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Cranial Nerves
Cranial Nerves and their fx
| Question | Answer |
|---|---|
| Cranial nerve I. | Olfactory / Sensory |
| Cranial nerve II. | Optic / Sensory |
| Cranial nerve III. | Oculomotor / Motor |
| Cranial nerve IV. | Trochlear / Motor |
| Cranial nerve V. | Trigeminal / Both Sensory and Motor |
| Cranial nerve VI. | Abducens / Motor |
| Cranial nerve VII. | Facial / Both Sensory and Motor |
| Cranial nerve VIII. | Vestibulocochlear (Auditory) / Sensory |
| Cranial nerve IX. | Glossopharyngeal / Both Sensory and Motor |
| Cranial nerve X. | Vagus / Both Sensory and Motor |
| Cranial nerve XI. | (Spinal) Accessory / Motor |
| Cranial nerve XII. | Hypoglossal / Motor |
| In addition to purely sensory and motor nerves, cranial nerves also contain | ...sensory proprioceptive fibers in their motor neural pathways |
| olfactory signals are ultimately processed by | ... the thalamus and frontal lobe. |
| The olfactory nerves are | sensory nerves associated with smell. |
| Optic nerves are | sensory nerves related to vision. |
| Ultimately, optic nerve signals are processed by | the visual cortex that is located in the occipital lobe and by specialized optic reflex centers located in the midbrain region. |
| Oculomotor nerves are | mixed sensory and motor nerves that innervate and help control some of the intrinsic and extrinsic eye muscles. |
| Parasympathetic fibers of the oculomotor nerves serve to | control the contractions of the iris that, in turn regulate dilation and constriction of the pupil. |
| Fibers of the oculomotor nerve also help to | control muscles that shape the lens of the eye |
| The trochlear cranial nerves are | mixed sensory and motor nerves that innervate the superior oblique muscles of the eye |
| The trigeminal nerves are | the major sensory nerves of the face |
| The trigeminals derive their name from | the fact that each has three major branches, the ophthalmic, maxillary, and mandibular nerves. |
| The ophthalmic and maxillary nerves are | sensory nerves. |
| The mandibular nerve is | a mixed nerve containing both sensory and motor tracts. |
| The trigeminal nerve is important to | the control of chewing (mastication). |
| The abducens cranial nerves | (provide a motor pathway that innervates the lateral rectus muscles and thereby) regulate abduction of the eye. |
| The facial nerves are | mixed sensory and motor cranial nerves that service the facial area. |
| Facial cranial nerves also carry | sensory taste related signals from the frontal (or anterior) regions of the tongue. |
| The acoustic nerves (or vestibulocochlear), via their vestibular and cochlear sensory branches, provide | a neural pathway to relay sound and pressure induced stimuli (sound waves are pressure waves) from the inner ear to the bain. |
| The acoustic nerves also provide | critical information needed to maintain balance |
| The glossopharyngeal cranial nerves | motor: responsible for swallowing, and sensory relay taste stimuli from back or posterior regions of the tongue. |
| Glossopharyngeal cranial nerves also provide neural pathways that play a role in | the regulation of respiration and blood pressure and respiration |
| The vagus cranial nerves provide | parasympathetic innervation to the heart, bronchi, stomach, intestines, and other thoracic and abdominal visceral parasympathetic effectors |
| Spinal accessory cranial nerves | join with spinal nerves to innervate motor pathways of the trapezius and sternocleidomastoid muscles |
| The hypoglossal cranial nerves provide | motor pathways to muscles related to swallowing. |
| Cranial nerves are | nerves that emerge from the brainstem instead of the spinal cord. |
| Cranial nerves - sensory/motor/both mnemonics | Some Say Marry Money, But My Brother Says Bad Business Marry Money |
| Cranial nerves - names mnemonics | Ooh, Ooh, Ooh To Touch And Feel Virgin Girls Vaginas, Ahh Heaven! |