The hippocampus: an overview - Deepstash
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The hippocampus: an overview

The hippocampus: an overview

  • The hippocampus is the part of the brain that is involved in forming, organizing, and storing memories. It is a limbic system structure that is particularly important in forming new memories and connecting emotions and senses, such as smell and sound, to memories.
  • The hippocampus is a horseshoe shaped structure, with an arching band of nerve fibers (fornix) connecting the hippocampal structures in the left and right brain hemispheres.
  • The hippocampus is found in the brain's temporal lobes and acts as a memory indexer by sending memories out to the appropriate part of the cerebral hemisphere for long-term storage and retrieving them when necessary.

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Divisions of the brain

  • Forebrain - encompasses the cerebral cortex and brain lobes.
  • Midbrain - connects the forebrain to the hindbrain.
  • Hindbrain - regulates autonomic functions and coordinates movement.

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Functions of the hippocampus

The hippocampus is involved in several functions of the body including:

  • Consolidation of New Memories
  • Emotional Responses
  • Navigation
  • Spatial Orientation.

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Anatomy of the hippocampus

The hippocampus is the main structure of the hippocampal formation, which is composed of two gyri (brain folds) and the subiculum. The two gyri, the dentate gyrus and Ammon's horn (cornu ammonis), form interlocking connections with one another. The dentate gyrus is folded and nes...

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Passionate tv nerd and lifelong web junkie. I love sleeping. Sleeping is a science and I study it.

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The hippocampus does not hold all the memories

Initially, your memories stay in the hippocampus and the areas connected to the neocortex, the outer part of the cerebral cortex.

As memories age, different brain areas start to manage your memories. The frontal, temporal and parietal lobes are in charge of the oldest memories.

Where your brain keeps memories

By studying people with amnesia, it seems that short-term and long-term memories don't form in precisely the same way, nor do declarative and procedural memories.

  • Emotional responses such as fear occur in a brain region called the amygdala.
  • Memories of learned skills are as...

The phobia center of the brain

The phobia center of the brain

There is no one place responsible for phobias in the brain. Many parts of the brain take part.ย 

However, fear is important to the brain's emotional processing and learning center: known as the amygdala and the hippocampus, with a central role in the process of forming memories...

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