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IS-B1-Cranial Nerves

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Question
Answer
Which bone does CN1 run through?   Ethmoid  
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Which passage does CN1 run through?   Cribriform plate  
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Where is CN II on the surface of the brain?   Lateral geniculate nucleus  
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What two structures are associated with CN II?   Optic Chiasm and Optic Tract  
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any muscles that have the name tensor in them will be innervated by what?   CN V3  
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any muscle with the word palate in it will be innervated by what CN?   CN X  
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any muscle with glossus will be innervated by what CN?   CN XII  
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What bone does CN II run through?   Sphenoid bone  
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What passage does CN II run through?   Optic canal  
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What is the target organ for CN I?   Epithelium of nasal walls  
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What is the target organ for CN II?   Retina  
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What is the course in the cranial cavity for CN III?   interpeduncular fossa - cavernous sinus  
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What bone does CN III go through?   Sphenoid bone  
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What passage does CN III go through?   Superior Orbital Fissure  
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What parasympathetic ganglion is associated with CN III?   Ciliary Ganglion  
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What are the principal branches of CN III?   Inferior and Superior divisions  
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What are the target organs of CN III?   Extraocular muscles (excluding superior oblique and lateral rectus), ciliary body and constrictor pupillae muscles (paras)  
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What are the functions associated with CN III?   Somatic motor and parasympathetic  
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Ptosis of superior palpebrum or pupillary light reflex impairment are physical examples of a lesion on which CN?   CN III  
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Where does CN IV exit the brain?   Posterior Midbrain  
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What course does the CN IV take in the cranial cavity?   Tentorium cerebelli, cavernous sinus  
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What bone does CN IV go through?   Sphenoid Bone  
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What passage does CN IV go through?   Superior orbital fissure  
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What is the target organ for CN IV?   superior oblique muscle only  
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What is the function associated with CN IV?   Somatic motor  
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Where does CN V exit the brain?   Middle cerebellar peduncle of the pons  
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In what cranial fossa does CN V exit the brain?   Middle Cranial Fossa  
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Where does CN V1 travel besides the middle cranial fossa?   cavernous sinus  
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Through what bone do all 3 branches of the CN V pass?   Sphenoid bone  
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What passage does CN V1 go through?   Superior orbital fissure  
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What passage does CN V2 go through?   Foramen rotundum  
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What passage does CN V3 go through?   Foramen ovale  
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True or False - the CN V has a sensory ganglion associated with it? If so, what is its name?   Trigeminal Sensory Ganglion. True.  
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What are the target organs of CN V1?   orbit, eye, superior palpebrum and forehead  
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What are the target organs of CN V2?   nasal cavity, upper teeth, gingiva and cheek  
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What are the target organs of CN V3?   oral cavity, lower teeth, face, muscles of mastication  
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What are the functions of the three principle branches of CN V?   V1 and V2 are sensory only. V3 is sensory and somatic motor  
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Where does CN VI leave the brain?   Pontomedullary junction  
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What bone and passage does CN VI go through?   Sphenoid bone, superior orbital fissure  
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What target organ does CN VI innervate?   Lateral rectus muscle  
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What is the function of CN VI?   Somatic Motor  
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Where does CN VII leave the brain?   Pontomedullary junction  
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What bone and passage does CN VII go through?   temporal bone and internal auditory meatus  
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In what fossa does the CN VII go through?   Posterior Cranial Fossa  
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What extracranial course does CN VII go through?   Parotid gland and subcutaneous tissue of the face, floor of sphenoid sinus. Pterygopalatine fossa, nasal cavity and orbit.  
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What ganglions of what type belong to CN VII?   Geniculate ganglion - general sensory Pterygopalatine ganglion - parasympathetic Submandibular ganglion - parasympathetic  
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What are the principle branches of CN VII?   Greater petrosal, Nerve to stapedius, temporal, zyogmatic, buccal, marginal mandibular and cervical nerves.  
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What are the target organs of CN VII?   muscles of facial expression, lacrimal gland, tongue  
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What are the functions of CN VII?   somatic motor, parasympathetic, special sensory taste and general sensory  
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Where does the CN VIII leave the brain?   Pontomedullary junction  
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What bone and passage does the CN VIII go through?   Temporal bone, internal auditory meatus  
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What are the principle branches of the CN VIII?   vestibular and cochlear  
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What are the target organs of CN VIII?   Vestibular apparatus of inner ear, cochlea  
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WWhere does the CN IX leave the brain?   Medulla  
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What bone and passage does the CN IX go through?   Temporal bone, jugular foramen  
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Does the CN IX have a sensory or autonomic ganglion associated and if so, name them and their type.   superior and inferior sensory ganglia (general and special sensory) and Otic Ganglion - parasympathetic  
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What are the target organs of CN IX?   stylopharyngeus muscle, parotid gland, tongue, middle ear, pharyngeal wall.  
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What are the functions associated with CN IX?   somatic motor, parasympathetic, taste and general sensory  
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Where does CN X come out of the brain?   medulla  
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What bone and passage does the CN X go through?   between petrous temporal bone and occipital bone. Jugular foramen  
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Does CN X have sensory or autonomic ganglion associated and if so, name them and their type.   superior and inferior sensory ganglia (general and special sensory) and distributed parasympathetic ganglia  
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What are the target organs of the CN X?   head and neck muscles, pharyngeal and laryngeal, and organs.  
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What are the functions of CN X?   somatic motor, parasympathetic, taste, non-conscious visceral sensations.  
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Where does CN XI come out of the brain?   Trick question - it's from the spinal cord.  
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What course does CN XI take on its way into the cranium?   vertebral canal, foramen magnum and posterior cranial fossa  
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What bone and passage does the CN XI go through?   between petrous portion of temporal bone and occipital bone. Jugular foramen  
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What are the functions associated with CN XI?   somatic motor - contralateral head rotation and ipsilateral shoulder elevation  
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Where does the CN XII leave the brain?   medulla  
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What bone and passage does the CN XII go through?   occipital bone, hypoglossal canal  
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What is the target organ of the CN XII?   The tongue, genioglossus, etc. all the "glossus" muscles.  
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What is the function of the CN XII?   somatic motor  
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What is injured when the tongue deviates toward the paralyzed side upon protrusion?   CN XII  
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