Topic: communication subspaces

Neural computations underlying complex behavior implicate multiple brain regions and large-scale, multi-site recordings from behaving animals are becoming increasingly common. Based on simultaneous recordings across the visual cortex (V1, V2, and V4), a recent hypothesis posits that brain regions communicate through low-dimensional subspaces [Semedo et al. (2019, 2021)]. In particular, it was found that these communication subspaces are not fully aligned with the internal variability of individual areas, with some information remaining in a private subspace and the rest being communicated thr

Visual perception emerges from intricate interactions among neuronal populations across the brain's sensory processing hierarchy. Neuronal correlations in the visual cortex can be modulated by both external visual stimuli and internal states. Recent studies emphasize the role of communication subspaces as a population-level routing mechanism that serve as “channels” for transmitting information, facilitating coordinated activity across brain areas (e.g., V1-V2) or between cortical layers (e.g., input-superficial). It is however not known if this co-ordinated activity has directed or shared ori