Back pain is one of the most common causes of sick days in the UK. Your back will soon let you know when it has been strained or damaged by means of localised or sharp pain, tensed or strained muscles.

Brain damage is an injury that causes the destruction or deterioration of brain cells. Many people a year suffer a brain injury, whether as a result of trauma, stroke, tumour, or other illnesses.

Hereditary spastic paraplegia (HSP) refers to a group of inherited disorders that cause weakness and stiffness of the leg muscles, which gradually gets worse over time.

Multiple sclerosis (MS) affects nerves in the brain and spinal cord, causing a wide range of symptoms including problems with muscle movement, balance and vision