Muscle twitches fall into two main types. There’s myoclonus, where a whole muscle or group of muscles twitch or spasm. Then ...

Tic disorders are conditions featuring sudden, non-rhythmic movements or vocalizations. A formal tic disorder diagnosis is determined by tic frequency, duration, and type. Tics are non-rhythmic ...

At first glance, tics and body-focused repetitive behaviors (BFRBs) can look remarkably similar. Both involve repeated behaviors that may seem involuntary, often start in childhood or adolescence, and ...

Left eye twitching—a seemingly minor physical occurrence—has captivated human curiosity across cultures for centuries. While modern science attributes it to factors like fatigue or stress, various ...