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Adaptation reveals multi-stage coding of visual duration
Heron, James Fulcher, Corinne Collins, Howard Whitaker, David J. Roach, N.W.
Heron, James
Fulcher, Corinne
Collins, Howard
Whitaker, David J.
Roach, N.W.
Publication Date
28/02/2019
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© The Author(s) 2019. Open Access This article is licensed under a Creative Commons Attribution 4.0 International
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openAccess
Accepted for publication
16/11/2018
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Abstract
In conflict with historically dominant models of time perception, recent evidence suggests that the
encoding of our environment’s temporal properties may not require a separate class of neurons whose
raison d'être is the dedicated processing of temporal information. If true, it follows that temporal
processing should be imbued with the known selectivity found within non-temporal neurons. In the
current study, we tested this hypothesis for the processing of a poorly understood stimulus parameter:
visual event duration. We used sensory adaptation techniques to generate duration aftereffects:
bidirectional distortions of perceived duration. Presenting adapting and test durations to the same vs
different eyes utilises the visual system’s anatomical progression from monocular, pre-cortical neurons
to their binocular, cortical counterparts. Duration aftereffects exhibited robust inter-ocular transfer
alongside a small but significant contribution from monocular mechanisms. We then used novel stimuli
which provided duration information that was invisible to monocular neurons. These stimuli generated
robust duration aftereffects which showed partial selectivity for adapt-test changes in retinal disparity.
Our findings reveal distinct duration encoding mechanisms at monocular, depth-selective and depthinvariant
stages of the visual hierarchy.
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Published version
Citation
Heron J, Fulcher C, Collins H et al (2019) Adaptation reveals multi-stage coding of visual duration. Scientific Reports. 9: Article number 3016.
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Article