Hippocampus Ca1
Hippocampus Ca1 - Related Videos
02:39
In Vitro Recording of Theta Oscillations in the Mouse Hippocampus
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2025
This video demonstrates the recording of rhythmic neuronal network activity, also known as theta oscillations, in an isolated hippocampus. Electrodes are inserted into various layers and spatial positions to detect and analyze theta oscillations. This shows the unique neuronal compositions and the connectivity of the neuronal network across different layers of the hippocampus.
09:06
Stereotactic Injection of MicroRNA-expressing Lentiviruses to the Mouse Hippocampus CA1 Region and Assessment of the Behavioral Outcome
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Cited by 23 •
2013
MicroRNAs have significant roles in brain structure and function. Here we describe a method to enforce hippocampal miRNA over-expression using stereotactic injection of an engineered miRNA-expressing lentivirus. This approach can serve as a relatively rapid way to assess the in vivo effects of over-expressed miRNAs in specific brain regions.
14:27
Investigating Long-term Synaptic Plasticity in Interlamellar Hippocampus CA1 by Electrophysiological Field Recording
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Cited by 11 •
2019
We used recording and stimulation electrodes in longitudinal hippocampal brain slices and longitudinally positioned recording and stimulation electrodes in the dorsal hippocampus in vivo to evoke extracellular postsynaptic potentials and demonstrate long-term synaptic plasticity along the longitudinal interlamellar CA1.
03:10
Recording CA3-CA1 Synaptic Responses in a Rat Hippocampal Slice
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2025
This video demonstrates a method to record CA3-CA1 synaptic responses in a rat hippocampal slice. It outlines the steps involved in placing the stimulating and recording electrodes on the hippocampal slice and measuring the field excitatory postsynaptic potential (fEPSP) to assess synaptic response strength.
02:42
In Vivo Two-Photon Imaging of Microglial Dynamics in the Mouse Hippocampus
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2025
Source: Kamei, R., et. al., In Vivo Chronic Two-Photon Imaging of Microglia in the Mouse Hippocampus. J. Vis. Exp. (2022)The video demonstrates the setup and imaging process for in vivo two-photon microscopy of microglial dynamics in the hippocampal CA1 (Cornu ammonis 1) and dentate gyrus, ensuring optimal optical alignment and structural integrity assessment.
FAQs
CA1 pyramidal neurons receive excitatory signals from two principal sources: CA3 via Schaffer collateral fibers and entorhinal cortex. These inputs give CA1 access to different stages of hippocampal-cortical information flow, allowing it to integrate signals rather than simply relay one pathway. Studying their combined effects helps explain how local activity contributes to spatial, contextual, and mnemonic processing.
NMDA receptor activation can strengthen synapses through long-term potentiation, a lasting increase in synaptic efficacy. In CA1, this mechanism provides a cellular basis for examining how patterns of incoming activity become persistent changes in circuit function. Experiments focused on long-term potentiation therefore connect synaptic physiology with broader questions about memory formation and consolidation.
CA1 activity cannot be interpreted solely as a readout of CA3 or entorhinal input. Local circuit processing modifies how those incoming signals are combined, so recorded activity reflects both external drive and transformations within the subregion. This distinction matters when researchers relate neuronal responses to place-cell coding, contextual learning, or memory, because the observed signal includes integration at CA1 itself.
CA1 recordings can reveal place-cell coding, in which neural activity is examined in relation to spatial navigation. Because CA1 integrates CA3 and entorhinal signals, its activity offers a way to study how spatially relevant information is represented after converging inputs and local processing. This makes the subregion useful for connecting circuit activity with navigation-related memory.
Recordings and imaging provide measurements of CA1 activity that can be linked to synaptic plasticity, spatial navigation, contextual learning, and memory formation. Used together with the known circuit organization, these approaches help researchers move between levels of analysis, from cellular or population signals to circuit operations and cognitive functions. Their value lies in making those connections experimentally accessible.
A focused CA1 study isolates a subregion where converging excitatory inputs, NMDA-dependent strengthening, and local processing can be considered together. This narrower target helps researchers ask whether particular activity patterns relate to place-cell coding, memory consolidation, or contextual learning. It also permits examination of CA1 vulnerability in conditions such as ischemia and epilepsy.
CA1 is used as a site for studying vulnerability to ischemia and epilepsy because its activity and synaptic function can be examined within a defined hippocampal circuit. Recordings and imaging can connect condition-related changes to altered signal integration, synaptic plasticity, and the cognitive functions normally associated with CA1. This links disease-related circuit disruption with cellular and behavioral questions.