Pure motor cranial nerve lecture note

Pure motor cranial nerve:  Oculomotor,  trochlear and abducent , accessory nerve and hypoglossal nerve (3, 4, 6,   11, 12)

Oculomotor, trochlear and abducent nerves are pure motor nerve which innervate extraocular muscles

	Nerves	Functions	Nucleus	Parasympathetic ganglion	Name of the opening through which nerve exit the cranium
III	Oculomotor nerve	All extra-ocular muscles of  eye are supplied by oculomotor nerve except SO and LR	Oculomotor nucleus Edinger –Westphal  nucleus	This nerve is related with ciliary ganglion	Superior orbital fissure

 

	Nerves	Functions	Nucleus	Name of the opening through which nerve exit the cranium
IV	Trochlear nerve	SO 4: superior oblique muscle is supplied by trochlear nerve	Trochlear nucleus	Superior orbital fissure
VI	Abducent nerve	LR 6: lateral rectus muscle is supplied by abducent nerve	Abducent nucleus	Superior orbital fissure

 

XI	Accessory nerve	Functions	Nucleus	Name of the opening  through which nerve exit  the cranium
	Cranial root	It supplies all muscles of soft palate ( except tensor veli  palatine) and all muscles of  the pharynx except stylopharyngeus	Spinal accessory nucleus	Jugular foramen
	Spinal root	This part supplies the sternocleidomastiod and trapezius muscles		Foramen magnum
XII	Hypoglossal nerve	It supplies all muscles of the tongue except  palatoglossus	Hypoglossal nucleus	Hypoglossal canal