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Unformatted text preview: 20071002 Descartes and the “Ghost in the Machine” • 16th century: Kepler, Galileo, Newton • Descartes: Reflex arc and the soul The Organisation and Function of the Nervous System Evolution of the Nervous System • Vary in Size and centralization across species o Simpler organisms: regional control o Complex organisms: central control • Ganglia in simple organisms evolved towards centralization in the head o Direction, receptors Divisions of the Nervous System • Central Nervous System (CNS) o Brain and the spinal cord o Where integration of information occurs o Spinal Cord: Most nerves enter and leave by it Cranial nerves are the one exception to the rule that all nerves connect to the spinal cord Spinal reflexes do not involve the brain • Peripheral Nervous System o Connects CNS with muscles, glands and sensory receptors o Efferent (from CNS) Carry info exiting the CNS o Afferent (to CNS) Arriving at nervous system that affects o Autonomic Brain Structure and Function • 3 pounds • 2% of weight but consumes 20% of the used oxygen • Metabolic Rate o Relatively constant day/night o Increases slightly when dreaming • ...
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This note was uploaded on 04/04/2009 for the course PSYCH 1000 taught by Professor Atkinson during the Spring '09 term at UWO.
- Spring '09