Why Does TENS Provide Analgesia?
No one can say exactly why TENS works. There are two prevailing theories that attempt to explain why and how TENS creates pain relief: 1. The Gate Theory: TENS activates touch reception nerves that cause the closure of pathways to the brain for pain-relaying nerves. With the gate open for touch nerves, the gate stays closed for pain nerves, meaning signals of pain do not reach the brain. 2. The Neurochemical Release Theory: TENS causes the release of endorphins in the brain. These endorphins are the bodys natural pain relievers. An endorphin release is associated with an accompanying reduction in pain sensations. Both of these explanations remain only theories. No one can say with certainty why TENS relieves pain. Which Conditions Is TENS Appropriate For? TENS is used to provide analgesia for people with a wide range of conditions, both acute and chronic, including the following: Fibromyalgia Osteoarthritis Back pain Recovery from surgery Labor pain Migraines Tendonitis Bursitis Dental
