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anatomy exam 1
anatomy nervous system
| Question | Answer |
|---|---|
| 2 major components of nervous system | Central NS (CNS): nerves in brain + spinal cord Peripheral NS (PNS): nerves that branch out from cranial area and spinal cord |
| 3 nerve categories | 1. autonomic (involuntary action) 2. motor (stimulates muscles) 3. sensory (picks up sensations) |
| what categories do the cranial and spinal nerves consist of | motor (EFFERENT) and sensory (AFFERENT) |
| efferent nerves are _____ ? | motor |
| afferent nerves are _____ ? | sensory |
| peripheral nervous system consists of what | 1. nerves 2. ganglia (motor or sensory) |
| cranial nerves | referred to by roman numerals and name -12 pairs numbered according to cranial location (how they emerge from top to bottom) -can originate at either CNS or PNS |
| first 3 cranial nerves (O,O,O) | 1. Olfactory 2. Optic 3. Oculomotor |
| olfactory nerve | 1- sense of smell |
| optic nerve | 2- sense of sight/vision |
| oculomotor nerve | 3. eye movement (upward movement of eyelid and eyeball, constriction of pupul) |
| cranial nerves 4 and 5 (T, T) | 4. trochlear 5.trigeminal |
| trochlear nerve | 4- move eyes down (inferiorly) |
| trigeminal nerve | 5- sense of touch to face and muscles of chewing |
| cranial nerve 6 (A) | 6. abducens |
| abducens nerve | 6- outward movement of the eye -abducting of the eyeball |
| cranial nerves 7 and 8 (F, V) | 7. facial 8. vestibulocochlear |
| facial nerve | 7- muscles of the face, sensation of ear canal -taste for ANTERIOR 2/3 of tongue |
| vestibulocochlear nerve | 8- hearing and balance |
| cranial nerves 9 and 10 (G, V) | 9. glossopharyngeal 10. vagus |
| glossopharyngeal nerve | 9- taste in POSTERIOR 1/3 of tongue -secretion of saliva and pharyngeal constriction |
| vagus nerve | 10- sensation and movement of heart, lungs, larynx, pharynx, and GI tract |
| cranial nerves 11 and 12 (A, H) | 11. accessory 12. hypoglossal |
| accessory nerve | 11- contraction of neck and shoulder muscles |
| hypoglossal nerve | 12- movement of tongue |
Created by:
liz gelles