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Specialty. Neurology, ophthalmology. Blepharospasm is a neurological disorder characterized by intermittent, involuntary spasms and contractions of the orbicularis oculi (eyelid) muscles around both eyes. [1][2][3][4] These result in abnormal twitching or blinking, and in the extreme, sustained eyelid closure resulting in functional blindness.
Myoclonus. Myoclonus is a brief, involuntary, irregular (lacking rhythm) twitching of a muscle, a joint, or a group of muscles, different from clonus, which is rhythmic or regular. Myoclonus (myo- "muscle", clonus "spasm") describes a medical sign and, generally, is not a diagnosis of a disease. It belongs to the hyperkinetic movement disorders ...
Rapid eye movement behavior disorder occurs when there is a loss of normal voluntary muscle atonia during REM sleep resulting in motor behavior in response to dream content. It can be caused by adverse reactions to certain drugs or during drug withdrawal; however, it is most often associated with the elderly and in those with neurodegenerative ...
Here's the five-step process that proponents of this sleep hack say will help you conk out in any stressful situation in just 120 seconds: Step 1: Lie on your back with eyes closed and relax all ...
Saccade. A saccade (/ səˈkɑːd / sə-KAHD; French: [sakad]; French for 'jerk') is a quick, simultaneous movement of both eyes between two or more phases of fixation in the same direction. [1] In contrast, in smooth-pursuit movements, the eyes move smoothly instead of in jumps. The phenomenon can be associated with a shift in frequency of an ...
The 20-20-20 rule: "Every 20 minutes, look into the distance about 20 feet away or leave your desk for about 20 seconds," says Maturi, adding that this can increase your blink rate and move your ...
Evaporative dry eye symptoms include: Awakening with a dry eye feeling. Eye irritation. Feeling like your eyelids are stuck to your eyeballs. Red eyes. The less common form of dry eye is aqueous ...
Rapid eye movement sleep (REM sleep or REMS) is a unique phase of sleep in mammals (including humans) and birds, characterized by random rapid movement of the eyes, accompanied by low muscle tone throughout the body, and the propensity of the sleeper to dream vividly. The REM phase is also known as paradoxical sleep (PS) and sometimes ...