Parkinson’s disease

Definition

Parkinson's disease is a progressive neurodegenerative disorder characterized by the loss of dopamine-producing neurons in the substantia nigra. It primarily affects movement, causing tremors, stiffness, and bradykinesia (slowness of movement).

5 Must Know Facts For Your Next Test

1. Parkinson's disease results from the degeneration of dopaminergic neurons in the substantia nigra.
2. The primary symptoms include tremors at rest, muscle rigidity, bradykinesia, and postural instability.
3. Non-motor symptoms such as depression, cognitive impairment, and sleep disturbances are also common.
4. The exact cause of Parkinson's disease is unknown but involves a combination of genetic and environmental factors.
5. Levodopa is the most commonly used medication to manage symptoms by replenishing dopamine levels.

Review Questions

Related terms

Substantia Nigra: A region in the brain that plays an important role in reward and movement.

Dopamine:

A neurotransmitter involved in regulating movement, emotion, and pleasure.

Bradykinesia: A symptom characterized by slowness of movement often seen in disorders affecting the basal ganglia.