CNS + PNS + Cranial Nerves

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Presentation transcript:

CNS + PNS + Cranial Nerves

A. Central Nervous Sys (CNS) Brain – central control Spinal cord – connects brain to body

Cross section – spinal cord

B. Peripheral Nervous Sys (PNS) Outside the CNS 31 pair of spinal nerves 12 Cranial Nerves

B. PNS

CNS vs PNS

Cranial Nerves

C. Cranial Nerves CN #1. Olfactory smell 2. Optic vision 3. Occulomotor eye movement constriction of pupil 4. Trochlear 6. Abducens 5. Trigeminal chewing sensation in face

C. Cranial Nerves CN #7. Facial facial expression taste 8. Acoustic – also called vestibulocochlear hearing 9. Glossopharyngeal taste / gag reflex 10. Vagus swallowing / gag reflex / speaking 11. Accessory shrugging 12. Hypoglossal tongue movement

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