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7-9 cranial nn.

What nerve fibers of the PNS carry impulses towards the CNS? Affferent (sensory)
What nerve fibers of the PNS carry impulses from the CNS to the muscles? Efferent (motor)
What are the two divisions of the ANS? Sympathetic and parasympathetic
Are cranial nerves part of the PNS or ANS? PNS
What does the somatic nervous system deal with? Body, skeletal muscles, sensations, etc
What does the autonomic nervous system deal with? Organs (viscera), INVOLUNTARY
Cranial nerve components- motor Fibers to: voluntary skeletal muscle, involuntary cardiac/smooth muscles or glands, voluntary skeletal muscles during development
Cranial nerve components- sensory General sensation, sensations from the viscera, unique/special sensations
How are the cranial nerves named? Anterior to posterior; 1-12
What does the pituitary gland sit on? Hypophysial plate
What are the names of the cranial fossas? Anterior, middle, posterior
What does the abducens nerve sit on? Clivus
Olfactory nerve CN I; sensory; cribiform plate of ethmoid; smell and taste
Optic nerve CN II; sensory; optic canal of sphenoid; vision
Where is the optic chiasm located? Superior to pituitary gland
Oculomotor nerve CN III; motor; superior orbital fissure of sphenoid; motor to majority of eye muscles
Trochlear nerve CN IV; motor; superior orbital fissure of sphenoid; motor to superior oblique muscle
What nerve comes off the opposite side of the brain stem? Trochlear nerve
Trigeminal nerve CN V; motor and sensory; superior orbital fissure, foramen rotundum, foramen ovale; motor to the muscles of mastication and sensation to face
What nerve do dentists usually block? Trigeminal nerve
What are clinical correlates for trigeminal nerve? Tic douloureux, loss of corneal reflex, dental anesthesia
Abducens nerve CN VI; motor; superior orbital fissure of the sphenoid; motor to lateral rectus muscle, abduction of eye
Facial nerve CN VII; motor and sensory; internal acoustic meatus and stylomastoid foramen; motor to the muscles of facial expression and branchial motor, parasympathetic innervation to a few salivary glands; sensation, taste from the anterior 2/3 of tongue
What nerve is responsible for taste for the anterior 2/3 of the tongue? Chorda tympani nerve
Vestibulocochlear nerve CN VIII; sensory; internal acoustic meatus; balance and hearing
Clinical correlates of vestibulocochlear nerve Vertigo, deafness, conductive & sensorineural
Glossopharyngeal nerve CN IX; Motor and sensory (throat); jugular foramen; motor to stylopharyngeus muscle, innervation carotid sinus and body and parotid gland; sensation of the pharynx, sensation of taste from the posterior 1/3 of tongue; GAG reflex
Vagus nerve CN X; Motor and sensory (pharynx and rest of body); jugular foramen; sensation of the pharnyx, taste near epiglottis, vocal cords; parasympathetic innervation and sensation of/from organs, branchial motor to the palate/pharynx
Clinical correlates of vagus nerve Dysphonia, dysphagia, aphonia, respiratory stridor
If a patient can't shrug their shoulders and swallow, what nerves are damaged? CN IX-XI, jugular foramen
Spinal accessory nerve CN XI; Motor (neck); jugular foramen and foramen magnum; motor to the SCM and trap
Hypoglossal nerve CN XII; motor (tongue); hypoglossal canal; motor to the muscles of the tongue
Clinical correlates of hypoglossal nerve Ipsilateral tongue paralysis and atrophy
Created by: beranml



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