cranial nerve basics Flashcards
CN 1 olfactory
smell
-cribriform plate in ethmoid bone
-olfactory epithelium picks up smell receptors and synapses
CN 2 optic
vision
-optic foramen
-from periphery to optic chiasm, then to CNS
-contralateral function
CN 3 oculomotor
coordination of eye movement (SR, IO, IR, MR)
-superior orbital fissure
-going to muscle of eye
CN 4 trochlear
intorsion of eye (SO)
-superior orbital fissure
CN 5 trigeminal
sensory information of face (touch, pressure, pain, and temperature)
-superior orbital fissure, foramen rotundum, foramen ovale
-motor and sensory !!
what nerve is associated with the red reflex of the tympanic membrane?
CN 5 trigeminal
CN 6 abducens
abduction of the eye (LR)
-superior orbital fissure
CN 7 facial
facial movements, expressions, taste on anterior 2/3, touch and pressure and pain on tongue
-internal auditory canal
-branchiomeric motor : mimetic muscles of facial expressions
-parasympathetic : salivary, lacrimal and nasal glands
3 branches of CN 7
chorda tympani, greater petrosal nerve, and facial nerve
-chorda tympani is the taste part that runs through the middle ear
non acoustic middle ear reflex
elicited by tactile or electrocutaneous stimulation of most of the areas of skin on the side of the face and around the pinna
-present or absent
CN 8 vestibulocochlear
special sensory
-AVS structures
CN 9 glossopharyngeal
motor, sensory, parasympathetic
-branchiomeric
CN 10 vagus
sensory, parasympathetic motor functions and sensory
-innervates heart, branchial smooth muscles, larynx and pharynx and aids in digestive secretions
-branchiomeric
CN 11 spinal accessory
motor/efferent
-nucleus in the dorsolateral portion of the spinal cord
CN 12 hypoglossal
somatic motor, nucleus in medulla, received information from contralateral corticobulbar tract
-innervates ipsilateral tongue
