Medical Marijuana - Multiple Sclerosis (Rhonda O'Donnell)
Channel: Luke
Date: 2013-04-16

Multiple Sclerosis is an inflammatory disease in which the fatty myelin sheaths around the axons of the brain and spinal cord are damaged, leading to demyelination and scarring as well as a broad spectrum of signs and symptoms... 
MS affects the ability of nerve cells in the brain and spinal cord to communicate with each other effectively. Nerve cells communicate by sending electrical signals called 'action potentials' down long fibers called 'axons', which are contained within an insulating substance called 'myelin'. In MS, the body's own immune system attacks and damages the myelin. When myelin is lost, the axons can no longer effectively conduct signals. There is no known cure for MS. - Wikipedia

The "burning pain" as described in the interview is caused by an overload of signals sent from the brain to the legs, causing the muscles to tense significantly. Cannabis counters this by reducing the level of signals being sent, thus relaxing the muscle, relieving pain and making them more agile for use.

This clip has been taken from the documentary 'In Pot We Trust' which displays a range of medical, social and political views and the medical purposes of marijuana in relation to Cerebral Palsy, Glaucoma, Multiple Exostoses and Post-Traumatic Stress Disorder: http://www.youtube.com/watch?v=7qTsS6nAqjA