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25 Cards in this Set
- Front
- Back
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CN I
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Olfactory Nerve (nose)
-recpetors on nasal epithelium -neurons travel thru cribriform plate of the ethmoid bone |
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CN II
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Optic (eyes)
-receptors in the retina of the eyes -optic nerves thru optic canal in the sphenoid bone to diencephalon via optic chiasma |
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CN III
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Oculomotor Nerve
-orginiate in the midbrain -exiting the cranial vault via the superior orbital fissure (SEN) -divdes to supply 4 of 6 extrinsic eye muscles -parasympathetic innervation (VEN) |
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CN IV
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Trochlear Nerve (1 of 6 eye m)
(SEN) -originate in the midbrain -exiting cranial vault via the superior orbital fissure |
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CN V
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Trigeminal Nerve
-originat in the pons -3 divisions: opthalmic (V1), maxillary (V2), mandibular (V3) -exits the cranial vault via a separate cranial opening inthe sphenoid bone |
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CN V1
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Opthalmic Nerve
-exits thru the superior orbital fissure -SAN -upper 1/3 face |
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CN V2
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Maxillary Nerve
-exits thru the foramen rotundum -SAN -mid 1/3 face |
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CN V3
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Mandibular Nerve
-exits thru foramen ovale -SAN: lower 1/3--> ant. 2/3 tongue -SEN: 4 mastication mm. |
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CN VI
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Abducens Nerve (1 of 6 eye m)
(SEN) -originate in the pons -exit the cranial vault via the superior orbital fissure |
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CN VII
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FACIAL Nerve
-originate in the pons, enter the petrous portion of the temporal bone via the internal acoustic meatus -tast receptors -exits the cranium via the stylomastoid foramen |
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FACIAL
(SAN/SEN) |
SAN
-tast ant. 2/3 tongue SEN -facial expression mm -parasympathetic (VEN): lacriminal & salivary glands |
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CN VIII
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Vestibulocochlear
-orginate in brainstem -DO NOT exit the cranium -sesnory info. from inner ear to pons |
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CN IX
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Glossopharyngeal
-originates in medulla -exit jugular foramen -carries sensory fibers from the pharynx and posterior 1/3 of tongue (SAN) -swallowing (SEN) -parasympathetic to the parotid gland (VEN) |
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CN X
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Vagus
-originate in medulla -exit jugular foramen -outside of head and neck (VAN) -"wandering" nerve -provides somatic motor innervation to muscles of the palate and larynx, etc. |
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CN XI
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Spinal Accessory Nerve
-originate in medulla and upper spinal cord -exit the jugular foramen -innervates SCM and tapezuis muscles |
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CN XII
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Hypoglossal Nerve
-nerve goes below tongue -all muscles innervated w/ tongue -originate in the medulla oblongata -exit the hypoglossal canal in the occipital bone -provide somatic motor innervation to most tongue mm (SEN) |
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Brain-
DIENCEPHALON |
-located in the central core of the brain.
-connects the cerebrum to the brainstem =thalamus and hypothalamus |
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Brain-
Cerebellum |
-reponsible for coordination of muscle contractions to produce smooth movements
-control equilibrium |
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Brain-
Ataxia |
-loss of motor control
-damage or disease to cerebellum ex) drunk, Parkinson's |
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Brain-
Brainstem |
-most superior part
-Midbrain(CN4-5)-connects cerebrum to the rest of the brainstem -Pons (CN5-8)-bridge cerebellum & brainstem -Medulla oblongata (CN8-12)-controls vital autonomic functions |
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Spinal-
Conus Medullaris |
the tapered, temial portion of the spinal cord (L1/L2)
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Spinal-
Cauda Equina |
extends inferiorly from the conus medullaris and is comprosed of the VENTRAL and DORSAL ROOTS from inferior spinal cord segments.
-resembles horse's tail |
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REFERRED PAIN
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inflammation or obstruction of a visceral organ is generally poorly localized
-may be "felt" in a somatic structure rather than in the organ in which the irritation originates. -input is "misinterpreted" by the CNS |
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DORSAL RAMI
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posterior branch of spinal n.
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VENTRAL RAMI
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front, limbs
-become intercostal nerves and subcostal nerve when they enter intercostal spaces under rib -motor and sensory to structures of the anterolateral body wall |
