Scientists at Edinburgh University have for the first time been able to pinpoint the nerves that die leading to the progression of Multiple Sclerosis PATIENTS with an incurable condition affecting one in 500 Scots have been offered hope by a world-first trial that could pave the way for treatments to halt its progression. Scientists have been able to pinpoint the individual nerves that die leading to Multiple Sclerosis symptoms worsening, such as reduced mobility and pain. There are two types of nerves; excitatory, which simulate the body to do things, and inhibitory, which dampen down a response. It has been previously thought progression of MS was due to both suffering irreparable damage.