Conference
Brain correlates of perceptual switch during perception rivalry: an ultra-high field 7T functional magnetic resonance imaging study
| العنوان: | Brain correlates of perceptual switch during perception rivalry: an ultra-high field 7T functional magnetic resonance imaging study |
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| المؤلفون: | Mortazavi, Nasrin, Koshmanova, Ekaterina, Sharifpour, Roya, Berger, Alexandre, Paparella, Ilenia, Campbell, Islay, Beckers, Elise, Talwar, Puneet, Sherif, Siya, Vandewalle, Gilles |
| المساهمون: | GIGA CRC (Cyclotron Research Center) In vivo Imaging-Aging & Memory - ULiège |
| المصدر: | The Brain Conference, 24-25 February 2022 |
| سنة النشر: | 2022 |
| مصطلحات موضوعية: | Human health sciences, Sciences de la santé humaine |
| الوصف: | IntroductionPerceptual rivalry while viewing ambiguous stimulus leads to repetitive switches between two perceptions of the same image1. Switches are considered to recruit bottom-up and top-down attentional processes. We aimed to investigate the neural mechanisms of perceptual switch using high resolution ultra-high-field 7-Tesla MRI.Methods35 healthy subjects (18-70y; 28 women) were recruited. FMRI (voxel size 1.4 mm³) was recorded for 10 minutes while participants viewed a Necker cube 2 (10s breaks every minute). Subjects were instructed to report switch of their perception by pressing a button. ResultsPerceptual switches were associated with increased activation in the bilateral intraparietal sulcus (which is involved in attention), the insula (part of the salience network), the occipital cortex (including in an area compatible with V4, involved in shape detection), the left motor cortex, and the right cerebellum (whole-brain FWE corrected p<.05) (Fig1).ConclusionsWe report neural substrates compatible with the top-down and bottom-up attentional processes involved in resolving perceptual rivalry. Our results further suggest that perceptual changes of ambiguous figures are associated with a widespread set of brain activation. Funding: FNRS, ULiège, FEDER, SAO-FRA, Wallonia-Brussels federationReferences1.Blake R, Logothetis NK. Visual competition. Nature Reviews Neuroscience. 2002;3(1):13-21. 2.Einhäuser W, Stout J, Koch C, Carter O. Pupil dilation reflects perceptual selection and predicts subsequent stability in perceptual rivalry. Proceedings of the National Academy of Sciences. 2008;105(5):1704-1709. |
| نوع الوثيقة: | conference paper not in proceedings http://purl.org/coar/resource_type/c_18cp conferencePaper peer reviewed |
| اللغة: | English |
| URL الوصول: | https://orbi.uliege.be/handle/2268/268511 |
| Rights: | open access http://purl.org/coar/access_right/c_abf2 info:eu-repo/semantics/openAccess |
| رقم الانضمام: | edsorb.268511 |
| قاعدة البيانات: | ORBi |
| الوصف غير متاح. |