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| Question | Answer |
| Preganglionic Parasympathetic Fibers | CNIII, CNVII, CNIX, CNX CAT nerves- feed 3X a day, 7 days a week, 9 lives, on the 10th they're dead |
| CNIII- Preganglionic PS Function | CNIII--> to ciliary ganglion -pupillary constriction -lens bulging (intraocular mm) |
| CNVII- preganglionic PS Function | --> to pterygopalatine ganglion AND submandibular ganglion - tear production (lacrimal gland)+ mucous production with nose/palate -salivation- sublingual and submandibular glands |
| CNIX- preganglionic PS Function | to otic gland -for salivation(parotid gland) |
| CNX- preganglionic PS Function | to ganglion in neck, thorax, and abdomen(foregut & midgut) -MAIN parasympathetic nerve of the body |
| CNI | Olfactory -smell- primary determinant of flavor -extended part of CNS -lesions cause anosmia |
| CNII | Optic - vision- special sensory -extended part of CNS |
| CNIII | Oculomotor: -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 |
| CNIII Lesion | -fixed dilated pupil -droopy eyelids (ptosis) -eye deviates down and out--> diploplia |
| CNIV | Trochlear: -1/6 extraocular muscles -superior oblique muscle |
| CNIV Lesion | -causes diploplia- double vision - eye elevated on forward gaze -tilt hear AWAY from lesion- eliminate diploplia |
| CNIV | Abducent 1/6 extraocular muscles - lateral rectus muscle |
| CNVI Lesion | -lateral diploplia - affected eye deviated medially- at rest - turn head to the affected side- eliminates diploplia |
| CNV-Sensory | Trigeminal 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 |
| CNV-Motor | V3-mandibular -supplies 4mm of mastication -2 suprahyoid mm 2 "tensor" mm |
| CNV-Lesion | -causes dysthesia and jaw weakness -depends on which branches are affected -V3: jaw may deviate to side of lesion |
| CNVII | Facial 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 |
| CNVII Lesion | Paralysis of facial muscles -dry eyes and dry mouth |
| CNVIII | Vestibulocochlear - hearing (special sensory):cochlea - balance/ proprioception (special): to semicircular canals |
| CNIX-Sensory | Glossopharyngeal -taste: posterior 1/3 of tongue -general: post tongue, oropharynx, middle ear -visceral: carotid body and sinus |
| CNIX- Motor | Glossopharyngeal -stylopharyngeus muscle |
| CNX-Sensory | Vagus -Taste-epiglottis and pharynx -external auditory canal, vallecula/ post tongue Visceral- organs |
| CNX- Motor | Vagus -supplies most muscles in the pharynx and soft palate -all intrinsic muscles in the larynx |
| CNX Lesion | Dysphagia- difficulty swallowing Dysarthria- difficulty speaking -alters uvula movement -saying "ahh"-> moves away from lesion |
| CNXI | Spinal Accessory -supplies to sternocleidomastoid and trapezius |
| CNXI Lesion | causes difficulty turning head or shrugging shoulders |
| CNXII | Hypoglossal -supplies intrinsic and extrinsic tongue muscles EXCEPT: Palatoglossus muscle |
| CNXII Lesion | causes tongue weakness and difficulty swallowing -sticks out tongue toward lesion |
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