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PSYB65 Lec 1 Introduction, CNS Organization, Anatomy, Development and Evolution.doc

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University of Toronto Scarborough
Ted Petit

Introduction, CNS Organization, Anatomy, Development and Evolution Sunday, October 28, 2012 2:45 PM • The Basic Overview of the Human Brain • CNS & PNS make up the nervous system • CNS - brain and spinal cord PNS - everything else (nerves from spinal cord to fingers etc) • • Spinal cord is continuous with the brain • Whenever it enters the skull, we say everything downstream is the spinal cord • Schematics of brain structure Many ways of subdividing the brain • • Most simplistic way • Forebrain, Midbrain, Hindbrain • Hindbrain: Two major things • cerebellum - sensory motor integration - sensory info, integration and muscle control - taking information from the body and linking it together with motor information to control, appropriately, the body. • Medulla - responsible for basic life processes - keeping you alive at the most basic level -heart beat and respiration. Not a good place to have a stroke. • Midbrain - Reticular Formation - Very important for controlling sleep- wakefulness cycles (circadian rhythms) • Damaged reticular formation - coma • Anterior - towards the front (dog nose) • Posterior - towards the back (dog tail) • Thalamus - relay center into more modern parts of the brain in the human from the spinal cord • Hypothalamus - controls life processes in a more complex way - keeping the individual alive over a long period of time and the species alive over a long period of time. Responsible for eating behaviour, drinking, involved in territoriality and fighting, and sexual behaviour. • 4 F's - Finding, Feeding, Fighting, F***ing • System of Intercon
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