State-dependent population activity, dimensionality and communication in the visual cortex
Aitor Morales-Gregorio, Anno Kurth, Junji Ito, Alexander Kleinjohann, Frédéric Barthélemy, Thomas Brochier, Sonja Grün, Sacha van Albada · Bernstein Conference 2024
Brain activity depends on ongoing behavioural and arousal states, such as attention, eye closure, or sleep. These states display measurable differences in population activity [1], dimensionality [2], noise correlations [3], and autocorrelation timescales [4]. State-dependent changes in the primary visual cortex (V1) are potentially induced by cortico-cortical signals, such as those from V4 to V1, known to mediate visual attention in macaques [5]. However, relationships between such top-down signals and the aforementioned state-dependent changes have not been demonstrated directly. To investig