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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.
LTP in the hippocampus is an important model for neural plasticity that contributes to learning and memory. [7] Schaffer collaterals are the axons of the neurons in the CA3 regions of the hippocampus that form synapses in the CA1 regions. The hippocampus is a part of the feedback process that sends signals to stop cortisol production.
The hippocampus is sometimes called the hippocampus proper and just includes the CA subfields (cornu Ammonis 1-4). The hippocampus, dentate gyrus, and other subfields make up the hippocampal formation. The dentate gyrus contains the fascia dentata and the hilus. The CA is differentiated into subfields CA1, CA2, CA3, and CA4. CA4 is often not ...
CA3 then fires to CA1 via Schaffer collaterals which synapse in the subiculum and are carried out through the fornix of the brain. Collectively the dentate gyrus, CA1, and CA3 of the hippocampus compose the trisynaptic loop. EC → DG via the perforant path (synapse 1), DG → CA3 via mossy fibres (synapse 2), CA3 → CA1 via schaffer ...
The stratum lucidum is located within the CA3 region of the hippocampus distally to the dentate gyrus and proximally to the CA2 region. It is composed of a densely packed bundle of mossy fibers (unmyelinated) and spiny and aspiny interneurons that lie immediately above the CA3 pyramidal cell layer in the hippocampus, and immediately below the ...
The anterior part of the right hippocampus was larger and the posterior part was smaller, compared with sighted individuals. [91] There are several navigational cells in the brain that are either in the hippocampus itself or are strongly connected to it, such as the speed cells present in the medial entorhinal cortex. Together these cells form ...
The hippocampus contains pyramidal neurons in three areas: CA1, CA2, and CA3. [2] The pyramidal neurons of each area have different properties. However, in all areas, dendritic synthesis of proteins is necessary for late long-term potentials in the hippocampal neurons. [7] Neurons throughout the limbic system are known to have "burst" properties.
The dentate gyrus (DG) is one of the subfields of the hippocampus, in the hippocampal formation. The hippocampal formation is located in the temporal lobe of the brain, and includes the hippocampus (including CA1 to CA4) subfields, and other subfields including the dentate gyrus, subiculum, and presubiculum. [1] [2]