Ca1 Ca3 Dentate Regions
Ca1 Ca3 Dentate Regions - Related Videos
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.
10:55
Assessment of Dendritic Arborization in the Dentate Gyrus of the Hippocampal Region in Mice
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Cited by 6 •
2015
We describe two methods for visualization and quantification of dendritic arborization in the hippocampus of mouse models: real-time and extended depth of field imaging. While the former method allows sophisticated topographical tracing and quantification of the extent of branching, the latter allows speedy visualization of the dendritic tree.
09:29
Stereotactic Atlas-Guided Laser Capture Microdissection of Brain Regions Affected by Traumatic Injury
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Cited by 3 •
2017
We describe the use of laser capture microdissection to obtain samples of distinct cell populations from different brain regions for gene and microRNA analysis. This technique allows the study of differential effects of traumatic brain injury in specific regions of the rat brain.
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.
03:04
High-Frequency Stimulation to Enhance Neuronal Activation and Neurogenesis in the Mouse Dentate Gyrus
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2025
Source: Zhao, Z. et al. An Invasive Method for the Activation of the Mouse Dentate Gyrus by High-frequency Stimulation. J. Vis. Exp. (2018)This video demonstrates the protocol for delivering high-frequency deep brain stimulation to a mouse hippocampal dentate gyrus, detailing its effects on neuronal activation, synaptic plasticity, and neurogenesis.
FAQs
The dentate gyrus helps distinguish between similar experiences by receiving entorhinal cortex input through granule cells before information reaches CA3. This early transformation is important because overlapping input patterns can be organized into more distinct activity patterns. Examining this stage allows researchers to study how hippocampal circuits support precise spatial representation and discrimination among related memories.
CA3 receives dentate granule cell output through mossy fibers and sends signals onward to CA1 through Schaffer collateral pathways. Its position links the initial organization of incoming information with downstream integration, making it especially relevant to associative memory. Studying CA3 helps clarify how separate elements of an experience become represented within a coordinated hippocampal sequence.
CA1 serves as an integration and relay stage after information has passed from the dentate gyrus through CA3. CA1 pyramidal neurons receive Schaffer collateral input and combine activity within the broader hippocampal circuit before transmitting it onward. This arrangement makes CA1 useful for examining how processed signals contribute to memory-related representations and experience-dependent plasticity.
Their contributions differ according to circuit position and connectivity. The dentate gyrus organizes incoming entorhinal signals, CA3 receives this transformed activity and supports associative memory, and CA1 integrates information from CA3 before relaying it onward. Comparing these regions helps separate pattern separation, associative processing, and downstream representation as related but distinct operations.
A canonical flow begins when signals from the entorhinal cortex enter the dentate gyrus. Granule cells then project through mossy fibers to CA3, whose pyramidal neurons communicate with CA1 through Schaffer collateral pathways. Following this sequence helps researchers interpret where activity is transformed, associated, integrated, and relayed during studies of hippocampal function.
The regions form an interconnected circuit, so examining them together reveals how distinct cellular properties and pathways contribute to a shared computation. Joint study can connect input organization in the dentate gyrus with associative processing in CA3 and integration in CA1. This circuit-level perspective supports research on learning, memory, spatial representation, plasticity, and neurological disease.