Visual representations of time elicit early responses in human temporal cortex

NeuroImage

Claudio Campus¹  Maria Bianca Amadeo²  Monica Gori² 

[1] Department of Informatics, Bioengineering, Robotics and Systems Engineering, Università degli Studi di Genova, via all’Opera Pia, 13, 16145, Genova, Italy;U-VIP Unit for Visually Impaired People, Fondazione Istituto Italiano di Tecnologia, Via E. Melen, 83, 16152, Genova, Italy;

关键词: Auditory cortex;    EEG;    Time perception;    Multisensory integration;    Visual processing;   

DOI  :  

来源: DOAJ

【 摘 要 】

Time perception is inherently part of human life. All human sensory modalities are always involved in the complex task of creating a temporal representation of the external world. However, when representing time, people primarily rely on auditory information. Since the auditory system prevails in many audio-visual temporal tasks, one may expect that the early recruitment of the auditory network is necessary for building a highly resolved and flexible temporal representation in the visual modality. To test this hypothesis, we asked 17 healthy participants to temporally bisect three consecutive flashes while we recorded EEG. We demonstrated that visual stimuli during temporal bisection elicit an early (50–90 ​ms) response of an extended area of the temporal cortex, likely including auditory cortex too. The same activation did not appear during an easier spatial bisection task. These findings suggest that the brain may use auditory representations to deal with complex temporal representation in the visual system.

【 授权许可】

Unknown