eprintid: 10093958
rev_number: 24
eprint_status: archive
userid: 608
dir: disk0/10/09/39/58
datestamp: 2020-03-25 16:43:32
lastmod: 2021-09-24 22:08:19
status_changed: 2020-08-13 16:21:18
type: article
metadata_visibility: show
creators_name: Binetti, N
creators_name: Tomassini, A
creators_name: Friston, K
creators_name: Bestmann, S
title: Uncoupling Sensation and Perception in Human Time Processing
ispublished: pub
divisions: UCL
divisions: B02
divisions: C07
divisions: D07
divisions: F84
divisions: F83
note: Copyright © 2020 Massachusetts Institute of Technology. Published under a Creative Commons Attribution 4.0 International (CC BY 4.0) license.
abstract: Timing emerges from a hierarchy of computations ranging from early encoding of physical duration (time sensation) to abstract time representations (time perception) suitable for storage and decisional processes.However, the neural basis of the perceptual experience of time remains elusive. To address this, we dissociate brain activity uniquely related to lower-level sensory and higher-order perceptual timing operations, using eventrelated fMRI. Participants compared subsecond (500 msec) sinusoidal gratings drifting with constant velocity (standard) against two probe stimuli: (1) control gratings drifting at constant velocity or (2) accelerating gratings, which induced illusory shortening of time. We tested two probe intervals: a 500-msec duration (Short) and a longer duration required for an accelerating probe to be perceived as long as the standard (Long—individually determined). On each trial, participants classified the probe as shorter or longer than the standard. This allowed for comparison of trials with an “Objective” (physical) or “Subjective” (perceived) difference in duration, based on participant classifications. Objective duration revealed responses in bilateral early extrastriate areas, extending to higher visual areas in the fusiform gyrus (at more lenient thresholds). By contrast, Subjective duration was reflected by distributed responses in a cortical/subcortical areas. This comprised the left superior frontal gyrus and the left cerebellum, and a wider set of common timing areas including the BG, parietal cortex, and posterior cingulate cortex. These results suggest two functionally independent timing stages: early extraction of duration information in sensory cortices and Subjective experience of duration in a higher-order cortical–subcortical timing areas.
date: 2020-07
date_type: published
official_url: https://doi.org/10.1162/jocn_a_01557
oa_status: green
full_text_type: pub
language: eng
primo: open
primo_central: open_green
verified: verified_manual
elements_id: 1773450
doi: 10.1162/jocn_a_01557
lyricists_name: Bestmann, Sven
lyricists_name: Friston, Karl
lyricists_id: SBEST86
lyricists_id: KJFRI52
actors_name: Flynn, Bernadette
actors_id: BFFLY94
actors_role: owner
full_text_status: public
publication: Journal of Cognitive Neuroscience
volume: 32
number: 7
pagerange: 1369-1380
event_location: United States
citation:        Binetti, N;    Tomassini, A;    Friston, K;    Bestmann, S;      (2020)    Uncoupling Sensation and Perception in Human Time Processing.                   Journal of Cognitive Neuroscience , 32  (7)   pp. 1369-1380.    10.1162/jocn_a_01557 <https://doi.org/10.1162/jocn_a_01557>.       Green open access   
 
document_url: https://discovery.ucl.ac.uk/id/eprint/10093958/7/Bestmann_jocn_a_01557.pdf