Obdormition (/ˌɒbdɔːrˈmɪʃən/; from Latin obdormire "to fall asleep") is a medical term describing temporary numbness in a limb, often caused by constant pressure on nerves or lack of movement.[1] This is colloquially referred to as the limb "going to sleep" and is usually followed by paresthesia, colloquially called "pins and needles".
Obdormition is a numbness caused by prolonged pressure on a nerve, such as when a leg falls asleep if the legs are crossed for a prolonged period.