You're relaxing on the sofa when suddenly your eyelid starts twitching. Or perhaps it's a muscle in your arm, your leg, or ...

Though many people experience muscle twitching, it's often incorrectly identified as a muscle spasm. While both are involuntary contractions of a muscle, muscle spasms and muscle twitching aren't ...

Medically reviewed by Nicholas R. Metrus, MDMedically reviewed by Nicholas R. Metrus, MD Almost all of us will have experienced a fasciculation at one time or another. A fasciculation is simply a ...

We've all been there before. Running along the basketball court or swimming across the pool, when, all of a sudden, we experience a sharp pain in our foot or leg. Muscle cramps are common, affect ...

Tweaked by a muscle twitch? From an uncontrollable fluttering eyelid to a pulsing calf muscle, these small, rapid involuntary muscle contractions may happen at any time — and can be annoying. A common ...

Do your muscles still spasm after a run? This is most likely muscle fasciculation, where the voluntary muscle units are randomly firing and not under the usual central nervous system neurologic ...

Doctors identify these movements as 'fasciculations', because they occur when individual nerve fibers, which control small muscle groups activate independently to produce brief muscle contractions.

Isaacs’ syndrome is a disorder that affects the peripheral nervous system. It’s sometimes classified as an autoimmune disorder, but not always. Some of these terms are used inconsistently to refer to ...

ALS, or amyotrophic lateral sclerosis, is a progressive neurodegenerative disorder affecting the motor neurons in the central nervous system. The early symptoms of ALS include muscle twitching or ...

Eye twitching is an involuntary movement that can be harmless or signify a more serious condition, such as multiple sclerosis. If twitching occurs for more than a few days, it is important to speak ...