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Unformatted text preview: Autonomic Nervous System Sympathetic nervous system, parasympathetic nervous system. Sympathetic nervous system: two chains of neuron clusters to the left and right of the spinal cord: arouses the body for vigorous action. Parasympathetic nervous system: axons extend from the medulla, and the lower part of the spinal cord near organs. Decreases heart rate and promotes digestion, other non-emergency functions. Sympathetic and parasympathetic divisions typically function in opposition to each other. But this opposition is better termed complementary in nature rather than antagonistic. For an analogy, one may think of the sympathetic division as the accelerator and the parasympathetic division as the brake. The sympathetic division typically functions in actions requiring quick responses. The parasympathetic division functions with actions that do not require immediate reaction. Consider sympathetic as " fight or flight " and parasympathetic as "rest and digest". Theories of Emotion The James-Lange Theory of Emotions: Your interpretation of a stimulus evokes autonomic changes and sometimes muscle actions. i.e. your perception of your action is the emotion. SITUATION-Your interpretation of a stimulus evokes autonomic changes and sometimes muscle actions....
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- Spring '08