What does the term "Restless Legs Syndrome" refer to?

The term "Restless Legs Syndrome" refers to a neurological disorder that is characterized by an uncontrollable urge to move the legs. Individuals suffering from this condition typically experience uncomfortable sensations in their legs, which can often be alleviated temporarily by movement. These sensations usually occur during periods of inactivity, such as when sitting or lying down, and they can significantly disrupt sleep and overall quality of life.

In contrast, other options pertain to different conditions or phenomena. For instance, frequent night terrors relate to a sleep disorder that causes sudden awakenings, which is not relevant to the definition of Restless Legs Syndrome. Additionally, anxiety disorders affect sleep quality but do not specifically involve leg movements or discomfort in the way that Restless Legs Syndrome does. Finally, vivid dreams are typically associated with a specific stage of sleep, notably REM (Rapid Eye Movement) sleep, which again does not encapsulate the symptoms of Restless Legs Syndrome.