The vagus nerve releases which neurotransmitter?

The vagus nerve primarily releases acetylcholine as its neurotransmitter. This is significant because acetylcholine plays a vital role in the autonomic nervous system, particularly in the parasympathetic division, which is responsible for promoting a state of rest and digest. The vagus nerve influences various bodily functions, including heart rate reduction, digestive processes, and respiratory rate, through the action of acetylcholine on various receptor sites throughout the body.

Understanding the role of the vagus nerve and acetylcholine is crucial for comprehending how biofeedback and relaxation techniques can impact physiological processes. Acetylcholine's release helps support a calming response, counteracting the stress response and contributing to overall homeostasis in the body.