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Gamma Frequency and the Spatial Tuning of Primary Visual Cortex.

التفاصيل البيبلوغرافية
العنوان: Gamma Frequency and the Spatial Tuning of Primary Visual Cortex.
المؤلفون: Sarah Gregory, Marco Fusca, Geraint Rees, D Samuel Schwarzkopf, Gareth Barnes
المصدر: PLoS ONE, Vol 11, Iss 6, p e0157374 (2016)
بيانات النشر: Public Library of Science (PLoS), 2016.
سنة النشر: 2016
المجموعة: LCC:Medicine
LCC:Science
مصطلحات موضوعية: Medicine, Science
الوصف: Visual stimulation produces oscillatory gamma responses in human primary visual cortex (V1) that also relate to visual perception. We have shown previously that peak gamma frequency positively correlates with central V1 cortical surface area. We hypothesized that people with larger V1 would have smaller receptive fields and that receptive field size, not V1 area, might explain this relationship. Here we set out to test this hypothesis directly by investigating the relationship between fMRI estimated population receptive field (pRF) size and gamma frequency in V1. We stimulated both the near-center and periphery of the visual field using both large and small stimuli in each location and replicated our previous finding of a positive correlation between V1 surface area and peak gamma frequency. Counter to our expectation, we found that between participants V1 size (and not PRF size) accounted for most of the variability in gamma frequency. Within-participants we found that gamma frequency increased, rather than decreased, with stimulus eccentricity directly contradicting our initial hypothesis.
نوع الوثيقة: article
وصف الملف: electronic resource
اللغة: English
تدمد: 1932-6203
العلاقة: http://europepmc.org/articles/PMC4928794?pdf=renderTest; https://doaj.org/toc/1932-6203Test
DOI: 10.1371/journal.pone.0157374
الوصول الحر: https://doaj.org/article/fc283689b3b54d4cbd203b5dde7355b4Test
رقم الانضمام: edsdoj.fc283689b3b54d4cbd203b5dde7355b4
قاعدة البيانات: Directory of Open Access Journals
الوصف
تدمد:19326203
DOI:10.1371/journal.pone.0157374