Topic: dendritic axon origins

Principal neurons with dendritic axon origins offer privileged pathways for information flow through the hippocampal network and between brain hemispheres. Traditionally overshadowed in research, the GABAergic interneurons play a crucial role in modulating network activity. Our research leverages genetic and immunofluorescent markers to dissect the morphological variance among inhibitory neuron subpopulations, focusing on the axon initial segments (AIS) — key sites for action potential generation. Our study captures the extensive diversity of proximal interneuron morphologies within the murine

The axon initial segment (AIS) is an axonal subdomain integral to neuronal excitability, yet its geometrical diversity within the hippocampus is poorly understood. This study provides a detailed examination of the variability of proximal cell morphology across murine hippocampal neurons, analyzing molecular and geometrical parameters such as AIS length and position, dendrite shape, soma, and apical dendrite size across dorsal-ventral, superficial-deep, and proximal-distal axes. We observed significant differences in AIS characteristics, with CA3 neurons displaying longer AIS and more distal or