What Are The Four Cardinal Signs Of Parkinson’s Disease?

Parkinson’s is a very frightening disease to be diagnosed with. It develops when there is a significant deterioration in the brain cells (neurons). There are certain cells in the brain which produce a chemical known as dopamine. When these cells are damaged, and they stop producing this chemical, the brain can’t send signals correctly throughout the body, which causes loss of muscle function.

You now have brief knowledge on what Parkinson’s is and what causes it; I’m sure you’re now asking how you can detect the development of this disease. Let’s look at the four cardinal signs of Parkinson’s disease.

Resting Tremors

In the early development stages of Parkinson’s, many patients face this problem. The tremors can be in any part of the body, but mostly in the moving parts such as arms and legs. Other parts such as jaws can also be affected. They’re called resting tremors because they happen when someone is relaxed.


Other diseases may have tremors as one of their symptoms, but the movements associated with Parkinson’s disappear when the person moves voluntarily. This is a factor that points this disease as the underlying cause.


Another cardinal sign of Parkinson’s is the rigidity of body parts. Many victims don’t realize that they have rigidity until someone else like a physiotherapist or doctor points it out to them.

It happens when body cells have become weak, and the growth process is slowed down due to inactivity and less body movement. As time goes by, the body muscles acquire a state of less frequent movement.

As a result of this rigidity, a person may feel pain in the affected parts. With time passage, the rigidity spreads to other body parts and he/she may feel paralyzed because they can’t easily move these parts. Muscles don’t build new fibers cell generation has been slowed down.


Bones in our bodies act as supporting structures and they assist in the movement process of any body part as passive elements. Active elements are muscles because they have stored energy in their fibers and tissues. The growth and health of muscles depend on cell health and how well they can regenerate. When new cells are produced, muscles become nourished and stronger. However, due to the inactivity of body parts, cell generation is slowed down and the needed energy is not provided. Therefore, a victim can move their body parts and they feel pain in movement. This is what is known as Bradykinesia.


It can also be expressed as soft speech, decreased blink rate, small handwriting, and reduced facial expressions. If you have noticed these signs and you’ve determined that they have this disease, you can enroll your loved one in a Parkinson’s care center for quality attention.

Postural instability

This refers to imbalance and poor righting reflexes. The uncontrollable tremors and muscle tightness can significantly affect a person’s balance. They may stumble over nothing and they have to grab something to stabilize themselves.

This sign may not be noticeable in the early stages especially in young people. But with continued development of this disease, they fall frequently and experience body fractures and other injuries.

These are the four cardinal signs of Parkinson’s disease as genetic disorder. If you or your loved one is experiencing these signs, it’s vital that you consult a doctor right away. Early diagnosis can help better manage this condition.