The Biology of Emotion & Stress

The Biology of Emotion & Stress - 11/19/2009 DEFINING...

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11/19/2009 1 T HE B IOLOGY OF E MOTION S TRESS Mary ET Boyle, Ph.D. Department of Cognitive Science UCSD D EFINING E MOTION Emotion —A feeling that differs from a person’s normal affective state; a biological function of the nervous system. change in physiological arousal A change in physiological arousal, ranging from slight to intense. An affective (feeling) response, which may be pleasant or npleasant unpleasant. The capacity to motivate a specific behavior (a behavioral response).
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11/19/2009 2 E XPERIENCING AN E MOTION : J AMES -L ANGE T HEORY The view that the physiological change s that ccur in esponse an event etermine e occur in response to an event determine the experience of an emotion . William James 1842-1911 James-Lange Theory Stimulus “It’s a bear!” Response Faster heartbeat, dilated pupils, etc. Emotion “I’m afraid!”
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11/19/2009 4 E XPERIENCING AN E MOTION : C ANNON -B ARD T HEORY The view that an event activates the thalamus, which stimulates the cerebral cortex to produce the feeling mponent (the experience) of the component (the experience) of the emotion and, at the same time, the rest of the body to produce the expression of the emotion. The emotional expression and experience take place simultaneousl y by way of thalamic stimulation. Visceral changes, somatic changes, and the emotional experience occur at the same time.
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11/19/2009 5 Cannon-Bard Theory Stimulus “It’s a bear!” Thalamus Emotion “I’m afraid” Response Faster heartbeat, dilated pupils, etc E XPERIENCING AN E MOTION : P APEZ C IRCUIT Emotional expression and experience re mediated b a s stem of are mediated by a system of interconnected forebrain structures known as the Papez circuit Emotional expression occurs through the hypothalamus. The cingulate gyrus—the neural area responsible for emotional experience.
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11/19/2009 6 The Papez Circuit Septal nuclei Cingulate Hippocampus Thalamus ammillary ody Mammillary body Entorhinal cortex The autonomic nervous system: an introduction to basic and clinical concepts Otto Appenzeller, Emilio Oribe E XPERIENCING AN E MOTION : M AC L EAN —T HE L IMBIC
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This note was uploaded on 09/07/2011 for the course COGS 17 taught by Professor Pineda during the Spring '06 term at UCSD.

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The Biology of Emotion & Stress - 11/19/2009 DEFINING...

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