Topic: principal component dimensions

A quantitative characterization of brain-wide activity imposes strong constraints on mechanistic models that link neural circuit connectivity, brain dynamics, and behavior. Here, we analyze whole-brain calcium activity in larval zebrafish captured by fast light-field volumetric imaging during hunting behavior. We found that the brain-wide activity is distributed across many principal component dimensions described by the covariance spectrum. Intriguingly, this spectrum shows an invariance to spatial subsampling. That is, the distribution of eigenvalues of a smaller and randomly sampled cell as