Distinct neural mechanisms support inner speaking and inner hearing


A subjective distinction can be made between inner hearing—invoking speech representations from memory—and inner speaking—simulating the motor act of speech. A TMS study reveals that lip cortical excitability (“MEP”) increases more with inner speaking than with inner hearing, and that this effect is modulated by the phonetic content of what is produced mentally, hence objectivising the phenomenological distinction.

Ladislas Nalborczyk, Marieke Longcamp, Mireille Bonnard, Victor Serveau, Laure Spieser, and F.-Xavier Alario.
2023. Cortex 169: 161–73. —  @HAL.
Posted in Featured figure.