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Lecture 4

PSYCH 1XX3 Lecture Notes - Lecture 4: Capgras Delusion, Amygdala, Hemispatial Neglect

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Joe Kim

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February 4, 2013
- The Man Who Mistook His Wife for a Hat
- The Case of the Imposter Syndrome:
David had an accident and was in a coma for 5 years. When his parents come to
visit him in the hospital, he seems on edge although he is normal in all other
The reason he’s on edge with his parents is because he thinks they look like his
parents but they’re not (maybe they are highly trained actors – fully convinced)
There is definitely an emotional component because he doesn’t feel the
same emotional attachment that he used to
Could be the fact that he saw the parents first before hearing them
REASON: The common explanation for this was Freudian: David had an
unconscious attraction to his mother and now he damaged his head and
the feelings he used to have make him confused as to how to react
Neurons in the FFG (Fusion-Formed…) respond to faces. The amygdala
assesses the emotional significance of a stimulus.
When you see a person that you care about, you have a rush of
good feelings. In the Capgras Delusion, the person can recognize
who they are seeing but the flood of emotional feelings that is
associated with recognition is no longer present.
Because of the fact that David feels no emotional attachment to
these people who look like his parents, he thinks they’re imposters
People with Capgras Delusion have:
1. Recognition without emotion
2. Delusion does not occur with auditory stimuli
3. Brain creates a running narrative to explain stimuli and events
- Experiment in which people were told that there are Type I and Type II hearts and were
asked to put their arms in a bath tub full of ice for as long as they could.
One group was told that they should have Type II which means they would end
up being even more sensitive to the cold after the experiment
Other group was told its better to become tolerant so they would be better after
the experiment.
Results show that those who were told cold tolerance is healthy stayed in the
cold for 12-13 seconds longer
- The Case of Ignoring half the world:
People were asked to stand in a square and describe everything they see from
memory. They described everything on the right side and when asked to do it
from the opposite side, they still did the right side. They did both sides in the end
but ignored their left both times. Why?
PARIETAL LOBE: This condition is called hemispatial neglect and is
associated with damage to the parietal lobe. The parietal lobe is helping
you build a spatial layout of the world
Peggy had damage to the right side of the lobe from a stroke. This part of
the brain had tissue damage and died. She brushes hair on right side of
her face, puts makeup on half, only eats from right side of plate
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