Sleep Centre – Online Class:

“Periodic Limb Movements (PLMs) Periodic limb movement disorder affects people only during sleep.  The condition is characterized by behavior ranging from shallow, continual movement of the ankle or toes, to wild and strenuous kicking and flailing of the legs and arms.  Movement of the legs is more typical than movement of the arms in cases of PLMs.  Movements typically occur for 0.5 to 10 seconds, in intervals separated by five to 90 seconds. These limb movements usually occur in deep stage two sleep, but often cause arousal. Thus, PLMs can cause poor sleep, which may lead to sleep maintenance insomnia and/or excessive daytime sleepiness. Frequently, the bed partner is aware of these movements as they are hit, kicked or punched during the night.  Additionally, the bottom bed sheet may be thread-bare in one spot sooner than the rest.  This may be caused by your heels rubbing in the same spot frequently at night.  Bedding in disarray is also a well known feature of PLMs”

This is a great article stating that acting out nightmares/dreams can cause sleep deprivation. The cause of nightmares is unclear. I pray for great sleep for us and the world.