In a study of 100 patients with PMLD, presented at CHEST 2011, the 77th annual meeting of the American College of Chest Physicians (ACCP), researchers from Toledo, Ohio divided the patients into those who were right-handed and those who were left-handed.
Of the 84 right-handed and 16 left-handed patients, 69% of right-handed patients had bilateral limb movements compared with 94% of left-handed patients, irrespective of age, sex, and race.
Their findings indicate that left-handed people have significantly higher chances of having bilateral limb movements, indicating the potential for PLMD.
Periodic limb movement disorder (PLMD), previously known as nocturnal myoclonus, is a sleep disorder where the patient moves limbs involuntarily during sleep, and has symptoms or problems related to the movement.
PLMD should not be confused with restless leg syndrome (RLS). RLS occurs while awake as well as when asleep, and when awake, there is a voluntary response to an uncomfortable feeling in the legs. PLMD on the other hand is involuntary, and the patient is often unaware of these movements altogether.
Contacts and sources:
American College of Chest Physicians