Sleep talking, or somniloquy, is the act of speaking during sleep.

Catathrenia is distinct from both somniloquy and obstructive sleep apnea.

Sleep talking (or somniloquy)

This is the stage in which parasomnias such as night terrors, nocturnal enuresis, sleepwalking, and somniloquy occur.

On "Somniloquy" (also from Temporal Angels) he combines koto, english horn, and choir.

The transcriptions of his lengthy somniloquy led to what is known as the Stream of unconsciousness (narrative mode) method of writing.

According to Lane the track is a result of somniloquy, "I woke up one morning and my boyfriend said, 'You said the weirdest thing in your sleep last night'.

In 2003, Saunders began sleeping with a cassette recorder and documenting both his dreams and somniloquy which led to a wealth of source material for both audio releases and books.

In literary criticism, stream of unconsciousness is a narrative mode that portrays an individual's point of view by transcribing the author's unconscious dialogue or somniloquy during sleep, in connection to his or her actions within a dream.

The audio recordings of Dion McGregor (1922-1994) can be perceived as one of the precursors of the 'stream of unconsciousness' writing style, although his monlogues and somniloquy were never transcribed and presented as such.