Unformatted text preview: it becomes the ﬁnal arbitrator. LeDoux, 1996! The Implicit Nature of Fear Conditioning in Humans!
Galvanic skin responses are
recorded from humans as they
learn that a blue square is
associated with an electric shock.
Normal subjects show a fearful
response to both the
unconditioned electric shock and
the conditioned blue square.
Amygdala patients show a fearful
response to the unconditioned
electric shock, but not to the
conditioned blue square. Phelps, 1998!
Study that was done by shocking human subjects. What was measured was the galvanic skin response in order to measure fear. Normally when a person sees a
blue square paired w/ electrical response over multiple trials, they have a small physiological response prior to the shock. Patients who have damage to the
amygdala like patient S.M. or S.B. would have the same physiological response, but wouldn't have the conditioned blue square response. If asked, they are
cognitively aware that every time a blue square appears, they are aware it means they will be shocked, but do not get the conditioned response. The main
function of the amygdala appears to build these associations between fearful physiological response and things out there in the environment. What happens when
those pathways become disconnected from the amydgala? Next Slide A ﬂattening of emotions can occur when access
to or from the amygdala is interrupted.! Capgras Syndrome:!
The delusion that others, or the self, have been replaced by
impostors. It typically follows the development of negative
feelings toward the other person that the subject cannot accept
and attributes, instead, to the impostor. !
http://www.youtube.com/watch?v=dqBGzkz1oDU! Connections from the TML to the amygdala disrupted results in Capgras Syndrome. What is interesting is as soon as he hears his mother's voice, or has
other pathways to the amygdala. When he sees a picture, he can't accept that as his mother. The limbic system amygdala
orbitofrontal cortex Not only is the amygdala is necessary for doing this things, but having access to the am...
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This note was uploaded on 01/18/2014 for the course PSY 123 taught by Professor Staff during the Fall '11 term at UCSB.
- Fall '11