Sleep disorder
A sleep disorder, or sleep disturbance, was a type of medical condition that manifested during sleep.

Along with brain cancer and psychosis, sleep disorders were among the initial feared potential side effects of transporter use. ()

Some people had a condition where they stopped breathing momentarily as they slept. According to Quark, Rom had this condition, which made it necessary for his peace of mind that he monitor his brother with a listening device overnight. ()

Known sleep disorders
 Insomnia
 Sleepwalking

External link
 
Medical conditions
Sleep