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Anatomy - Exam 3

Peripheral Nervous System

The Peripheral Nervous System is... Portion of the nervous system outside the central nervous system
The PNS conveys ... impulses to and from brain & spinal cord
2 types of nerves cranial & spinal
Sensory Nervous Towards CNS
Mixed Nerves composed of... sensory & motor neurons!
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!
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
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
Optic Nerve II - Sensory Nerve - PHOTORECEPTORS - Cross at optic chiasma
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
Created by: sgartrell