2006
DOI: 10.1016/j.schres.2006.06.004
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Bipolar and schizophrenic patients differ in patterns of visual motion discrimination

Abstract: Background-Since Kraepelin's early distinction between bipolar disorder and schizophrenia, it has been assumed that these disorders represent two different pathophysiological processes, although they share many clinical symptoms. Previous studies showed that velocity discrimination, a sensitive psychophysiological measure of the visual motion system, is deficient in schizophrenia. Here we examined whether the motion processing impairment found in schizophrenia also occurs in bipolar disorder.

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Cited by 39 publications
(34 citation statements)
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References 43 publications
(42 reference statements)
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“…The finding of greater than normal coherence within the V1 component in bipolar disorder suggests that the inappropriate recruitment of posterior cortical regions into large-scale neural networks is not restricted to the DMN in this condition. This suggestion is also consistent with previous findings of visual processing abnormalities in bipolar disorder (Chen et al, 2006; Miller et al, 2003). …”
Section: Discussionsupporting
confidence: 93%
“…The finding of greater than normal coherence within the V1 component in bipolar disorder suggests that the inappropriate recruitment of posterior cortical regions into large-scale neural networks is not restricted to the DMN in this condition. This suggestion is also consistent with previous findings of visual processing abnormalities in bipolar disorder (Chen et al, 2006; Miller et al, 2003). …”
Section: Discussionsupporting
confidence: 93%
“…However, when considering thousands of risk-conferring alleles, as reflected in the PGR-BD score, we found that their additive effect on the facial affect network involved primarily the recruitment of visual cortical regions. These findings add to the growing evidence of visual information processing abnormalities in patients with BD observed in visual backward masking (McClure, 1999), vernier acuity (Kéri et al, 2005), motion discrimination (Chen et al, 2006, O'Bryan et al, 2014), context modulation (Yang et al, 2013) and early visual evoked potentials (Yeap et al, 2009). It is suggested therefore that abnormalities in early sensory processing of affective visual stimuli may contribute to inadequate emotional regulation and predispose individuals to development of the BD.…”
Section: Discussionsupporting
confidence: 63%
“…While visual motion signals were used effectively to guide catch-up saccades and to drive the onset of pursuit responses, reduced open loop gain in psychotic bipolar and schizophrenia patients provides evidence of a diminished capacity for using this motion information for sensorimotor transformations in the pursuit system. These findings, together with a reduced capacity to use feedback about tracking error to dynamically adjust pursuit responses during the ramp tasks, indicate that alterations in sensorimotor transformation processes represent important causes of pursuit impairments in schizophrenia and psychotic bipolar disorder (9,31). …”
Section: Discussionmentioning
confidence: 98%