Psych385 Reading Note Ch2&5

Psych385 Reading Note Ch2&5 - Chapter 5 Bodily...

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Chapter 5 Bodily Changes and Emotions Before William James – emotional experience generates the emotion-related bodily changes (emotion originates in mind) William James – alter this sequence, locating the origins of emotional experience in the body. Emotionally exciting fact provokes bodily responses, which in turn lead to the experience of emotion. Autonomic nervous system and neural signals from the workings of our muscles detect a distinct “bodily reverberation” (such as anger and sympathy) The autonomic nervous system Neural signals from the cortex communicate with the limbic system and the hypothalamus. These brain regions send signals from neurons of the autonomic nervous system to the target organs. These structures send signals back via the autonomic nervous system to the hypothalamus, limbic system, and cortex. Autonomic nervous system function – to maintain the internal condition of the body, to enable adaptive response to varying environmental events Parasympathetic branch – helps with restorative processes, reducing heart rate and blood pressure and increasing digestive processes Sympathetic branch – increases heart rate, blood pressure, and cardiac output and shuts down digestive processes, to help the individual to engage in physically demanding actions The autonomic nervous system also controls processes such as digestion, body fluids, blood flow, and temperature. The parasympathetic and sympathetic branches Parasympathetic autonomic nervous system incorporates nervous that originate in two different parts of the spinal cord: the vagus cord (top of spinal cord) and the sacral region (near the bottom) 1) The parasympathetic system decreases heart rate and blood pressure. It also facilitates blood flow by dilating certain arteries. The parasympathetic system also constricts the pupil and bronchioles. It stimulates the secretion of various fluids throughout the body, including those in the digestive glands, salivation, and tears. 2) The sympathetic system acts in the opposite way from the parasympathetic system. It increases heart rate, blood pressure, and cardiac output. It produces vasoconstriction in most veins and arteries. It shuts down the digestive processes and increases processes that provide energy for the body. Sympathetic system reduces the activity of natural killer cells, involved in immune responses.
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