Cranial Nerves Flashcards
CN____: olfactory nerve
I
CN____: optic nerve
II
CN____: oculomotor
III
CN____: trochlear
IV
CN____: trigeminal
V
CN____: abducens
VI
CN____: facial nerve
VII
CN____: vestibulocochlear/acoustic
VIII
CN____: glossopharangeal
IX
CN____: vagus
X 10
CN____: accessory
XI 11
CN____: hypoglossal
XII 12
What is the name and number of the nerve with the following characteristics?
Arises from cerebrum.
Exits skull through olfactory foramina in cribriform plate of ethmoid.
Function: Sensory only. Sense of smell.
1 Olfactory nerve
Arises from diencephalon.
Exits skull through optic foramen of sphenoid.
Function: Sensory only. Vision.
2 optic nerve
Arises from brain stem.
Exits skull through superior orbital fissure of sphenoid.
Function: Mixed nerve. Motor to intrinsic and extrinsic eye muscles. Sensory for muscle sense (proprioception) of same area.
3 oculomotor
Arises from brain stem.
Exits skull through superior orbital fissure of sphenoid.
Function: Mixed nerve. Motor to extrinsic eye muscles. Sensory for muscle sense of same area.
4 trochlear
Arises from brain stem.
Ophthalmic branch exits skull through superior orbital fissure.
Maxillary branch exits skull through foramen rotundum of sphenoid.
Mandibular branch exits skull through foramen ovale of sphenoid.
Function: Mixed nerve. Motor to mastication muscles. Sensory to face, scalp, tear glands, mucous membranes of the nasal cavity and mouth.
5 trigeminal
Arises from brain stem.
Exits skull through superior orbital fissure.
Function: Mixed nerve. Motor to extrinsic eye muscles. Sensory for muscle sense of same area.
6 abducens
Arises from brain stem.
Exits skull through stylomastoid foramen of temporal bone.
Function: Mixed nerve. Motor to muscles of facial expression, salivation, and lacrimation. Sensory for taste and muscle sense.
7 Facial nerve
Arises from brain stem.
Exits skull through internal auditory meatus of temporal bone.
Function: Sensory only. Vestibular branch is sensory for equilibrium; cochlear branch is sensory for hearing.
8 acoustic
Arises from brain stem.
Exits skull through jugular foramen of temporal bone.
Function: Mixed nerve. Motor to swallowing and salivation. Sensory for taste from posterior part of tongue and muscle sense.
9 glossopharangeal
Arises from brain stem.
Exits skull through jugular foramen.
Function: Mixed nerve. Motor to pharynx, larynx, viscera of thorax and abdomen (Parasympathetic Nervous System). Sensory for muscle sense to same areas and taste.
10 vagus
Comprised of 2 nerves; cranial one arises from brain stem, spinal nerve arises from cervical spinal cord.
Exits skull through jugular foramen.
Function: Mixed nerve. Motor to muscles of pharynx and larynx, and to head movement muscles (Sternocleidomastoid, Trapezius). Sensory for muscle sense to the same area.
11 accessory nerve
Arises from brain stem.
Exits skull through hypoglossal canal of occipital bone.
Function: Mixed nerve. Motor to tongue. Sensory for muscle sense of tongue.
12 hypoglossal nerve
