CERVICAL PLEXUS

C1-C5 and innervates the neck and extends into the thoracic cavity controlling the diaphragm.

BRACHIAL PLEXUS

C4, C5, and T1 and innervates the pectoral girdle and upper limbs.

LUMBAR PLEXUS

T12 and L1-L4 and innervates the pelvic girdle

SACRAL PLEXUS

L4, L5, and S1-S4 and innervates the lower limbs and bladder functions.