NEUROANATOMY 1

NEUROANATOMY 1 - ----------------WEEK 1: AN INTRODUCTION TO

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Unformatted text preview: ----------------WEEK 1: AN INTRODUCTION TO NEUROANATOMY:-------------1. CNS/ PNS a.Central nervous system (CNS):the part of the vertebrate nervous system that is located within the skull and spine.b.Peripheral nervous system (PNS):the part of the vertebrate nervous system that is located outside the skull and spine.i.Sensory: conducts signals to the CNS from sensory receptorsii.Motor: conducts signals away from the CNS to muscles, glands, and other organs----------------------------------------------------------------------------------------------2.Gyri/ Sulci/ Fissures/ Cortex a.Gyri (sing. Gyrus): the large ridges, or convolutions, between adjacent fissures.b.Sulci (sing. Sulcus): the small grooves in the cerebral hemispheres.c.Fissures: the large, deep grooves in the cerebral hemispheres.d.Central fissure: The long, deep fissure on the lateral surface of the cerebral hemispheres which runs from the longitudinal fissure down to the lateral fissure. e.Lateral fissure: the long, deep fissure that runs roughly horizontally on the lateral surface of the cerebral hemisphere on each side.f.Longitudinal fissure: the long, deep fissure which divides the two hemispheres. g.Cerebral cortex (cortex means bark): the outer layer of the cerebral hemispheres largely composed of gray matter. Any structure that is not cortical is generally referred to as subcortical.h.Gray matter:composed of cell bodies, dendrites, and short unmyelinated axonsi.White matter:composed of large myelinated axons that connect various areas of the cerebral cortex with other parts of the brain. 3.Brainstem: the central neural stem on which the two cerebral hemispheres sit; many brain stem structures play key roles in the regulation of the bodys inner environment. ----------------------------------------------------------------------------4.Cranial Nerves: nerves that extend directly from the brain and can innervate the face. Some are purely sensory and motor fibers. There are 12 cranial nerves numbered anterior to posterior from 1 to 12. a.Olfactory nerves:1stpair of cranial nerves which carry sensory signals from the olfactory receptors of the nose to the brain.b.Optic nerves:the 2ndpair of cranial nerves; they carry sensory signals from the visual receptors of the eyes to the brain....
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This note was uploaded on 04/23/2008 for the course COGS 107C taught by Professor Chiba during the Spring '07 term at UCSD.

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NEUROANATOMY 1 - ----------------WEEK 1: AN INTRODUCTION TO

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