Periodic limb movement disorder involves repetitive movements of one's __________ during sleep, and is a common cause of poor sleep in people __________.

A) arms...under 12
B) arms...over 50
C) legs...under 12
D) legs...over 50

Periodic Limb Movement

Repeated involuntary movement of the limbs, typically occurring during sleep and often associated with sleep disturbances.

Repetitive Movements

Actions that are carried out the same way repeatedly, often seen in routines or as part of certain behavioral conditions.

Over 50

A term referring to individuals who are aged 50 years and above, often relating to discussions about aging, lifestyle, and healthcare.