Find Information About:

Drugs & Supplements

Get information and reviews on prescription drugs, over-the-counter medications, vitamins, and supplements. Search by name or medical condition.

Pill Identifier

Pill Identifier

Having trouble identifying your pills?

Enter the shape, color, or imprint of your prescription or OTC drug. Our pill identification tool will display pictures that you can compare to your pill.

Get Started
My Medicine

My Medicine

Save your medicine, check interactions, sign up for FDA alerts, create family profiles and more.

Get Started

WebMD Health Experts and Community

Talk to health experts and other people like you in WebMD's Communities. It's a safe forum where you can create or participate in support groups and discussions about health topics that interest you.

  • Second Opinion

    Second Opinion

    Read expert perspectives on popular health topics.

  • Community


    Connect with people like you, and get expert guidance on living a healthy life.

Got a health question? Get answers provided by leading organizations, doctors, and experts.

Get Answers

Sign up to receive WebMD's award-winning content delivered to your inbox.

Sign Up

Parkinson's Disease Health Center

Font Size

Glossary of Parkinson's Disease Terms


Festination: Walking in rapid, short, shuffling steps.

Flexion: A bent or curved posture.

Glaucoma: A sustained increase of pressure within the eyeball, which can injure the optic nerve and cause impaired vision or blindness. Although rare, treatment with anticholinergic drugs (see anticholinergic) may exacerbate glaucoma.

Globus pallidus: A structure located deep in the brain in the inner part of the basal ganglia.

Hypokinesia: Decreased motor activity.

Idiopathic: An adjective meaning "of unknown cause." The usual form of Parkinson's is idiopathic Parkinson's.

Intention tremor: Tremor occurring when the person attempts voluntary movement.

Lenticular nucleus: A group of nerve cells located in the basal ganglia, a structure deep within the brain. The lenticular nucleus contains the cells of the putamen and globus pallidus.

Levodopa: A drug, containing a form of the important brain chemical dopamine, commonly used to treat symptoms of Parkinson's disease. Sinemet and Prolopa contain levodopa.

Levodopa-induced dyskinesias: A side effect of taking levodopa that may occur with prolonged use and is marked by abnormal, involuntary movements. Reducing the amount of levodopa may alleviate the side effect.

Lewy body: Brain cells that have abnormal pigmented spheres inside them. They are found in the damaged parts of the brain in people with Parkinson's disease.

Livido reticularis: A purplish or bluish coloration of the skin seen usually below the knee and on the forearm in persons treated with Symmetrel. This is usually a benign condition.

Lodosyn (Carbidopa): A drug that is usually given in combination with a Parkinson's drug called levodopa; the combination is called Sinemet. Carbidopa helps levodopa to be more effective and can be used to reduce the side effects of levodopa.

Mirapex (pramipexole): A newer dopamine agonist that is tolerated better and is more effective.

Micrographia: The tendency to have very small handwriting due to difficulty with fine motor movements in Parkinson's disease.

MPTP: A toxic chemical, exposure to which causes Parkinson's disease symptoms in some intravenous drug users. It is now used to produce Parkinson's symptoms in laboratory animals in order to study the disease.

Myoclonus: Jerking, involuntary movement of arms and legs, usually occurring during sleep.

1 | 2 | 3 | 4 | 5 | 6 | 7

Today on WebMD

Parkinsons disease illustration
Causes, symptoms, and treatments.
hands on walker
How does the disease progress?
man with serious expression
8 common questions and answers.
intelligence quotient illustration
What are the advantages of DBS?
Parkinsons Disease Medications
Questions Doctor Parkinsons
Eating Right
Parkinsons Exercise
daughter consoling depressed mother
senior man's hands
Parkinsons Daily

WebMD Special Sections