BIOL 1020 Lecture Notes - Lecture 2: Medulla Oblongata, Cerebral Cortex, Long-Term Memory
24 Dec 2015
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Document Summary
Violence and out of contex: an injurious form of offensive aggression that is out of control, differes both quantitatively and qualitatively from normal, it has no additive functional value in social communication adaptive offensiveness. Aggression is based on brain mechanisms, learning, hormones. Functional group of integrating centres in cerebral cortex, thalamus and hypothalamus. Two main structures: the response is highly directed to prey/target, little sympathetic activation, this response requires planning and a strategy, positive reinforcement, very specific target. Defensive behaviour: increases in sympathetic activation, amygdala (autonomic responses with respect to fear, emotional, hippocampus a horseshoe shaped structure responsible for responses, and memory) long term memory. Memory = ability to store + retrieve information derived from experience; essential for learning. Neural basis of aggression: signal input can be from the cortex hunger , limbic system receives information from the brainstem. The limbic system receives sensory input which provides signals with emotional qualities.
