervates the pelvic girdle
4
SACRAL PLEXUS
L4, L5, and S1-S4 and innervates the lower limbs and bladder functions.