Föreläsningar och seminarier Cognitive Neuroscience Club med Freek van Ede, Vrije Universiteit in Amsterdam, Nederländerna

2024-05-28 16:00 Add to iCal

"Oscillatory brain activity in the human somato-motor system during somatosensory anticipation, working memory, and action"

Cognitive Neuroscience Club bjuder in till en föreläsning på temat kognitiv neurovetenskap. Tisdagen den 30 april 2024 välkomnar vi Professor Freek van Ede, Vrije Universiteit in Amsterdam, Nederländerna.

Abstrakt (på engelska)

I will start my talk by showing how anticipating a task-relevant somatosensory input at the hand is associated with a selective attenuation of 8-30 Hz alpha- and beta activity in the contralateral somatosensory cortex. I will show how this phenomenon tunes-in to the time at which a touch stimulus is expected and how its orienting time course matches the time course of attentional facilitation in touch accuracy. I will go on to show how prior anticipation may increase ensuing recruitment of the ipsilateral somatosensory cortex, putatively increasing the distribution of somatosensory processing. I will show how attenuated alpha/beta activity also tracks working-memory retention of touch, and how alpha/beta attenuation is replaced by the contralateral amplification of gamma oscillations during the selective processing of a continuous somatosensory input stream. I will finally turn to two relevant properties of somato-motor beta activity. First, I will show how the attenuation of beta activity is not limited to the somatosensory system, but propagates all the way down to the forearm muscles – even when no manual response is required. Second, I will show how somato-motor beta activity is best thought of as transient bursts, rather than amplitude-varying sustained oscillations – even during sustained somato-motor demands. Collectively, these findings portray the status of the field of MEG studies on brain oscillations in the somato-motor system through the aged lens of my PhD research.


Xavier Job Postdoktor