autonomic

It's part of the autonomic nervous system, which controls things we don't think about, like breathing, heart rate and digestion.

When you see green trees, smell pine and hear gentle rustling leaves or the sound of birdsong, your autonomic nervous system - a network of nerves controlling unconscious processes - responds instantly.

The heart has long been thought to be controlled solely by the autonomic nervous system, which transmits signals from the brain.

"However, these results provide early evidence that the autonomic nervous system may be a therapeutic target for disease modification of HD."

Music can activate our autonomic nervous system and even cause shivers down the spine.