Sounds reset rhythms of visual cortex and corresponding human visual perception.
Bottom Line: In principle, this may result in stimulus-locked periodicity in behavioral performance.Here we considered this possible cross-modal impact of a sound for one of the best-characterized rhythms arising from the visual system, namely occipital alpha-oscillations (8-14 Hz).This shows that cross-modal phase locking of oscillatory visual cortex activity can arise in the human brain to affect perceptual and EEG measures of visual processing in a cyclical manner, consistent with occipital alpha oscillations underlying a rapid cycling of neural excitability in visual areas.
Affiliation: Institute of Neuroscience and Psychology, University of Glasgow, 58 Hillhead Street, Glasgow G12 8QB, UK. firstname.lastname@example.orgShow MeSH
Related in: MedlinePlus
Mentions: We hypothesized that a sound may phase-align oscillatory alpha activity over occipital areas (typically around 8–14 Hz) and thereby reveal cyclical influences of visual brain rhythms on subsequent visual processing. We tested this by assessing in two experiments reports of phosphene perception (using occipital transcranial magnetic stimulation [TMS] as in [10, 11]) at various time points after a critical sound (Figure 1, right panel) and by also measuring electroencephalography (EEG) in the second experiment.
Affiliation: Institute of Neuroscience and Psychology, University of Glasgow, 58 Hillhead Street, Glasgow G12 8QB, UK. email@example.com