You are preparing a 50-year-old woman for her polysomnogram. She describes to you a discomfort in her legs. This discomfort occurs when she is at rest and is most noticeable in the evenings. The discomfort compels her to move her legs and can make it hard for her to go to sleep. Movement temporarily relieves the discomfort. What is the diagnosis for the leg discomfort?
A. Restless legs syndrome
B. Periodic limb movement disorder
C. Sleep-related rhythmic movement disorder
D. Leg cramps
