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____ is a feeling state characterized by physiological arousal, expressive behaviors/responses, and a cognitive interpretation.
Emotion
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Behavioral signs of emotion are controlled by the ____, ____, and ____.
- somatic motor system (expressive behavior)
- ANS (and limbic system; physiological process)
- hypothalamus (cognitive appraisal)
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The James-Lange theory of emotion:
- Experience emotion in response to physiological changes in our body
- Physiology--> Appraisal
- Stimulus-->Response-->Emotion
- *Feedback from changes elicits emotions; Emotions are due to ANS
- (Happiness comes from smiling, sadness comes from crying)
"My heart is pounding so I must feel afraid"
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Cannon Bard Theory of emotion:
- An event evokes emotional experience and the physical arousal simultaneously, but independently
- Emotion originates in the thalamus
- Appraisal-->Physiology
- Stimulus-->Thalamus-->Emotion & Response
- Don't need to cry to feel sad, just need activation of thalamus
- "I feel afraid, so my heart pounds."
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Cognitive reactions can occur without ANS changes, but subjective experiences ___ without some ANS arousal.
Person can categorize without physiological change (no ANS), but emotions are absent or minimal.
Pure autonomic failure (PAF) occurs more often in ____. It is a loss of ___ output to the body, causing headaches, fainting, and decrease in sweat. These individuals have emotions, but are very weak and mild.
Locked-in syndrome occurs when there is damage to the ventral ____. Everything is paralyzed except for the ___. Patient is alert and conscious, but there is loss of output from brain to ____ or ___. Many patients report tranquility.
- brainstem
- eyes
- skeletal muscles, ANS
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Purposes of emotions (5)
- Induce motivation
- spring us into action
- more reactive
- facilitates learning/memory
- Facilitate performance
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The limbic system includes structures on the medial aspects of cerebral hemispheres and diencephalon. Two main structures for emotions are ___ and ___.
This structure is responsible for cognition and emotions through the use of gestures to resolve conflict.
This structure is responsible for fear and aggression.
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The limbic system is not the only area involved in emotions. Emotional reaction results from interaction between ___, ___, ___, and ___. Structures responsible for emotions may also have other functions.
- sensory stimuli
- brain circuitry
- past experiences
- NT systems
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Asymmetry in emotional processing
Left vs. Right.
left: Expression of positive emotion, damage=loss of joy(sadness, depression), activation=friendliness and outgoing
right: perception of emotion, facial, expression, & prosody, expression of negative emotion, damage=euphroic, mania, activation=withdrawal (less satisfied with life)
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The _____ is involved in behavioral and physiological responses associated with fear and anxiety.
Amygdala
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Damage to the amygdala lose much of their ____ or ___ and have trouble recognizing ______________.
Amygdala atrophies because of accumulation of calcium.
- fear, anxiety; approach people indiscriminately
- facial expressions of fear
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____ is a behavior that is motivated to cause harm to another living being.
two types:
Both types are controlled by the ____ and ___, but pathways eventually diverge.
Aggression
predatory, affective
Somatic motor system, ANS
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___ aggression is NOT associated with high-levels of activity in the sympathetic nervous system. This is an attack against someone else for purpose of food.
Predatory
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____ aggression IS associated with high-levels in the sympathetic nervous system. This is more for show, in that it uses a threatening posture to scare something away.
Affective
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Two pathways by which the hypothalamus sends signals involving autonomic function to the brainstem are the _____ and _____.
The ____ pathway contains the lateral hypothalamus and sends signal to ventral tegmental area(VTA). Stimulation of these areas elicit ____Â aggressive behaviors.
The ____ pathway contains the medial hypothalamus and periaqueductal gray matter (PGA). Stimulation elicits ____ aggressive behavior.
(VTA) and (PAG) are in the midbrain
Medial forebrain bundle, dorsal longitudinal fasciculus
predatory; Medial forebrain bundle
affective; dorsal longitudinal fasciculus
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The amygdala has multiple effects on aggressive behavior via the ____ and other structures.
Electrical stimulation of part of the amygdala ___ affective aggression.
Lesions in this same area ____ affective aggression.
- hypothalamus
- increases
- decreases
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This neurotransmitter may be involved in regulating aggression.
Serotonin
Decrease in serotonin=Increase in Aggression
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