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Whose voice is the one in your head?

It runs on the same machinery you talk out loud with. And some people have no voice at all.

by kuz brain
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The short answer

The voice in your head is your own brain narrating. Inner speech recruits the same speech-production machinery you use when you talk out loud, including Broca's area in the left frontal lobe, minus the final motor command that moves your lips and tongue. It is largely automatic, which is why it is so hard to switch off on demand. But it is not universal. The experience of inner speech runs from near constant to nonexistent across people, and in 2024 researchers named the low end anendophasia. Some people genuinely think without a voice at all.

Transcript

There's a voice in your head, right now, reading these words. That voice. Try to make it stop. Total silence.

You can't, can you?

You never chose to start it. You can't choose to end it. It just talks.

So who is talking, and who is listening?

There are two of you in here. A voice that narrates your whole life, and a silent something that hears it.

You've spent every second with that narrator. But the listener, the one reading this right now, you have never even met.

And some people? They have no voice at all. Just silence.

You are not the voice in your head. You are the silence that hears it.

So... is it quiet in there now?

Sources

  1. Alderson-Day, B., Fernyhough, C. (2015). "Inner Speech: Development, Cognitive Functions, Phenomenology, and Neurobiology." Psychological Bulletin, 141(5), 931-965. DOI: 10.1037/bul0000021. The standard review of inner speech, establishing that covert verbal thinking is generated by the same language-production system used for overt speech and is implicated in speech monitoring, working memory, and executive function. Open source
  2. Stephane, M., et al. (2021). "Keeping the inner voice inside the head, a pilot fMRI study." Brain and Behavior, 11(4), e02042. DOI: 10.1002/brb3.2042. Imaging work consistent with a body of evidence placing inner speech in the left inferior frontal gyrus, which includes Broca's area, alongside the supplementary motor area and auditory regions, with weaker activation than overt speech because the final articulatory command is withheld. Open source
  3. Nedergaard, J. S. K., Lupyan, G. (2024). "Not Everybody Has an Inner Voice: Behavioral Consequences of Anendophasia." Psychological Science, 35(7), 780-797. DOI: 10.1177/09567976241243004. Four studies introducing the term anendophasia for the absence of inner speech and showing that adults reporting little or no inner voice performed differently on verbal working-memory and rhyme-judgment tasks, evidence that the experience of inner speech varies from near constant to nonexistent. Open source
  4. Heavey, C. L., Hurlburt, R. T. (2008). "The phenomena of inner experience." Consciousness and Cognition, 17(3), 798-810. Using Descriptive Experience Sampling, which beeps participants at random moments and asks what was in awareness, the authors found inner speech present in roughly a quarter of sampled moments on average, with enormous person-to-person variation rather than a constant monologue for everyone. Open source

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