35% of people over 65 years old, and men and women are generally affected equally. It can also occur in younger people, although this is less common. PLMD is not considered medically serious, however, it may be an indicator of kidney disease, diabetes or anemia.

SYMPTOMS
Periodic Limb Movements (PLM's) are experienced most typically in the lower extremities. Repetitive contractions (leg jerk or upward flexing of the feet) occur about every 30 seconds, each lasting from .5 to 5 seconds. These episodes can last from a few minutes to an hour. High rates of depression, memory loss, attention deficits and fatigue have been

reported in studies of patients with PLMD.

TREATMENT
Several medications have been proven effective for Periodic Limb Movement Disorder, but treatment is generally only necessary if PLM's are accompanied by restless legs, insomnia or fatigue.