Locus Coeruleus (LC)

A small nucleus located in the pons of the brainstem, serving as the primary source of norepinephrine in the brain, playing a critical role in arousal, attention, stress responses, and sleep-wake cycles.

Key Functions:

• Produces and releases norepinephrine.
• Regulates arousal, attention, and vigilance.
• Involved in stress responses and fear.
• Modulates sleep-wake cycles and REM sleep.

Interacting Systems & Components:

• Pons (located in)
• Brainstem (part of)
• Norepinephrine (primary neurotransmitter produced)
• Reticular Activating System (RAS) (contributes to)
• Attention and Arousal (key for)