Start your free trial today and get unlimited access to America's largest dictionary, with: 1  More than 250,000 words that aren't in our free dictionary. 2  Expanded definitions, etymologies, and usage notes. 3  Advanced search features. 4  Ad free!
This small nucleus contains almost half of all the brain neurons that use norepinephrine as a neurotransmitter. The locus coeruleus also projects its axons to those parts of the brain that may be associated with panic disorders (the amygdala, hippocampus, septum, cortex, brainstem, reticular formation, etc). Stimulating an animal's locus coeruleus, like stimulating its amygdala, produces anxiety behaviours.
Not every symptom of anxiety is caused by the endocrine system, but many of them are. Stress and anxiety affect nearly every gland in your body. Your endocrine system plays a crucial role in this, releasing many of the hormones that create your anxiety symptoms. It Starts With Your Adrenal Gland When you have anxiety, your brain sends messengers to your adrenal gland to release epinephrine (adrenaline) into your body.