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As a rule of thumb, one could say that each cytoarchitectonic field that contributes to the commissural projection also has a parallel associational fiber that terminates in the ipsilateral hippocampus. [25] The inner molecular layer of dentate gyrus (dendrites of both granule cells and GABAergic interneurons) receives a projection that has ...
The dentate gyrus, like the hippocampus, consists of three distinct layers: an outer molecular layer, a middle granule cell layer, and an inner polymorphic layer. [14] (In the hippocampus the outer layer is the molecular layer, the middle layer is the pyramidal layer, and the inner layer the stratum oriens.) The polymorphic layer is also the ...
In a cross-section of the hippocampus, including the dentate gyrus, several layers will be shown. The dentate gyrus has three layers of cells (or four if the hilus is included). The layers are from the outer in – the molecular layer, the inner molecular layer, the granular layer, and the hilus. The CA3 in the hippocampus proper has the ...
The hippocampal subfields are four subfields CA1, CA2, CA3, and CA4 that make up the structure of the hippocampus.Regions described in the hippocampus are the head, body, and tail, and other hippocampal subfields include the dentate gyrus, the presubiculum, and the subiculum.
The subgranular zone (in rat brain). (A) Regions of the dentate gyrus: the hilus, subgranular zone (sgz), granule cell layer (GCL), and molecular layer (ML). Cells were stained for doublecortin (DCX), a protein expressed by neuronal precursor cells and immature neurons. (B) Closeup of subgranular zone, located between the hilus and GCL.
The stratum lucidum of the hippocampus is a layer of the hippocampus between the stratum pyramidale and the stratum radiatum. It is the tract of the mossy fiber projections, both inhibitory and excitatory from the granule cells of the dentate gyrus. One mossy fiber may make up to 37 connections to a single pyramidal cell, and innervate around ...
The dendrite branches project throughout the entire molecular layer, and the furthest tips of the dendritic tree end at the hippocampal fissure or at the ventricular surface. [4] The granule cells are tightly packed in the granular cell layer of the dentate gyrus.
Diagram of a Timm-stained cross-section of the mouse hippocampus. The hippocampal subregion CA3–CA4 is indicated in black, stippled, and hatched areas. Black areas: suprapyramidal (SP), intra- and infrapyramidal (IIP) and hilar (CA4) mossy fiber terminal fields originating from the dentate gyrus. Stippled area: strata oriens (OR) and radiatum ...