Eye twitching, medically termed myokymia, is a frequent condition experienced by many people. While it is usually harmless, caused by stress, fatigue, lack of sleep, or excessive caffeine, persistent ...

Medically reviewed by Brigid Dwyer, MD Key Takeaways Involuntary muscle movements happen when your body moves without you intending it, like with tics or tremors.  The causes of involuntary movements ...

People with Alzheimer's exhibit a loss of motor control along with cognitive decline, and one of the earliest signs of this decay can be spotted in involuntary eye movements known as saccades. These ...

Patients on antipsychotics need to be regularly monitored for signs of tardive dyskinesia, a medication-induced movement disorder diagnosed when the involuntary movements persist for at least a month ...

Athetosis and chorea are two types of involuntary movements that can occur in children and adults with neurological conditions, such as cerebral palsy. The movements have different features, and the ...

Staring into the eyes of Mona Lisa is unnerving. Regardless of your vantage point, Mona Lisa appears to shift her gaze to make eye contact and stare you down. What nonverbal cues do the movements of ...