“little brain in the gut” or the enteric nervous system, also known as the emotional brain. It was discovered in the late nineteenth century, and it is endowed with both sensory and motor neurons; this region contains half the body’s neurons and has a full range of neurotransmitters, hormones, and opiate receptor sites. According to Dr. Jill Ammon-Wexler, a pioneering brain researcher, “Your ‘gut-brain’ is also able to learn, remember, and produce emotion-based feelings.”