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Bio 203 NS
Cranial nerves
| Question | Answer |
|---|---|
| CN I | Olfactory nerve |
| CN II | Optic Nerve |
| CN III | Occulomotor Nerve |
| CN IV | Trochlear Nerve |
| CN V | Trigeminal Nerve |
| CN VI | Abducens Nerve |
| CN VII | Facial Nerve |
| CN VIII | Vestibulocochular nerve |
| CN IX | Glossopharyngeal nerve |
| CN X | Vagus Nerve |
| CN XI | Accessory Nerve |
| CN XII | Hypoglassal Nerve |
| damage to this nerve impairs sense of smell | CN I |
| damage to this nerve causes blindness in visual field | CN II |
| Damage to this nerve causes drooping eyelid, dilated pupil, double vision, difficulty focusing, inability to move eye in certain directions | CN III |
| The only nerve that can regenerate | CN I |
| Damage to this nerve causes double vision and inability to rotate eye inferolaterally | CN IV |
| Damage to this nerve produces loss of sensation, impaired chewing | CN V |
| Damage to this nerve results in inability to rotate eye laterally . . .and at rest rotates medially | CN VI |
| Damage to this nerve produces sagging facial muscles and disturbed sense of taste (no sweet or salty) | CN VII |
| First sign of pituitary tumor | optic disturbances (close proximity to CN II) |
| Damage to this nerve effects anterior 2/3 of tongue (sugar, salt, vinegar, quinine) | CN VII |
| In addition to anterior 2/3, motor functions to eyes, smile, whistle, frown, raise eyebrows | CN VII |
| Mixed Motor: Innervated by Somatic (eye movement, eyelid)& Autonomic (circular muscle, ciliary muscle) | CN III |
| Eye movement, opening of eyelid, miosis, accomodation | CN III |
| Only somatic motor function to superior oblique muscle | CN IV |
| Three branches are: Opthalmic, maxillary, mandibular | CN V |
| This branch - sensations from nasal cavity, skin of forehead, upper eyelid, eyebrow, nose | CN V opthalmic branch |
| This branch- sensations from lower eyelid, upper lips, gums, teeth of maxilla, cheek, nose, palate, pharynx | CN V maxillary branch |
| This branch - sensations from teeth of mandible, lower gums, lips, palate, tongue. Motor function of temporalis and masseter muscles (muscles of mastication) | CN V mandibular branch |
| Provides eye movement bwo lateral rectus m. | CN VI |
| somatic motor - facial expressions | CN VII |
| Autonomic motor - salivary and lacrimal glands, mucous mem of nasal/palantine mucosa | CN VII |
| Special Sensory portion - anterior 2/3 tongue | CN VII |
| test tear glands by exposure to ammonia fumes | CN VII |
| This is one of the special sensory nerves | CN VIII |
| Has a cochlear branch (hearing) and vestibular branch (balance) | CN VIII |
| damage produces deafness, dizziness, nausea, loss of balance, nystagmus (the eye is looking for something stable and vertical to orient) | CN VIII |
| nystagmus results from damage to this nerve | CN VIII |
| Has somatic motor (swallowing, voice production) and autonomic motor (salivation, gagging) | CN IX |
| Sensations from posterior 1/3, including taste | CN IX |
| Sensations from baroreceptors (BP)and chemoreceptors (pO2, pH, pC02) bwo carotid sinus innervation | CN IX |
| If you want full taste, these must be healthy | CN VII and CN IX |
| 80% of all cranial nerve output comes from this nerve | CN X |
| This nerve has somatic, visceral, special sensor, somatic motor, autonomic motor innervation | CN X |
| Part of this nerve has sensations from skin at back of ear, external acoustic meatus, part of tympanic membrane, larynx, trachea, esophogus, thoracic, abd vicera | CN X |
| part of this nerve perceives sensations from baro & chemo receptors | CN X |
| Part of this nerve perceives special sensory - taste from epiglottis and pharynx | CN X |
| Part of this nerve's somatic motor functions is swallowing and voice production via pharyngeal muscles | CN X |
| Part of this nerve's autonomic motor innervates sm musc of abd visceral, normal or constricted airways, normal/decreased HR | CN X |
| Motor movement of swallowing, head, neck and shoulder via trapezius, sternocleidomastoid and pharyngeal muscles | CN XI |
| This nerve innervates tongue movement for speech, food manipulation and swallowing | CN XII |
| If both of these nerves are damaged (on either side of tongue), can't protrude tongue | CN XII |
| If one side of this nerve is damaged, tongue will deviate towards injured side | CN XII |
| Extreme pain in trigeminal nerve area near mouth or nose. Pain triggered by touch, drinking washing face. Tx may require cutting this nerve (and name disorder) | Trigeminal neuralgia (tic douloureux) |
| disorder of this nerve causes paralysis of facial muscles on one side, may appear abruptly with full recovery within 3-5 weeks | Facial nerve/Bell's Palsy |
Created by:
lorrelaws
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