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Seminar Series: Thomas Whitford

Seminar Series: Thomas Whitford
Location:
Room 201-204, Level 2, McElwain (24)
Start:
3:00pm Friday, 6th June 2014
Finish:
4:00pm Friday, 6th June 2014

Speaker: Thomas Whitford (UNSW)

Topic: Distinguishing self from world in schizophrenia and schizotypy.

Abstract

Self-generated sensations typically feel less salient than externally-generated sensations, with the fact that it is difficult to tickle oneself as a well-known example. Consistent with this phenomenon, it is well-established that self-produced sensations, such as the sound of one’s own voice, evoke less activity in the electroencephalogram (EEG) than do physically identical, externally-produced sensations.

There is growing evidence to suggest that this normative process of ‘sensory self-suppression’ is abnormal in people with schizophrenia. Schizophrenia patients do not appear to exhibit the normative suppression of EEG activity to self-generated speech; that is, they do not appear to make a fundamental sensory distinction between self-generated and externally-generated stimuli. These ‘sensory self-suppression’ abnormalities have been argued to underlie some of the most bizarre yet characteristic symptoms of schizophrenia, such as delusions of control, in which patients misattribute self-generated actions to external agents.

In this talk I will review evidence from the human and animal literature for the process of ‘sensory self-suppression’, as well as the evidence that that this process is abnormal in people with schizophrenia. I will also discuss studies (both EEG and behavioural) from my own laboratory which suggest that self-suppression abnormalities may not be limited to people with established schizophrenia, but may also be present in non-clinical, highly schizotypal individuals. 

 

Accessed: 1690 times
Created: Monday, 17th March 2014 by uqpjack1
Modified: Wednesday, 28th May 2014 by uqpjack1
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