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PSC100_Lecture2_January 11 2011

PSC100_Lecture2_January 11 2011 - PSC 100 Prof Gibbs...

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PSC 100 Prof. Gibbs January 11, 2011 Lecture 2: Brain Processes and Sensation Basic Functions: 1. Reception- We need to receive information 2. Reaction- We then respond to all kinds of input 3. Integration- We then take in all the information and we put it together Chain of events in all levels: 1. Afferent Fibers: Stimulus receptor Nervous System 2. Efferent Fibers: Command to act/Respond Efferent Fibers 3. Inter-neurons- cells with the information processing system that are passing the information on. 4. Reflexes-Require no inter-neurons, no brain activity needed. The wiring for reflexes is an automatic quick response, it is direct, and can’t be overridden (if it is it’s not a reflex). Stimulus receptor Protective Response Example: You touch a hot plate; immediately retract your hand. This do not require for the information of “it’s hot” to travel up the spinal cord and then be processes by the brain, it simply occurs.
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What is the information processing system made out of? 1. Neurons: the smallest unit of the information processing system a. Soma: Cell body, nucleus of cell, responsible for life, responsible for nutrition and metabolic state of the cell. b. Dendrites: look like tree branches and they receive information. As brain develops and learning occurs, the dendrites become extended and grow and become more complex, the more complex dendrites are the more information they
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PSC100_Lecture2_January 11 2011 - PSC 100 Prof Gibbs...

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