By JULIAN SHEA in London | China Daily Global | Updated: 2021-03-15 04:55 Share CLOSE A new study led by the University of Portsmouth in England has identified a significant feature in the deterioration of the 'insulation' of the wiring of the human brain, which could play a major role in the prevalence of neurodegenerative conditions such as Multiple Sclerosis (MS) and Alzheimer's, which is a major medical challenge facing the ageing society of China and other countries. The substance in question is called myelin and acts as a protective casing for neurological electrical connections called axions, enabling the high-speed sending of messages between nerve cells.