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Computation on Demand: Action-Specific Representations of Visual Task Features Arise during Distinct Movement Phases.
J Neurosci
July 2024
Department of Psychology at Scarborough, University of Toronto, Scarborough, Ontario M1C1A4, Canada
The intention to act influences the computations of various task-relevant features. However, little is known about the time course of these computations. Furthermore, it is commonly held that these computations are governed by conjunctive neural representations of the features.
View Article and Find Full Text PDFA "Feed"-Back on EEG Monitoring Artifacts.
Neurocrit Care
August 2024
Département de Neurologie, Unité de Médecine intensive - Réanimation à orientation neurologique, AP-HP, Hôpital de la Pitié-Salpêtrière, Sorbonne Université, Paris, France.
Delirium is associated with loss of feedback cortical connectivity.
Alzheimers Dement
January 2024
Department of Anaesthetics & Institute of Academic Surgery, Royal Prince Alfred Hospital, Camperdown, New South Wales, Australia.
Article Synopsis
- Post-operative delirium (POD) is linked to higher risks of complications and mortality but lacks effective treatments due to limited understanding of its causes.
- In a study with 131 patients, data from high-density electroencephalograms showed that patients with POD had reduced mismatch negativity amplitudes and altered neuronal connectivity, particularly decreased feedback from the left superior temporal gyrus to the auditory cortex.
- The findings suggest that delirium may result from increased inhibition in the brain's auditory processing pathways, leading to diminished feedback connectivity, which is associated with both the severity of delirium and levels of systemic inflammation.
Spatiotemporal dynamics across visual cortical laminae support a predictive coding framework for interpreting mismatch responses.
Cereb Cortex
July 2023
Neuroscience Institute, Georgia State University, Petit Science Center, 100 Piedmont Ave, Atlanta, GA 30303, United States.
Context modulates neocortical processing of sensory data. Unexpected visual stimuli elicit large responses in primary visual cortex (V1)-a phenomenon known as deviance detection (DD) at the neural level, or "mismatch negativity" (MMN) when measured with EEG. It remains unclear how visual DD/MMN signals emerge across cortical layers, in temporal relation to the onset of deviant stimuli, and with respect to brain oscillations.
View Article and Find Full Text PDFSpatiotemporal dynamics across visual cortical laminae support a predictive coding framework for interpreting mismatch responses.
bioRxiv
April 2023
Neuroscience Institute, Georgia State University, Petit Science Center, 100 Piedmont Ave, Atlanta, GA 30303.
Context modulates neocortical processing of sensory data. Unexpected visual stimuli elicit large responses in primary visual cortex (V1) -- a phenomenon known as deviance detection (DD) at the neural level, or "mismatch negativity" (MMN) when measured with EEG. It remains unclear how visual DD/MMN signals emerge across cortical layers, in temporal relation to the onset of deviant stimuli, and with respect to brain oscillations.
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