Cranial Nerves Flashcards
CN II
Optic nerve
Sensory
Ganglion cells in retina
Optic canal
CN VIII
Vestibulocochlear nerve Sensory: hearing and balance Internal acoustic meatus Vestibular ganglion Cochlear ganglion
CN IV
Trochlear nerve Somatic motor Trochlear nucleus Superior orbital fissure Superior oblique muscle Unable to look down
CN VI
Abducens nerve Somatic motor Abducens nucleus in pons Cavernous sinus/superior orbital fissure Lateral rectus muscle Unable to abduct eye
CN XI
Spinal accessory nerve Somatic motor From upper 5 segments of spinal cord Foramen magnum/ jugular foramen Trapezius and sternoclidomastoid Shoulder droop
CN XII
Hypoglossal nerve Somatic motor Hypoglossal nucleus of brain stem Hypoglossal canal Intrinsic and extrinsic muscles of tongue except palatoglossus Tongue deviates to affected side
CN III
Occulomotor nerve
Somatic motor and parasympathetic
Occulomotor nucleus and edinger westfall
Superior orbital fissure
Dilated pupils, droopy eyelid, pupil down and out
CN VII
Somatic motor, pregang parasympathetic, somatic sensory
Internal acoustic meatus
Facial motor nucleus, superior salivary nucleus, geniculate nucleus
CN V
Trigeminal nerve
Somatic motor and somatic sensory
Trigeminal motor nucleus, trigeminal ganglion
V1: superior orbital fissure (opthalmic)
V2: foramen rotundum (maxillary)
V3: foramen ovale (mandibular)
CN IX
Glossopharngeal nerve
Somatic motor: nucleus ambiguous
Pregang parasymp: inferior salivary nucleus
Somatic sensory: inferior ganglion of IX
Visceral sensory: inferior ganglion of IX
Jugular foramen
CN X
Vagus nerve Pregang parasymp: dorsal motor nucleus Somatic motor: nucleus ambiguous Somatic sensory: superior ganglion of X Visceral sensory: inferior ganglion of X Jugular foramen
CN I
Olfactory nerve
Sensory
Cribiform plate
Synapse at olfactory bulb
