It is demonstrated that persistent reactivation of large-scale neuronal assemblies underlying particular concepts is reflected in bursts of high-frequency oscillations in the human cortex.
Abstract
High gamma and ripple frequency oscillations are engaged in encoding and recall of memory traces. Tracking specific traces with their signature neural activities across time and various tasks remains a major challenge. Using intracranial electrode recordings from epilepsy patients, we detected bursts of high-frequency oscillations in response to viewing and remembering the same common nouns in two different tasks repeated on subsequent days. We found the lowest word response selectivity of approximately 40% in the visual sensory areas and increasingly higher selectivity in the more anterior associational regions. The same word sets identified as preferred in a screening task triggered selective responses in another task during visual presentation or free recall with no sensory stimulation in the same session, and on the following day. We demonstrate that persistent reactivation of large-scale neuronal assemblies underlying particular concepts is reflected in bursts of high-frequency oscillations in the human cortex.
How do our brains represent events in language? Recent work has shown that when we comprehend state-change events, multiple representations corresponding to different states of an object are simultaneously activated. As the sentence unfolds and the object is cued for retrieval, areas of the brain associated with repres...
Wesley Leong, Gerry T. M. Altmann· Brain and Language· 0 citations
Neural activity reflects both external stimuli and the brain’s internal state, which shapes how information is processed and perceived. For example, in phase-precession in the hippocampus, the phase of theta oscillations affects the firing of single neurons (place cells) and its relation to the external world. Here,...
Laura Masaracchia, Pablo Oyarzo, Felipe Fredes et al.· Communications Biology· 0 citations
Despite decades of animal and human intracranial work highlighting the critical role theta oscillations (4-12 Hz) play in memory encoding and recall stage during navigation, the link between scalp recorded human theta oscillations and spatial encoding and recall is lacking. In the present study, we used right posterior...
Malte R. Güth, Travis E. Baker· International Journal of Psy...· 0 citations
Working memory enables the maintenance of information to guide behavior, yet its representations are inherently noisy and variable. To act effectively, observers must track the uncertainty of their own memory. However, the neural mechanisms supporting uncertainty representations in working memory remain poorly understo...
Yang Di, Xing-Wei An, Hsin-Hung Li· Current Biology· 0 citations
It is suggested that rhythmic activity in the striatum is more closely linked to motor preparation, whereas cerebellar activity provides a more movement-invariant representation that may contribute to the formation of an internal model of rhythmic stimulus sequence.
Masashi Kameda, Masaki Tanaka· Journal of Neuroscience· 0 citations
Temporal response function analyses reveal that avalanche activity reliably encodes both speech and music stimuli, even under extreme data sparsification, and demonstrate that neuronal avalanches provide a computationally efficient framework for studying cognition in naturalistic settings.
Matteo Neri, C. Runfola, P. Guilleminot et al.· Imaging neuroscience· 0 citations
We use cookies to run the site and, with your consent, for analytics and to show ads.
See our Cookie Policy.
