A note for Lesson no. 5, "Your Brain Secretly Works With Other Brains," in Lisa Feldman Barrett.
Some context from page 85 is:
If your loved one is in pain, you can lessen her suffering merely by holding her hand.
See these references.
- Coan, James A., Hillary S. Schaefer, and Richard J. Davidson. 2006. "Lending a Hand: Social Regulation of the Neural Response to Threat." Psychological Science 17 (12): 1032–1039.