.png){kind=icon}
.png){kind=icon}
Return
Attentional fluctuations induce shared variability in macaque primary visual cortex
.png){kind=icon}
OA
AI
DOI：10.1038/s41467-018-05123-6.png)
.png){kind=icon}
.png){kind=icon}
Share.png){kind=icon}
Save
Abstract
En 中文
Variability in neuronal responses to identical stimuli is frequently correlated across a population. Attention is thought to reduce these correlations by suppressing noisy inputs shared by the population. However, even with precise control of the visual stimulus, the subject's attentional state varies across trials. While these state fluctuations are bound to induce some degree of correlated variability, it is currently unknown how strong their effect is, as previous studies generally do not dissociate changes in attentional strength from changes in attentional state variability. We designed a novel paradigm that does so and find both a pronounced effect of attentional fluctuations on correlated variability at long time-scales and attention-dependent reductions in correlations at short timescales. These effects predominate in layers 2/3, as expected from a feedback signal such as attention. Thus, significant portions of correlated variability can be attributed to fluctuations in internally generated signals, like attention, rather than noise.
Keywords:
FIXATIONAL EYE-MOVEMENTS
AREA V4
SPATIAL ATTENTION
STRIATE CORTEX
CORRELATED VARIABILITY
PSYCHOMETRIC FUNCTION
NEURONAL VARIABILITY
RESPONSE VARIABILITY
CORTICAL CONNECTIONS
POPULATION ACTIVITY
AI Summary
Key information extracted from the uploaded paper, including a brief overview, abstract, background, key highlights, visual analysis, and future outlook.
Journal
IF:
15.7
Papers:
9.3W
Citations:
91.2W