Tremors are a defining characteristic of Parkinson’s disease, affecting about 8 out of 10 people with this movement disorder. Many people think the involuntary shaking motion is the main problem for ...

Involuntary movements include tremors, muscle spasms, tics, and others. Some medical conditions that affect muscles, nerves, the brain, or spinal cord can cause them, such as multiple sclerosis, ...

Oscillopsia makes you see things moving when they are not. It is often linked to problems with the brain, inner ear, or eyes. Oscillopsia usually goes away once the underlying issue is treated.