Epithalamus

The most dorsal part of the diencephalon, containing the pineal gland and habenular nuclei, involved in circadian rhythms, emotional responses, and olfactory reflexes.

Key Functions:

• Contains the pineal gland, which secretes melatonin (regulates sleep-wake cycles).
• Houses the habenular nuclei, involved in reward processing and aversion.
• Connects the limbic system to other parts of the brain.

Interacting Systems & Components:

• Diencephalon (part of)
• Pineal Gland (component of)
• Habenular Nuclei (component of)
• Limbic System (interacts with)
• Circadian Rhythm (involved in)