Mu rhythm dynamics suggest automatic activation of motor and premotor brain regions during speech processing
Results are mixed regarding the question of whether listening to speech activates automatic speech specific neural processes, or whether such activity is due to general cognitive mechanisms such as attention and memory. We suggest that analyzing the dynamics of mu rhythms over the course of a trial...
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Veröffentlicht in: | Journal of neurolinguistics 2021-11, Vol.60, p.101006, Article 101006 |
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Sprache: | eng |
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Zusammenfassung: | Results are mixed regarding the question of whether listening to speech activates automatic speech specific neural processes, or whether such activity is due to general cognitive mechanisms such as attention and memory. We suggest that analyzing the dynamics of mu rhythms over the course of a trial using event-related spectral perturbations (ERSPs) is useful for disentangling the competing hypotheses. Our findings suggest that there is automatic activation of motor and premotor areas of the brain that occurs while passively listening to speech, and that this activation is not present while listening to noise. Moreover, this activation is more strongly present in the low alpha frequencies, which are associated with attention, when participants engage in active discrimination of stimuli, and late in the trial prior to a button press.
•We analyze EEG oscillations during active and passive listening to determine if they are due to speech or general cognition.•Results suggest that automatic activation of motor and premotor areas of the brain occurs during passive listening to speech.•Analysis of oscillatory changes can disentangling signals arising from speech-specific and general cognitive mechanisms. |
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ISSN: | 0911-6044 1873-8052 |
DOI: | 10.1016/j.jneuroling.2021.101006 |