Periodic leg movement
Under periodic leg movements or generalized periodic limb movements (English: Periodic Limb Movement , PLM) are repetitive, involuntary movements of the legs and arms to understand. They occur during sleep (then called PLMS) or while awake (then called PLMW).
There are no standard values for the frequency of periodic movements in the various age groups. They occur at a young age and around 30% of those over 50 are affected, but mostly without consequences such as sleep disorders or daytime sleepiness.
In connection with certain diseases, however, the sleep of those affected is no longer restful. In Periodic Limb Movement Disorder (PLMD), a sleep disorder described as an independent syndrome , periodic movements are particularly frequent and sufferers complain of daytime sleepiness and disturbed night sleep.
In restless legs syndrome (RLS), there is a typical urge to move in the legs when awake, which plagues those affected and often prevents them from falling asleep. Many of the people affected by RLS also have periodic movements during sleep.
An examination to be carried out in the sleep laboratory , the polysomnography , can determine how often PLMS occur and whether other diseases are not present and lead to the symptoms. The periodic leg movements are counted per hour (PMLI = Periodic Limb Movement Index). A PLMI below 5 is defined as normal, below 25 as mild, below 50 as moderate, and above 50 as severe.
- R. Natarajan: Review of periodic limb movement and restless leg syndrome. In: Journal of postgraduate medicine. Volume 56, Number 2, 2010 Apr-Jun, pp. 157-162, doi: 10.4103 / 0022-3859.65284 . PMID 20622400 . (Review). .
- R. Natarajan: Review of periodic limb movement and restless leg syndrome. In: J Postgrad Med. [Serial online] 2010 [cited 2014 May 26]; 56, pp. 157-162.