What causes tremors in the Parkinson’s disease?

There are several health conditions and diseases that prevail arbitrarily but are often unseen or are unnoticed due to the lack of awareness or the right knowledge about some of these conditions leading to the failure of detecting such cases.

Parkinson’s disease is one such disease that may be rampant yet lacks full awareness regarding the same. It is a progressive nervous system ailment that generally affects a person’s movement. Symptoms vary from one person to another and often begin at the limbs. One of the most commonly noticed symptoms in a person diagnosed with Parkinson’s Disease is tremors. The tremors are further followed by stiffness or slowing of physical movement.

One of the most noticeable forms of tremors of Parkinson’s is the ‘resting tremors’. The cause of these tremors is often associated with the complex interactions between multiple factors. An observable anomaly in the cognitive activity that includes substantia nigra, thalamus and the basal ganglia results in the consecutive changes in the level of the neurotransmitters named dopamine alongside its actions. Since they are known to be correlated and work in tandem with one another, any alteration in these processes causes a high possibility of tremors. These tremors are predominantly occurring or affect the arms, jaws, legs or the feet and they are significantly prominent on one side than the other.

These are some characteristics of the Parkinson’s Disease’s tremors that you might need to be aware of:

  • Tremors of Parkinson’s Disease typically occur when at rest and stop with voluntary action and they recur until you hold the new position that you may have decided to settle with.
  • The tremors are known to affect one’s hand in the earlier stages before it affects any other part of the body and visually appears as if you are rolling a tiny object between your index finger and the thumb. This motion is the reason why it’s called the pin-rolling tremor.
  • Shaking tremors are yet another type of tremors that people with Parkinson’s Disease are affected with which often results in hands and fingers trembling or shaking involuntarily.

The most common query regarding this disease is “What causes the tremors?”

Researchers claim that one of the pivotal causes of Parkinson’s disease is due to the decrease in the level of dopamine, an eminent neurotransmitter that aids motor movements of the body. When someone is affected by PD, the substantia nigra, a dedicated region of the brain stem for production of dopamine get affected and ceases to function. The drop in dopamine levels is observed to have commenced years before the onset of the disease in an individual. This subsequently affects different aspects of movements such as:

  • Voluntary Movements
    Activities such as holding a pen or a cup fall under voluntary movements and it generally is known to receives and responds to dopamine, and, when there is a drop in the level of dopamine, it doesn’t allow one you to function as it should.
  • Complex Movements
    The thalamus and the subthalamic nucleus is responsible for allowing you to perform slightly complex tasks such as stirring sugar with a spoon, zipping a big, etc. When the levels of dopamine reach a critically low level, the thalamus loses its normal regulatory input disabling you to perform these tasks with seamlessness.
  • Coordinated Movements
    The cerebellum is known to aid in coordination, while the motor portion of your cerebral cortex regulates voluntary movements of your body. Both these parts receive signals about your body’s position from the thalamus and perform these coordinated physical movements. Lack of the signal reaching your brain leads to tremors while performing complex tasks.

It may appear that dopamine is the only reason why one might suffer from tremors of the Parkinson’s Disease but it may not be the case entirely. Science is trying to find more accurate reasons and causes for which these tremors may occur. However, there are several treatments available for this disease which include medications that increase and improve the action of dopamine, along with some surgical interventions. In case, you have PD, you must know that there is a lot of research and progress that’s being made in identifying the causes and generating new treatment options to help manage the symptoms of your condition.

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