Parkinson's Disease

(PD; Paralysis Agitans; Shaking Palsy)

Definition

Parkinson's disease (PD) is a progressive movement disorder. PD is characterized by:
  • Slowing down of movements (bradykinesia)
  • Tremor at rest
  • Muscle rigidity
  • Loss of reflexes that maintain posture and equilibrium
Part of the Brain Affected by PD—Yellow Section
Substansia Nigra
Copyright © Nucleus Medical Media, Inc.

Causes

PD is caused by a loss of certain nerve cells in the brain. The loss of these cells causes a decrease in the amount of a brain chemical called dopamine. Low dopamine levels cause PD symptoms.The brain cells may be lost because of genetic defects, the environment, or some combination of the two. A small amount of people with PD have an early-onset form. This type is caused by an inherited gene defect.

Risk Factors

PD is more common in men and in people aged 50 years and older. Other factors that increase your chance of PD include:

leave comments
0
Did you like this? Share with your family and friends.
Related Topics:
Current Research From Top Journals


Early Peanut Consumption Associated with Lower Risk of Peanut Allergy in High Risk Children
March 2015

Many medical groups felt that early exposure to certain foods like peanuts increased a child's risk of developing food allergies. However, newer research including this trial suggest that early exposure may actually decrease the risk of developing food allergies.

dot separator
previous editions

Breastfeeding May Decrease the Risk of Childhood Obesity
February 2015

Tonsillectomy May Reduce Number of Sore Throat Days in Children
February 2015

Research Review Finds Little Support for Nearly Half of Medical Talk Show Recommendations
January 2015

dashed separator

Advertisement

Our Free Newsletter
click here to see all of our uplifting newsletters »

 

Advertisement

Advertisement

DiggDeliciousNewsvineRedditStumbleTechnoratiFacebook