Sleep paralysis

What it means

Inability to move trunk and limbs and inability to speak during transition into or out of sleep; awareness is preserved and recall is present.

Sleep paralysis is associated with the transition from or to the REM stage of sleep.

Rare diseases that can present with this3

The range is how often this sign appears among people diagnosed with each disease — it is not a probability of having any of them. Many of these signs also occur in common, non-rare conditions. A sign on this page is a conversation to have with a clinician, not a conclusion.

Part of the broader category