Peripheral Nervous System
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| The Peripheral Nervous System is... | Portion of the nervous system outside the central nervous system
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| The PNS conveys ... | impulses to and from brain & spinal cord
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| 2 types of nerves | cranial & spinal
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| Sensory Nervous | Towards CNS
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| Mixed Nerves composed of... | sensory & motor neurons!
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| Cranial Nerves - how many pairs arise from the forebrain? from midbrain & brainstem? Most are? and osme are ONLY? | forebrain - 2
midbrain & brainstem - 10
most are MIXED
some are ONLY sensory!
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| On Old Olympus Towering Tops A Fin And Greek Viewed Some Hops | Olfactory, Optic, Ocularmotor, Trochlear, Trigeminal, Abducens, Facial, (Acoustic) Vestibulocochlear, Glossopharyngeal, Vagus, (Spinal) Accessory, Hypoglossal
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| Olfactory Nerve I | - bipolar neurons
- CHEMORECEPTORS
- Axons pass through cribiform plate of ethmoid
- SYNAPSE at olfactory bulb
- ONLY SENSE THAT DOESN'T PASS THROUGH THALAMUS
- 2 olfactory bulbs, divided by cristi galli
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| Optic Nerve II | - Sensory Nerve
- PHOTORECEPTORS
- Cross at optic chiasma
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| Oculomotor III | - Produce extrinsic and intrinsic movements of eyeball
- Innervates all eye muscles except 2
(Superior rectus, medial rectus, inferior rectus, inferior oblique, levator palpebra (to raise eyelid)
- Ciliar muscles control movement of pupil
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| Trochlear |
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Created by:
sgartrell
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