Limbic system

Definition

The limbic system is a complex set of structures in the brain that deals with emotions, memories, and arousal (or stimulation). It includes the hippocampus, amygdala, thalamus, and parts of the hypothalamus.

5 Must Know Facts For Your Next Test

1. The limbic system plays a key role in regulating emotions such as fear and pleasure.
2. The hippocampus within the limbic system is crucial for forming new memories.
3. Damage to the amygdala can affect emotional responses and behavior.
4. The thalamus acts as a relay station for sensory information going to the cortex.
5. Parts of the hypothalamus in the limbic system are involved in hormone release and regulation of autonomic functions.

Review Questions

• What are two primary functions of the limbic system?
• Which structure within the limbic system is essential for memory formation?
• How does damage to the amygdala affect an individual?

Related terms

hippocampus:

A part of the brain's limbic system responsible for memory formation.

amygdala:

An almond-shaped structure involved in emotion regulation and response.

thalamus:

A relay station in the brain that processes and transmits sensory information to the cerebral cortex.