Internal monologue is thought to be partially controlled by corollary discharge, a type of brain signal. The researchers highlight the need for larger studies to untangle the overlap between the two. If you find it difficult to picture voluntary images in your head at all, you may have what’s known as a phantasia.Ī 2021 study indicates that people with aphantasia may also experience anaduralia, a term that’s now being used to describe the absence of auditory imagery - or the inner voice.īased on survey responses from self-reported aphantasics, a lack of internal monologue may co-occur with aphantasia. People with a hearing impairment may experience their inner monologue through signs or images. For example, you might “see” do-to lists in your head but not be able to “hear” yourself think. Not “hearing” your inner voice doesn’t necessarily mean you don’t have an internal monologue, though, because some people access it visually instead of auditorily. It’s unclear why some people don’t have an internal monologue, but researchers speculate it has to do with the way the dorsal stream matures, among other things. The emergence of inner speech is influenced by dorsal stream development. In childhood, the dorsal stream develops slower than the ventral stream. They’re also involved in auditory and visual processing. The dorsal and ventral streams are language tracts in the brain. One 2019 review of research suggests an association between dorsal pathway maturation and the emergence of inner speech in children. Researchers don’t fully understand why some people don’t have an inner voice. What about people who don’t have an internal monologue?
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