Flashcards
Cranial Nerves
Cards in this deck (28)
- 1Preganglionic Parasympathetic FibersCNIII, CNVII, CNIX, CNX
CAT nerves- feed 3X a day, 7 days a week, 9 lives, on the 10th they're dead - 2CNIII- Preganglionic PS FunctionCNIII--> to ciliary ganglion
-pupillary constriction
-lens bulging (intraocular mm) - 3CNVII- preganglionic PS Function--> to pterygopalatine ganglion AND submandibular ganglion
- tear production (lacrimal gland)+ mucous production with nose/palate
-salivation- sublingual and submandibular glands - 4CNIX- preganglionic PS Functionto otic gland
-for salivation(parotid gland) - 5CNX- preganglionic PS Functionto ganglion in neck, thorax, and abdomen(foregut & midgut)
-MAIN parasympathetic nerve of the body - 6CNIOlfactory
-smell- primary determinant of flavor
-extended part of CNS
-lesions cause anosmia - 7CNIIOptic
- vision- special sensory
-extended part of CNS - 8CNIIIOculomotor:
-4/6 extraocular eye muscles
1. superior rectus
2. medial rectus
3. inferior rectus
4. inferior oblique
-1/2 upper eyelid muscles
levator palpebrae superioris - 9CNIII Lesion-fixed dilated pupil
-droopy eyelids (ptosis)
-eye deviates down and out--> diploplia - 10CNIVTrochlear:
-1/6 extraocular muscles
-superior oblique muscle - 11CNIV Lesion-causes diploplia- double vision
- eye elevated on forward gaze
-tilt hear AWAY from lesion- eliminate diploplia - 12CNIVAbducent
1/6 extraocular muscles
- lateral rectus muscle - 13CNVI Lesion-lateral diploplia
- affected eye deviated medially- at rest
- turn head to the affected side- eliminates diploplia - 14CNV-SensoryTrigeminal
V1- forehead, eyelids, cornea, median nose, nasal cavity
V2- lateral forehead, lower eyelid, lateral nose, cheeks, nasal cavity, upper lip/teeth
V3- lower lip/teeth, tongue, chin, anterior ear - 15CNV-MotorV3-mandibular
-supplies 4mm of mastication
-2 suprahyoid mm
2 "tensor" mm - 16CNV-Lesion-causes dysthesia and jaw weakness
-depends on which branches are affected
-V3: jaw may deviate to side of lesion - 17CNVIIFacial
Sensory:
-Taste(special)- anterior 2/3 of tongue
-outer surface of tympanic membrane
-skin of external ear
Motor:
muscles of facial expression
1. temporal
2. zygomatic
3. buccal
4. marginal mandibular
5. cervical - 18CNVII LesionParalysis of facial muscles
-dry eyes and dry mouth - 19CNVIIIVestibulocochlear
- hearing (special sensory):cochlea
- balance/ proprioception (special): to semicircular canals - 20CNIX-SensoryGlossopharyngeal
-taste: posterior 1/3 of tongue
-general: post tongue, oropharynx, middle ear
-visceral: carotid body and sinus - 21CNIX- MotorGlossopharyngeal
-stylopharyngeus muscle - 22CNX-SensoryVagus
-Taste-epiglottis and pharynx
-external auditory canal, vallecula/ post tongue
Visceral- organs - 23CNX- MotorVagus
-supplies most muscles in the pharynx and soft palate
-all intrinsic muscles in the larynx - 24CNX LesionDysphagia- difficulty swallowing
Dysarthria- difficulty speaking
-alters uvula movement
-saying "ahh"-> moves away from lesion - 25CNXISpinal Accessory
-supplies to sternocleidomastoid and trapezius - 26CNXI Lesioncauses difficulty turning head or shrugging shoulders
- 27CNXIIHypoglossal
-supplies intrinsic and extrinsic tongue muscles
EXCEPT: Palatoglossus muscle - 28CNXII Lesioncauses tongue weakness and difficulty swallowing
-sticks out tongue toward lesion
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- CNS/Cranial Nerves Flashcards on Cranial Nerves, created by salu624 on 09/10/2013.
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