Glossary

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O

Obstructive sleep apnea:

A sleep disorder characterized by episodes of temporary cessation of breathing due to obstruction of the airway.

Relating to or causing movement of the eyes.

Oculomotor:

Off episodes: 

This term refers to the times when people with Parkinson’s disease have a decrease in the ability to move (hypomobility) and other symptoms that cause difficulty rising from a chair, speaking, walking, or performing their usual activities. Off episodes occur because the person’s dose of levodopa has worn off too soon or has suddenly and unexpectedly stopped providing benefit.

Off time:

 This term refers to the times when people with Parkinson’s disease have a decrease in the ability to move (hypomobility) and other symptoms that cause difficulty rising from a chair, speaking, walking, or performing their usual activities. Off episodes occur because the person’s dose of levodopa has worn off too soon or has suddenly and unexpectedly stopped providing benefit.

Olivopontocerebellar atrophy (OPCA):

A group of rare hereditary disorders characterized by neurodegenerative changes of certain brain regions, including the cerebellum and specialized groups of nerve cells (nuclei) in the brainstem (e.g., olivary and pontine nuclei). With most forms of the disorder, initial symptoms become apparent from adolescence to mid-adulthood; however, a rare form has been identified that may be evident at birth. Depending upon the type of OPCA, symptoms may include progressively impaired coordination, postural instability, slurred speech (dysarthria), and other associated findings (i.e., cerebellar ataxia); parkinsonism; rapid, involuntary, rhythmic eye movements (nystagmus); and/or retinal degeneration. Some affected individuals may also have additional symptoms and findings, such as involuntary, rapid, jerky movements (chorea); relatively slow, writhing motions that appear to “flow” into one another (athetosis); increased muscle stiffness (rigidity) with associated twisting or distorted posturing of affected muscles (dystonia); and/or other abnormalities. Most forms of OPCA are inherited as autosomal dominant traits; however, autosomal recessive forms have also been identified.

Opiate:

 Any preparation or derivative of opium.

Opioids:

Means “like or similar to opium” and refers to medications with opium-like effects. This term is used to describe any synthetic drug that possesses the characteristic properties of opiate narcotics but is not derived from opium.

Organic:

(1) Referring to or arising from an organ or organs. (2) Regarding substances that arise or are derived from living organisms. (3) Pertaining to chemicals that contain carbon.

Orthostatic hypotension:

A sudden decrease in blood pressure that occurs when the affected individual sits up or stands. In some cases, it may occur as a side effect of certain medications.

Hours of Opperation

Monday -Thursday : 8:00am – 5:00pm