PSYA01 Chapter 4 - Chapter 4 Biology of Behaviour The Brain...

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Chapter 4 Biology of Behaviour The Brain and Its Components Contains 10 – 100 billion nerve cells and about as many helper cells (support and housekeeping) PIERRE FLOURENS – different areas of brain responsible for different BUT many functions (e.g. memory) is distributed over large areas of brain. DONALD HEBB – studied how individual cells organized into large units and how they could generate thought, memory, and decision making. Nerve cells organized in modules – clusters of nerve cells that communicate with each other and each module has its own functions Structure of the Nervous System Brain – controls: behaviour. processes and retains info we receive from the env. And regulates the body’s physiological processes. It must be connected to other body parts and exchange info Central nervous system: brain and spinal cord (long, thin collection of nerve cells attached to the base of the brain and run the length of spinal cord column) Spinal cord – simple reflexes, e.g. automatically pulling your hand away when burning. Communication happens through nerves ( bundles of fibres that exchange info b/w the nervous system and the body. Peripheral nervous system – nerves attached to spinal cord and base of ban Brain has 3 major parts: brain stem, cerebellum, cerebral hemispheres (Fig.4.3) BRAIN STEM: control of physiological functions and automatic behavious CEREBRAL HEMISTPHERES: largest part of the human brain, evolved most recently.
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  • Fall '09
  • joorden

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