Explaining the Role of the Hippocampus

Explaining the Role of the Hippocampus

Hi to all have a great day. this article aims to explain the structural architecture of the hippocampus and the transmission pathway of the Tri synaptic circuit. all of which are associated with cognitive processes like memory formation to start with here’s the anatomy of the brain. this is visually and structurally divided into four lobes. the frontal temporal parietal and occipital lobe deep within the medial temporal lobe is a set of structures collectively known as the limbic system.we will solely be focusing on the hippocampus which is one of the structures that make up the limbic system. this is a paired structure with one found within each cerebral hemisphere the word hippocampus is Greek for seahorse as it takes on the shape.

Explaining the Role of the Hippocampus
Hippocampus

It’s part of the hippocampal formation comprising of the parahippocampal gyrus and two Rhino cortex the cibecue ylim and the dentate gyrus. the hippocampus has roles within spatial awareness and the conscious recollection and consolidation of declarative memory these are the types of memories. that you can declare like facts and events known as episodic memory case studies support its role in memory formation.where lesions in hippocampus have resulted in the inability of patients to form new memories however it’s important to note that there are many types of memories each supported by distinct neural systems throughout the brain for example non-declarative memory. which includes procedural and habitual learning is known to be supported by the basal ganglia. now let’s look further into the tri synaptic circuit.

Explaining the Role of the Hippocampus
Hippocampus

Which will explain the flow of information through the structures of the hippocampus the major sensory input into the hippocampal formation will come in from the enter Rhino cortex this is a bundle of fibres forming. the input tracks this will act as a hub in the widespread network for the memory these bundles of fibers in the internal cortex will project to the granule cells of the dentate gyrus via the performant pathway this is the first pathway in the Tri synaptic circuit from here the dentate gyrus will transmit its signals to the ca3 pyramidal neurons through the mossy fiber pathway. which is the second pathway of the circuit these mossy fibers have dense reciprocal connections which are able to generate new patterns of activity where one single mossy fiber can project to around 35 pyramidal cells within the ca3 CA stands for core new amoenus and helps her to divide.

Explaining the Role of the Hippocampus
Hippocampus

The hippocampus into four subfields from CA 1 to ca for this name actually comes from the similarity between the shape of the hippocampus to the ancient Egyptian deity Ammon. who has horns of a ram then the Schaefer collateral pathway which is the third pathway completing the tri synaptic circuit will connect the ca3 neurons to the ca1 Schaffer collateral neurons. where it has the highest concentration of NMDA receptors within the brain finally the ca1 neurons will project to the Subic ulam which is considered the major output region for the hippocampus it will go out to the cortical and subcortical regions the cibecue l’m not only receives call to call inputs from the n-terminal paranal and prefrontal cortices.

Explaining the Role of the Hippocampus
Hippocampus

But it sends projections out to the fornix and back out to the internal cortex in order to complete the loop the cells that make up the hippocampus will collectively act as an index. this is similar to how a computer index works as it’s able to retrieve and recall the information that is necessary for particular memories in the case of playing piano or studying the hippocampal index will retrieve and reactivate. all of the distributed parts of the different processing areas associated with that memory so essentially the stronger the connections are between these neurons the quicker you’ll be able to recall. what you wanted to remember this is essentially a cortical representation of a memory therefore the hippocampus has to communicate with many distributed regions of the cortex and to collect all of the information from these widespread.

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