Visual timing-tuned responses in human association cortices and response dynamics in early visual cortex

Evi Hendrikx, Jacob M. Paul, Martijn Ackooij, Nathan Stoep and Ben M. Harvey ()
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Evi Hendrikx: Utrecht University
Jacob M. Paul: Utrecht University
Martijn Ackooij: Utrecht University
Nathan Stoep: Utrecht University
Ben M. Harvey: Utrecht University

Nature Communications, 2022, vol. 13, issue 1, 1-19

Abstract: Abstract Quantifying the timing (duration and frequency) of brief visual events is vital to human perception, multisensory integration and action planning. Tuned neural responses to visual event timing have been found in association cortices, in areas implicated in these processes. Here we ask how these timing-tuned responses are related to the responses of early visual cortex, which monotonically increase with event duration and frequency. Using 7-Tesla functional magnetic resonance imaging and neural model-based analyses, we find a gradual transition from monotonically increasing to timing-tuned neural responses beginning in the medial temporal area (MT/V5). Therefore, across successive stages of visual processing, timing-tuned response components gradually become dominant over inherent sensory response modulation by event timing. This additional timing-tuned response component is independent of retinotopic location. We propose that this hierarchical emergence of timing-tuned responses from sensory processing areas quantifies sensory event timing while abstracting temporal representations from spatial properties of their inputs.

Date: 2022
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DOI: 10.1038/s41467-022-31675-9

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