Gero 310 F'09 neuro 1

Gero 310 F'09 neuro 1 - Nervous system: normal physiology...

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Unformatted text preview: Nervous system: normal physiology Nervous system: normal physiology • defined in terms of discrete divisions, regions, structures- however, operates as a whole throughout entire body • closely interacts with all other systems in the body- receives info & directs actions-explain central nervous system or the systems and how it works Chp 6 Overview of nervous system 1) central nervous system (CNS) Two primary divisions 1) central nervous system 2) peripheral nervous system • composition : brain & spinal cord • function : central receiving - processing - transmitting- all tissues send information to the brain- info received by brain is processed, leading to a decision/response - directions for carrying out response are transmitted to appropriate tissue(s) • design :-protected by bone encasement * spinal cord = vertebrae * brain = skull- further isolated & protected by meninges * 3-layer covering between bone & tissue * part of the blood-brain-barrier that restricts entry into the CNS * meninges are bathed in cerebrospinal fluid (CSF) which also flows inside brain ventricles- CSF provides cushion support, waste removal Organization of the brain Organization of the brain • in early development, CNS is a tube- lengthens, develops at distal end (brain)-like a rosebud, stuff moving into the stem There is a whole in the center of the middle tube, CFS moves in the middle of it-CFS on outside, but also in the inside of the canal of the spinal cord and inside the brain faculty.washington.edu/ chudler/dev.html faculty.washington.edu/ chudler/dev.html • gross anatomy of brain major division subdivision key structures forebrain forebrain telencephalon telencephalon cerebrum, limbic cerebrum, limbic faculty.washington.edu/ chudler/dev.html faculty.washington.edu/ chudler/dev.html diencephalon diencephalon thalamus, hypothalamus thalamus, hypothalamus Hypothalamus - **Endocrine system midbrain mesencephalon colliculi, peduncles • gross anatomy of brain major division subdivision key structures faculty.washington.edu/ chudler/dev.html faculty.washington.edu/ chudler/dev.html hindbrain rhombencephalon pons, medulla (met-/myel-) cerebellum • gross anatomy of brain major division subdivision key structures faculty.washington.edu/ chudler/dev.html faculty.washington.edu/ chudler/dev.html • brain regions are inter-connected by highly complex and as yet incompletely defined circuitry • complex circuitry suggests specific neural functions likely involve interactions between multiple brain regions • nonetheless, strong evidence that many functions can be strongly associated with specific brain regions-Cortex involves six layers-Gyri are the mountains and sulci is the spaces between them-The six layer is important to advanced processing – the more neocortex you have the more processing you can do-The layers are long are folded back into itself to cram more of it in there-size of the sulci get larger with aging brain region anatomy neocortex- separated into lobes: prefrontal,...
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This note was uploaded on 01/16/2011 for the course GERO 310 taught by Professor Davies during the Fall '09 term at USC.

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Gero 310 F'09 neuro 1 - Nervous system: normal physiology...

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