A diagram depicting the connectivity, where neurons are represented as points, and neurons with more similar connectivity are plotted closer together. Lines depict connections between neurons.

An example Sst Chordl cell (left) shows dense projections to cortical layer 6, while another inhibitory subtype, Sst Hpse Cbln4 (right), shows dense projections to layer 4.

Researchers used advanced cryo-electron microscopy to capture atomic-level images of how glutamate, a key neurotransmitter, ...