08 Emotion

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08 Emotion
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General Overview

• What is emotion ?
• Historical foundations
• Current approaches

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Historical Foundations

• Darwin and comparative analysis
• James-Lange
• Cannon-Bard
• Limbic System concept and J.W.Papez
• Kluver-Bucy Syndrome

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Darwin and comparative analysis

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Facial expression and emotion
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James-Lange v.s. Cannon-Bard

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James-Lange v.s. Cannon-Bard

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James-Lange v.s. Cannon-Bard

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Limbic System concept

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Papez Circuit

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Kluver-Bucy Syndrome

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Kluver-Bucy Syndrome

• Removed anterior temporal lobe
• Changes in emotional reactivity
• Psychic blindness
• Hypersexuality
• Abnormal social behavior
• Comparable effects can be seen in humans
• with amygdala damage

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Human Amygdala
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Rat Amygdala
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Amygdala Targets/Effectors

The amygdala (especially the central nucleus)
projects to many other brain regions that are
important for the expression of emotions.
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Rat Amygdala - Experiments

• The amygdala is important for expressing fear of
  innate or learned danger stimuli.
• Lesion studies
• Unit recording
• Pharmacology

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Fear learning
Procedure commonly used to study both memory and
emotion in laboratory animals
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Fear Response Circuit

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Studies with Human Subjects

• Patients with amygdala damage
• -Perception versus Expression
• -Emotional memories
• Functional imaging
• -Facial expressions
• -Fear learning
• -Reward learning

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Studies with Human Subjects

Amygdala Lesion
Hippocampal Lesion
Hippocampus Amygdala Lesion
From Bechara, et al (1995)
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Studies with Human Subjects

Activation of the human amygdala using a visual
signal for shock