You have to be careful though. Some things have been classified incorrectly years ago, so people may confuse the condition.

Example: Little's Disease.

This is not a disease as at. It is a condition. It is now known as Spastic diplegia. It a a specialized form of cerebral palsy. Cerebral palsy is none of the three things you mention, yet at one time was treated as such.

Yes that's why the definition needs to be updated and modernised, to reflect today's world and knowledge and medical advances. I don't think many people suffering from a disease by dictionary definition, would take kindly to being referred to as "diseased" just because they had movement inability.

@John

Strokes are usually caused by an underlying medical condition, (e.g. heart disease).

What about the millions of people who have movement disorders caused by strokes of varying severity every year. Are these diseased people, people we want to avoid like the plague!? or are they ordinary unfortunate people with a condition. They may have a DIS-ease has defined in dictionaries, but they are not infected with something that people in the street need ran away from in panic.

Dis-ease

NOUN

Having the word disease in a iscussion about the subtle difference between sick and ill confuses the issue.

Are people who suffer strokes "diseased people" or "stricken people" ?

No. Cerebral Palsy is not a disease - it is actually a term used to describe a range of conditions that typically cause physical impairment.

The above comes from the cerebralpalsy.org website.

Cerebral Palsy is caused by brain damage before birth, during birth, or after birth while the brain is still under development. It is unique to the individual; it need not affect movement. It depends on the area of the brain affected and to what degree.

If you want to consider it a disease, do so. However, by classifying it, along with potential other conditions, as a disease does a disservice to those affected by it.

Since you want to say movement disorders are diseases, does drunkenness classify as a disease? Since I walk better than people in a drunken stupor, they must be the one with the disease.

By the way, I have Cerebral Palsy.I know other people with Cerebral Palsy. All of us were affected differently.I have a mixed form of Cerebral Palsy - Spastic and Ataxic. I have never thought of my "disability" as a disease.