Lamina-specific cortical dynamics in human visual and sensorimotor cortices.
Authors of this article are:
Bonaiuto JJ, Meyer SS,, Little S, Rossiter H, Callaghan MF, Dick F, Barnes GR#, Bestmann S#.
A summary of the article is shown below:
Distinct anatomical and spectral channels are thought to play specialized roles in the communication within cortical networks. While activity in the alpha and beta frequency range (7 – 40 Hz) is thought to predominantly originate from infragranular cortical layers conveying feedback-related information, activity in the gamma range (>40 Hz) dominates in supragranular layers communicating feedforward signals. We leveraged high precision MEG to test this proposal, directly and non-invasively, in human participants performing visually cued actions. We found that visual alpha mapped onto deep cortical laminae, whereas visual gamma predominantly occurred more superficially. This lamina-specificity was echoed in movement-related sensorimotor beta and gamma activity. These lamina-specific pre- and post- movement changes in sensorimotor beta and gamma activity suggest a more complex functional role than the proposed feedback and feedforward communication in sensory cortex. Distinct frequency channels thus operate in a lamina-specific manner across cortex, but may fulfill distinct functional roles in sensory and motor processes.
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This article is a good source of information and a good way to become familiar with topics such as:
MEG;action selection;cortical laminae;feedback;feedforward;human;neuroscience
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