Catathrenia is distinct from both somniloquy and obstructive sleep apnea (OSA). In 1966, researchers worked to find links between heredity and somniloquy. Although extremely rare, people who experience somniloquy may sometimes speak in another language. Somniloquy appears to run in families. Somniloquy is an EP by English band Pram. In rare cases, adult-onset somniloquy is linked with a psychiatric disorder or nocturnal seizure. Somniloquy was rapidly eliminated and the patient demonstrated no adverse effects of treatment. Somniloquy can also be caused by depression, sleep deprivation, day-time drowsiness, alcohol, and fever.