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38 Cards in this Set
- Front
- Back
- 3rd side (hint)
Where do the cranial nerves originate? |
The inferior surface of the brain |
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Cranial nerves are part of the Peripheral Nervous System. True or False. |
True. The 12 cranial nerves and the 31 pairs of spinal nerves make up the PNS. |
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Sensory nerve conveys impulses related to smell with a degeneration rate of 1% per year. |
CN 1 - Olfactory nerve |
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Bilateral anosmia |
Disease of olfactory mucosa or the common cold therefore causing an Inability to smell |
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disease affecting the olfactory nerve, fractured of the crib inform plate, cerebral rumors of the frontal love which cause an inability to smell. |
Unilateral anosmia |
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Sensory nerve conveys impulses related to vision. Injury to any part of optic pathway results in visual loss |
CN II Optic nerve |
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Most common lesion affecting the optic chiasm |
Pituitary tumor Grows superiorly and Compresses nerve fibers in the chiasm |
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Motor nerve that originates from the midbrain. |
CN III Oculomotor nerve |
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Superior rectus, medial rectus, inferior rectus, and inferior oblique muscles of the eye are all inervated by which cranial nerve? |
CN III Oculomotor nerve |
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Compression of nerve may cause pupil(s) to remain dialated. Upper eyelid droops. |
3rd Nerve Palsy |
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Motor nerve, smallest of 12 cranial nerves. In torsion, depression and abduction of the eyeball. Supplies the superior oblique muscle. |
CN IV Trochlear nerve |
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Motor and sensory nerve. Largest of Cranial nerves. |
CN V Trigeminal nerve |
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Name the first branch of CN V Trigeminal nerve |
Ophthalmic branch CN V1 - supra orbital fissure wholly sensory |
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Name the 2nd branch of CN V Trigeminal nerve |
Maxillary branch CN V2 - for amen rotundum wholly sensory |
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Name the 3rd branch of CN V Trigeminal nerve |
Mandibular branch CN V3 - foramen ovale, motor and sensory |
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Wounds to the upper lip/ upper incisors may cause this. Anesthetic passing through orbit may cause temporary paralysis of extrinsic eyeball.
CN V2 and CN V3 commonly assoc. with dental caity pain |
Infra orbital block |
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Dentists anesthetize this nerve before repairing or removing mandibular teeth. Lingual is used as a landmark. Which nerve is this? |
Inferior alveolar nerve |
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Periodically severe stabbing pain. May last as long as 20 second intervals. Trigger points at lips, tongue, gums. |
Trigeminal neuralgia CN V2/3 |
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Supplies lateral rectus muscle which abducts the eye (moves away from midline) |
CN VI Abducens nerve |
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An inability to direct the eye laterally |
Stabismus, convergent squint or "cross eyes" |
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Which nerve emerges from brainstorm and enters the external acoustic meatus of the petro is portion if the temporal bone. |
CN VII Facial nerve |
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Which nerve exits the facial canal via stylomastoid foramen then enters the parotid gland; dividing into 5 branches? |
CN VII Facial nerve |
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What are the 5 branches of CN VII? |
Temporal, zygomatic, buccal, mandibular and cervical |
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Taste portion of 2/3 of anterior tongue. Inervates the submandibular, sublingual and lacrimal glands |
Sensory root (nervus intermedius) |
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Lesions of this nerve result in - facial paralysis - decreased salivation and lacrimation - loss of taste sensation - hearing sensitivity (stapedius no longer dampens sound therefore acute hearing) |
CN VII Facial nerve causing facial paralysis |
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What is the name of the 8th cranial nerve (CN VIII)? |
Vestibulocochlear nerve |
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What are the 2 branches of the CN VIII? |
Cochlear - auditory Vestibular - equilibrium |
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What is tinnitus? |
Damage to the cochlear branch resulting in deafness. |
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The condition to the vestibular nerve causing a sensation of spinning or whirling making a person dizzy is called what? |
Vertigo |
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What is an acoustic neuroma? |
Intracranial tumors which develop on the vestibulocochlear nerve. |
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This nerve is a mixed nerve. The motor portion supplies the stylopharyngeus muscle and parasympathetic fibers supply the parotid gland (mediates secretion of saliva) |
CN IX Glossopharyngeal nerve |
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The sensory portion of this nerve supplies the pharynx and taste buds of the posterior 1/3 of the tongue |
CN IX Glossopharyngeal nerve |
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Damage to this nerve results in difficulty swallowing, decreased saliva and loss of taste. |
CN IX Glossopharyngeal nerve |
The gag reflex checks the function of this nerve. |
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This nerve is widely distributed from the head and neck into the thorax and abdomen. |
CN X Vagus nerve |
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Name the places that the vagus nerve terminates in the body. |
An almost wandering nerve, CN X terminates in the muscles of the: -heart - respiratory passage - esophagus - stomach - small/large intestine - gallbladder - liver |
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Motor portion conveys motor impulses to the sternocleidomastoid and trapezius muscle. Which nerve is it? |
The CN XI Accessory nerve |
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What is the name of the nerve in which the Motor portion supplies the muscles of the tongue |
CN XII Hypoglossal nerve |
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How many cranial nerves are there? |
12 |
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