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Region Hovedstaden - en del af Københavns Universitetshospital
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Three weeks of SSRI administration enhances the visual perceptual threshold - a randomized placebo-controlled study

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

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Rationale
The serotonergic system has been repeatedly linked to visual attention in general, but the effects of selective serotonin reuptake inhibitor (SSRI) on specific components of visual attention remain unknown. Changes in distinct perceptual and cognitive processes are not readily evident in most attention paradigms.

Objective
In this study, we isolate basic components of visual attention to investigate potential effects of longer-term SSRI administration on non-emotional aspects of visual attention in healthy males.

Methods
In a randomized double-blind placebo-controlled design, 32 young healthy males were tested on multiple attentional parameters, before and after a 3-week SSRI intervention with fluoxetine (40 mg daily) or placebo. Data were modeled with a computational theory of visual attention to derive independent estimates of five distinct components of visual attention.

Results
The SSRI intervention selectively and significantly lowered the threshold for conscious visual perception. Specifically, we demonstrate that this improvement does not stem from a general increase in the speed of visual processing, as previously suggested, but specifically from a change in the perceptual threshold.

Conclusions
The study provides a novel description of the attentional dynamics affected by SSRI, while supporting previous findings on attentional effects of SSRI. Furthermore, it accentuates the utility of employing accuracy-based measures of attentional performance when conducting psychopharmacological research.
OriginalsprogEngelsk
TidsskriftPsychopharmacology
Sider (fra-til)1-11
Antal sider12
ISSN0033-3158
DOI
StatusUdgivet - 1 jun. 2019

ID: 57349852