Cranial nerve quiz
Terms
undefined, object
copy deck
-
CNI
1. Name
2. function
3. component -
Olfactory
Sense of smell
SVA - Why is olfactory nerve called visceral afferent
- Because it assists body in preparing for eating by causing reflex salivation and increase in gastric motility
-
CN II
1. Name
2. components
3. function -
Optic
SSA
afferent fibers of retina, primary receptor for sense of sight -
CN III
1. Name
2. components -
Oculomotor
1. GSE - motor component innervates extra ocular muscles of eye which assist in rotational movement of the globe
2. GVE - P - parasympathetic innervation of intra ocular muscles of eye responsible for changing shape of lens for accomodation and for narrowing pupil, via inferior division of CN III and CILIARY GANGLION -
CN IV
Name
function
components -
Trochlear
innervation of one extraocular muscle - SUPERIOR OBLIQUE
GSE -
CN V
Components
Functions -
GSA, SVE
GSA - major sensory nerve of head, innervates portion of scalp, most of face, cornea, epithelium of nasal cavity, paranasal sinuses,oral cavity, skin of outer ear, external auditory meatus, external surface of tympanic membrane, cranial dura mater, also proprioceptive fibers to ALL skeletal muscle of head
SVE - motor innervation to skeletal muscle that come from arches - muscles of mastication, mylohyoid, anterior belly of digastric, tensor veli palatini, tensor tympani - Is trigeminal nerve parasympathetic
- Doesnt contain GVE - p because it distributes to majority of structures of head and face, but carries CVE - P fibers of CN VII and IX to glands of head - mucous and salivary
-
CN VI
Name
function -
Abducens
Innervation of one extraocular muscle - LATERAL RECTUS - abducts eye -
CN VII
components -
Facial
SVE - motor innervation to skeletal muscles coming from arches - muscles of facial expression, stylohyoid, posterior belly digastric , stapedius
GSA - sensory to portion of skin of external ear and external auditory meatus
SVA - taste to anterior 2/3 of tongue via CHORDA TYMPANI
GVA - sensory to uppermost portion of pharynx
GVE- p - parasympathetic to lacrimal gland, nasal, palatal, oral, pharyngeal mucous glands via GREATER PETROSAL NERVE and PTERYGOPALLATINE GANGLION, to submandibular and sublingual salivary glands via CHORDI TYMPANI and SUBMANDIBULAR GANGLION -
CN VIII
Name
components -
SSA - afferent fibers from organ of Corti related to hearing
from semicircular canals,utricle and macula from internal ear - equilibrium