Hippocampal Layers
Hippocampal Layers - Related Videos
08:20
Organotypic Hippocampal Slice Cultures
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Cited by 52 •
2011
We describe a method to prepare organotypic hippocampal slices that can be easily adapted to other brain regions. Brain slices are laid on porous membranes and culture media is allowed to form an interface. This method preserves the gross architecture of the hippocampus for up to 2 weeks in culture.
17:46
Low-Density Primary Hippocampal Neuron Culture
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Cited by 15 •
2017
This article describes the protocol for culturing low-density primary hippocampal neurons growing on glass coverslips inverted over a glial monolayer. The neuron and glial layers are separated by paraffin wax beads. The neurons grown by this method are suitable for high-resolution optical imaging and functional assays.
05:13
Co-culturing of Ventral Hippocampal and Nucleus Accumbens
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2025
This video demonstrates the process of preparing ventral hippocampal and nucleus accumbens tissues from mouse brains for co-culture. Neurons extend projections to form synaptic connections between the ventral hippocampal and nucleus accumbens tissues. This method allows studying neuronal interactions between these two brain regions, offering insights into cognition, behavior, and neurological disorders.
03:07
Thin-Layer Chromatography - Concepts
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2020
Chromatography Chromatography is a technique used in organic chemistry to separate compounds in a mixture based on their differences in solubility between two different phases. The concept is similar to liquid-liquid extraction, except in chromatography, the two phases consist of the stationary phase and the mobile phase. The stationary phase is a solid — typically a microscale hydrogel bead — while the mobile phase is a carrier solvent. In traditional chromatography, the stationary phase is...
09:56
Layer-by-layer Collagen Deposition in Microfluidic Devices for Microtissue Stabilization
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Cited by 7 •
2015
The creation of functional microtissues within microfluidic devices requires the stabilization of cell phenotypes by adapting traditional cell culture techniques to the limited spatial dimensions in microdevices. Modification of collagen allows the layer-by-layer deposition of ultrathin collagen assemblies that can stabilize primary cells, such as hepatocytes, as microfluidic tissue models.
FAQs
Layer identity helps distinguish where signals are received, relayed, and projected. The molecular region is associated with incoming entorhinal cortex input, the granule cell region contains the dentate gyrus granule-cell relay, and the pyramidal cell region contains CA3 and CA1 neurons. Together with the radiatum region, these zones provide an anatomical framework for analyzing hippocampal connectivity.
The circuit follows an organized sequence rather than an undifferentiated spread of activity. Entorhinal cortex signals reach dentate gyrus granule cells through the perforant path, granule cells relay information to CA3 through mossy fibers, and CA3 communicates with CA1 through Schaffer collaterals. This directionality lets researchers relate specific layers to successive stages of memory and spatial processing.
These pathways connect different stages of the hippocampal network. Mossy fibers carry signals from dentate gyrus granule cells to CA3 pyramidal neurons, whereas Schaffer collaterals carry projections from CA3 to CA1. Distinguishing the two helps researchers determine whether a question concerns dentate-to-CA3 relay or CA3-to-CA1 communication when examining hippocampal organization.
The arrangement links physical organization with directed circuit activity. Because distinct cellular and fiber zones participate in successive connections, researchers can examine how signals move through the hippocampus while relating that movement to synaptic plasticity, memory encoding, learning, and spatial navigation. The same organization also provides a framework for studying how altered circuitry may relate to neurological disorders.
Researchers can use the layer-specific circuit arrangement to relate incoming cortical information to defined relay points in the dentate gyrus, CA3, and CA1. Mapping these connections supports studies of memory formation, encoding, learning, and spatial navigation. It also allows investigations to focus on how synaptic plasticity may affect particular stages of hippocampal information processing.
Their organization gives researchers a structured way to examine disease-related changes in hippocampal circuitry. Because the layers separate cellular regions and directed fiber pathways, studies can relate neurological disorders to specific parts of the entorhinal cortex, dentate gyrus, CA3, or CA1 circuit. The overview identifies epilepsy and Alzheimer’s disease as important contexts for this investigation.