This paper addresses the open problem of assembling multilevelled hierarchical structure. It presents a model of an infinitely-levelled, self-assembling dynamical hierarchy which arises from the interaction of geometric primary elements with a fixed complexity. A formal description of the presented hierarchy is derived. This quantifies the relative compression achieved by describing the system ...

The way the hippocampus processes information and encodes memories in the form of "cell assemblies" is likely determined in part by how its circuits are wired up during development. In this issue, Xu et al. now provide new insight into how neurons arising from a single common precursor migrate to their final destination and form functionally synchronous ensembles.

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In this essay, I engage the L.A.–Chicago debate by repositioning both area-specific constraints and visual orders as intermediary variables. This leads the discussion to two considerations that in turn reposition the meaning of the familiar differences attributed to Los Angeles and Chicago. First, a focus on the particular implications of translocal processes for an area allows us to establish ...