Hippocampal Networks
Hippocampal Networks - Related Videos
02:30
Optogenetic Control of Hippocampal Network Dynamics
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2025
This video demonstrates the method to use optogenetics to modulate hippocampal network dynamics by activating genetically modified light-sensitive interneurons in a mouse brain slice, enhancing theta oscillation synchronization and studying neural circuit behavior.
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.
07:58
Acute Mouse Brain Slicing to Investigate Spontaneous Hippocampal Network Activity
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Cited by 3 •
2020
This protocol describes the preparation of horizontal hippocampal-entorhinal cortex (HEC) slices from mice exhibiting spontaneous sharp-wave ripple activity. Slices are incubated in a simplified interface holding chamber and recordings are performed under submerged conditions with fast-flowing artificial cerebrospinal fluid to promote tissue oxygenation and the spontaneous emergence of network-level activity.
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.
03:52
An Assay to Detect Autoantibodies in Human Serum using a Hippocampal Neuronal Culture
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2025
This video demonstrates a technique for identifying antibodies against specific antigens in a sample using a rat hippocampal neuronal culture. By exposing cultured neurons to patient samples containing autoantibodies targeting N-Methyl-D-aspartate receptors (NMDARs), the presence of autoantibodies bound to the neuronal surface is revealed through immunostaining.
FAQs
Signals from the entorhinal cortex enter the hippocampal formation and pass sequentially through the dentate gyrus, CA3, and CA1. This ordered pathway provides a framework for examining how cortical information is transformed as it moves through interconnected regions. Its defined sequence helps researchers relate circuit organization to learning, memory, and spatial representation.
Recurrent excitation gives CA3 neurons interconnected activity that can support the encoding and retrieval of patterns. This feature is important because the same network architecture can participate in forming representations and later reactivating them. Studying CA3 therefore helps explain how hippocampal circuits connect stored activity patterns with memory retrieval.
Long-term potentiation, or activity-dependent strengthening of synaptic connections, provides a cellular mechanism for investigating how experience can produce lasting changes in circuit activity. Within hippocampal networks, it links patterns of neural activation to altered synaptic communication. Researchers use this relationship to examine how circuit plasticity may support learning and memory.
Place cells provide a way to study how hippocampal activity represents locations. Their activity patterns can be examined in relation to the network pathways and plasticity mechanisms that organize spatial information. This makes them especially useful for connecting circuit-level processes with the formation, storage, and retrieval of experience-dependent spatial representations.
Network-level analysis can connect the flow of information through the dentate gyrus, CA3, and CA1 with the processes underlying learning and memory. It also allows investigators to consider how recurrent excitation and synaptic plasticity contribute to encoding and retrieval. These observations provide a circuit framework rather than focusing only on individual neural components.
Because these circuits organize information involved in learning and memory, their dysfunction offers a framework for investigating memory loss. Researchers can examine whether altered pathway organization, recurrent excitation, or activity-dependent plasticity changes how patterns are encoded or retrieved. This circuit perspective helps relate cellular and network abnormalities to impaired memory function.
Hippocampal circuit organization provides a model for studying disorders associated with network dysfunction, including epilepsy and Alzheimer’s disease. Investigators can use the established relationships among entorhinal input, dentate gyrus, CA3, and CA1 to ask how disease-related disruption affects information processing. The same framework connects pathological changes with learning, memory, and spatial representation.