7-9 cranial nn.
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| What nerve fibers of the PNS carry impulses towards the CNS? | Affferent (sensory)
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| What nerve fibers of the PNS carry impulses from the CNS to the muscles? | Efferent (motor)
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| What are the two divisions of the ANS? | Sympathetic and parasympathetic
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| Are cranial nerves part of the PNS or ANS? | PNS
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| What does the somatic nervous system deal with? | Body, skeletal muscles, sensations, etc
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| What does the autonomic nervous system deal with? | Organs (viscera), INVOLUNTARY
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| Cranial nerve components- motor | Fibers to: voluntary skeletal muscle, involuntary cardiac/smooth muscles or glands, voluntary skeletal muscles during development
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| Cranial nerve components- sensory | General sensation, sensations from the viscera, unique/special sensations
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| How are the cranial nerves named? | Anterior to posterior; 1-12
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| What does the pituitary gland sit on? | Hypophysial plate
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| What are the names of the cranial fossas? | Anterior, middle, posterior
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| What does the abducens nerve sit on? | Clivus
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| Olfactory nerve | CN I; sensory; cribiform plate of ethmoid; smell and taste
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| Optic nerve | CN II; sensory; optic canal of sphenoid; vision
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| Where is the optic chiasm located? | Superior to pituitary gland
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| Oculomotor nerve | CN III; motor; superior orbital fissure of sphenoid; motor to majority of eye muscles
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| Trochlear nerve | CN IV; motor; superior orbital fissure of sphenoid; motor to superior oblique muscle
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| What nerve comes off the opposite side of the brain stem? | Trochlear nerve
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| Trigeminal nerve | CN V; motor and sensory; superior orbital fissure, foramen rotundum, foramen ovale; motor to the muscles of mastication and sensation to face
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| What nerve do dentists usually block? | Trigeminal nerve
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| What are clinical correlates for trigeminal nerve? | Tic douloureux, loss of corneal reflex, dental anesthesia
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| Abducens nerve | CN VI; motor; superior orbital fissure of the sphenoid; motor to lateral rectus muscle, abduction of eye
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| 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
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| What nerve is responsible for taste for the anterior 2/3 of the tongue? | Chorda tympani nerve
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| Vestibulocochlear nerve | CN VIII; sensory; internal acoustic meatus; balance and hearing
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| Clinical correlates of vestibulocochlear nerve | Vertigo, deafness, conductive & sensorineural
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| 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
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| 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
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| Clinical correlates of vagus nerve | Dysphonia, dysphagia, aphonia, respiratory stridor
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| If a patient can't shrug their shoulders and swallow, what nerves are damaged? | CN IX-XI, jugular foramen
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| Spinal accessory nerve | CN XI; Motor (neck); jugular foramen and foramen magnum; motor to the SCM and trap
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| Hypoglossal nerve | CN XII; motor (tongue); hypoglossal canal; motor to the muscles of the tongue
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| Clinical correlates of hypoglossal nerve | Ipsilateral tongue paralysis and atrophy
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