What physiological phenomenon has research demonstrated can be alleviated by positive affect?

Question

Quizplus · Accepted Answer

Research has shown that positive affect can alleviate both chronic and acute pain. A study found that positive emotions can increase pain tolerance, decrease pain perception, and reduce the activation of brain regions involved in pain processing. Positive affect has also been found to reduce the need for pain medication after surgery.

What Physiological Phenomenon Has Research Demonstrated Can Be Alleviated by Positive