TENS can be used to relax spastic limbs in multiple sclerosis. The electrodes are placed over the femoral or sciatic nerves. For some unexplained reason it does not seem to work in spasticity from other causes.
Prof. Kaada, a Finnish neurologist, has described the use of TENS to increase the peripheral circulation to treat ulcers and other disorders. He places the electrodes across the hand and stimulates the muscles at 2 Hz to produce a clonic contraction. This is said to cause the release of VIP and other humoral vasodilators; patients use the method twice a day for about half an hour. I have seen brilliant results with this technique in severe Raynaud’s disease but it is by no means a panacea.