Psy 123_Lec 13 Emotion

Ledoux 1996 the implicit nature of fear conditioning

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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 The delusion that others, or the self, have been replaced by impostors.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. !! 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.

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