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Human middle temporal cortex, perceptual bias, and perceptual memory for ambiguous three-dimensional motion

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posted on 2023-06-08, 14:34 authored by Jan W Brascamp, Ryota Kanai, Vincent Walsh, Raymond van Ee
When faced with inconclusive or conflicting visual input human observers experience one of multiple possible perceptions. One factor that determines perception of such an ambiguous stimulus is how the same stimulus was perceived on previous occasions, a phenomenon called perceptual memory. We examined perceptual memory of an ambiguous motion stimulus while applying transcranial magnetic stimulation (TMS) to the motion-sensitive areas of the middle temporal cortex (hMT+). TMS increased the predominance of whichever perceptual interpretation was most commonly reported by a given observer at baseline, with reduced perception of the less favored interpretation. This increased incidence of the preferred percept indicates impaired long-term buildup of perceptual memory traces that normally act against individual percept biases. We observed no effect on short-term memory traces acting from one presentation to the next. Our results indicate that hMT+ is important for the long-term buildup of perceptual memory for ambiguous motion stimuli.

History

Publication status

  • Published

File Version

  • Published version

Journal

Journal of Neuroscience

ISSN

0270-6474

Publisher

Society for Neuroscience

Issue

2

Volume

30

Page range

760-766

Department affiliated with

  • Psychology Publications

Full text available

  • Yes

Peer reviewed?

  • Yes

Legacy Posted Date

2013-03-11

First Open Access (FOA) Date

2016-03-22

First Compliant Deposit (FCD) Date

2016-11-10

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