Sleep-related rhythmic movement disorder (RMD) involves repeated body motions which are usually observed when drowsy or asleep, typically in children. It is often accompanined by humming or other sounds that can be quite loud.
Episodes typically occur when your child is drowsy or actively engaged in a low-key activity such as listening to music or riding in a car. They may take place at any hour, either when trying to fall asleep or already dozing off.
The rate can differ, but the movements are typically rapid. Generally, one or two motions happen once or twice every second. An episode regularly spans 15 minutes until a noise, movement or voice interrupts your child and causes it to stop. Older children who can talk may not remember the episode in the morning.
It is typical for infants and children to produce these motions and sounds. However, it should be noted that if they become overly disruptive or harmful, it may need to be considered a disorder. It is pertinent to note that the noises can cause distress among other relations in the house. Understandably, parents may start worrying in this case; therefore, it is wise to engage with caretakers, relatives or babysitters regarding the issue.
Traditional RMD, Roth RMD, Inherited RMD and SEPP RMD.
Your child may rock their body while on hands and knees, as well as when sitting up. This rocking motion is a way of self-soothing for them.
Head banging is a common occurrence; while lying face down, your child will raise his head or upper body, only to slam it back down into the pillow or mattress. This action can also be seen when your child is in a seated position; he'll bang the back of their head against the wall or headboard frequently. To add to this, body rocking and head banging may be combined with each other as your little one rocks on their hands and knees, banging their forehead against the wall or headboard.
Head rolling is a movement in which the head is moved from side to side while your child is resting on their back.
Head banging is a distressing issue, particularly in babies and toddlers, which carries little risk of serious harm. Although your child can create loud noises when they hit the bed frame with their head, it's also possible for the bed to bang against the wall or scrape against the floor.
Less common rhythmic movement forms include the following:
Body rolling
Leg banging
Leg rolling