Cranial part of accessory nerve supplies
Sternocleidomastoid
Trapezius
Levator scapulae
Levator palatini
Sternocleidomastoid and trapezius develop from branchial arch mesoderm and are supplied by spinal part of accessory nerve. 
Levator scapulae are supplied by a branch from dorsal scapular nerve and branches from C3, C4.