The magnitude of neural responses in sensory cortex depends on the intensity of a stimulus and its probability of being observed within the environment. How these two variables combine to influence the overall response of cortical populations remains unknown. Here we show that, in primary visual cortex, the vector magnitude of the population response is described by a separable power-law that factors the intensity of a stimulus and its probability.
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http://dx.doi.org/10.1101/2023.10.06.561309 | DOI Listing |
Sci Rep
January 2025
Neurocomputation and Neuroimaging Unit (NNU), Freie Universität Berlin, Berlin, Germany.
We are not only passively immersed in a sensorial world, but we are active agents that directly produce stimulations. Understanding what is unique about sensory consequences can give valuable insight into the action-perception-cycle. Sensory attenuation is the phenomenon that self-produced stimulations are perceived as less intense compared to externally-generated ones.
View Article and Find Full Text PDFExp Brain Res
January 2025
Dept. of Neurosurgery, Upstate Medical University, 750 E. Adams St, Syracuse, NY, 13210, USA.
Transcranial magnetic stimulation (TMS) has been used for many years to study the pathophysiology of amyotrophic lateral sclerosis (ALS). Based on single- or dual-pulse TMS and EMG and/or single motor unit (MU) recordings, many groups have described a loss of central inhibition as an early marker of ALS dysfunction, reflecting a state of cortical 'hyperexcitability'. This conclusion is not without its detractors, however, leading us to reexamine this issue using 4-pulse TMS, shown previously to be more effective for testing central motor pathway functional integrity.
View Article and Find Full Text PDFSci Rep
January 2025
Graduate School of Health Sciences, Hokkaido University, Sapporo, Japan.
Subjective confidence and uncertainty are closely related to cognition and behavior. However, direct evidence that subjective confidence controls attention allocation is lacking. This study aimed to clarify whether subjective confidence could be involved in controlling attention allocation and intensity.
View Article and Find Full Text PDFBrain Cogn
January 2025
Department of Nursing, Air Force Medical University, Xi'an, China. Electronic address:
The present study focused on the influence of training methods and task difficulty on event-related potentials (ERPs) at early and later visual perceptual learning (VPL) on a coherent motion identification task. Sixty participants were randomly divided into four groups for training with an adaptive stimulus (staircase group) and three constant stimuli (moderate, easy and difficult intensity groups). Visual performance improved in the staircase and moderate training groups but not in the easy or difficult training groups.
View Article and Find Full Text PDFBiomedica
December 2024
Laboratorio de Inmunodeficiencias, Instituto Nacional de Pediatría, Ciudad de México, México.
Introduction: Chronic granulomatous disease is a defect in phagocytosis due to deficiency of gp91phox, p22phox, p47phox, p40phox, and p67phox (classic form of the disease). Recently, EROS and p40phox deficiency were described as responsible for the non-classical form of the disease. The 1,2,3-dihydrorhodamine oxidation technique, with phorbol-12-myristate-13-acetate as a stimulus, is performed to diagnose the classic chronic granulomatous disease.
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