What is the Septo hippocampal system?
Septo-hippocampal pathways penetrate the hippocampus by way of the fornix. Through this GABAergic to GABAergic connections, septal projections can disinhibit hippocampus and increase the excitability of large numbers of pyramidal neurons (Lee et al., 1994).
What does the limbic system’s hippocampus do?
Hippocampus is a brain structure embedded deep in the temporal lobe of each cerebral cortex. It is an important part of the limbic system, a cortical region that regulates motivation, emotion, learning, and memory.
What is the left hippocampus responsible for?
The hippocampus is thought to be principally involved in storing long-term memories and in making those memories resistant to forgetting, though this is a matter of debate. It is also thought to play an important role in spatial processing and navigation.
What is limbic system?
The limbic system is a set of structures in the brain that deal with emotions and memory. The limbic system is composed of four main parts: the hypothalamus, the amygdala, the thalamus, and the hippocampus.
What is the lateral septum?
The lateral septum is a relay center for connections from the CA3 of the hippocampus to the ventral tegmental area. These connections help link reward signals with the context in which they occur.
What happens when the hippocampus shrinks?
Hippocampus Shrinkage and Depression Hippocampal shrinkage also damages cognitive functions and interferes with the process of creating memories, which has a profound impact on both behavior and the ability to form a stable, realistic, and cohesive sense of self.
What causes hippocampus damage?
Damage to hippocampus can occur through many causes including head trauma, ischemia, stroke, status epilepticus and Alzheimer’s disease.
How is the hippocampus affected by Alzheimer?
The hippocampus is essential for forming new memories, such as what one ate for lunch or a recent conversation. The progressive shrinkage of the hippocampus is responsible for the short-term memory loss that is the hallmark symptom of Alzheimer’s.
What happens if the limbic system is damaged?
Damage to the limbic system can cause the hormonal system to become unbalanced. The ability to perceive hunger or a feeling of satiety is reduced and emotional reactions can change.