Massage tilts the brain’s balance away from stress and towards relaxation and healing
In a previous post, I described the benefit of massage at the scene of the crime, so to speak, the site of the muscle injury. The mechanical deformation of tissue during massage causes reduction in local inflammation, increases the biogenesis of mitochondria, and accelerates the remodeling of the injured tissue.
But could that account for the emotional experience of massage? How could all these local effects cause the sense of relaxation and general well-being? In short, they don’t.
It’s all in your head
Serotonin is a neurotransmitter that is secreted in the brain by specialized neurons (serotoninergic neurons). It regulates mood, hunger, and sleep and it promotes a sense of well-being and contentment.
Massage promotes the release of serotonin, which explains the positive mood effect, and the observation that despite vigorous manipulation people can fall asleep during a massage session.
There is another important effect of this substance. Blood platelets contain high concentrations of serotonin. When a tissue suffers any kind of trauma, such as small muscle tears caused by exercise, platelets accumulate at the injury site and release their serotonin.
This has several effects. It constricts the local small blood vessels—minimizing blood loss. It also attracts the cells that are involved in the healing process, accelerating the repair of the wounded tissue. (This is one reason why people with a low platelet count heal their wounds poorly.)
Dopamine is another neurotransmitter whose concentration is elevated by massage. The neurons that use dopamine as their chemical transmitter (dopaminergic neurons) make up the reward system in the brain. So massage induces the same sense of pleasure as sex, or a glass of wine, or on the darker side, a recreational drug such as heroin. No wonder some people are “addicted” to massage.
Oxytocin is the “love hormone”, and it is elevated in nursing mothers and people who fall in love. In general, it promotes the warm and fuzzy feeling. Alas, this effect is limited and fades with time, which may explain why most love affairs eventually cool off. Now, here is an intriguing observation. This hormone is released when massage is not vigorous, but rather gentle; the type you get in a spa, getting pampered.
Link original: http://thedoctorweighsin.com/massage-and-your-brain/