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  4. Local versus global and retinotopic versus non-retinotopic motion processing in schizophrenia
 
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conference paper not in proceedings

Local versus global and retinotopic versus non-retinotopic motion processing in schizophrenia

Lauffs, Marc Michael  
•
Shaqiri, Albulena  
•
Brand, Andreas
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2016
World Psychiatry Association (WPA) Regional Congress

Schizophrenia impairs cognitive function as much as perception. For example, patients perceive global motion in random dot kinematograms less strongly, because the integration of the dots into a single Gestalt is complex (e.g., Chen, Nakayama, Levy, Matthysse, & Holzman, 2003). Similarly, the perception of apparent motion is impaired, because the filling in of the illusory trajectory requires complex processing (Saucer & Deabler, 1956). Here, we investigated very complex motion processing using the Ternus-Pikler apparent motion display. First, we tested whether the perception of global apparent motion is impaired in schizophrenics compared to healthy controls. The task required both the grouping of multiple objects into a coherent Gestalt and the filling in of its illusory motion trajectory. Second, we tested the perception of rotation in the same stimulus, which in addition required the computation of non-retinotopic motion. Contrary to earlier studies, patients were not impaired in either task and even tended to perform better than controls. We argue that deficient neuromodulation, rather than motion processing deficits, explains the differences observed in previous studies.

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Type
conference paper not in proceedings
Author(s)
Lauffs, Marc Michael  
•
Shaqiri, Albulena  
•
Brand, Andreas
•
Roinishvili, Maya
•
Chkonia, Eka
•
Öğmen, Haluk
•
Herzog, Michael H.  
Date Issued

2016

Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LPSY  
Event nameEvent placeEvent date
World Psychiatry Association (WPA) Regional Congress

Tbilisi, Georgia

April 27-30, 2016

Available on Infoscience
January 13, 2017
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/132868
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