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Frontal and cerebellar contributions to pitch and rhythm processing: a TMS study

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Abstract

Music represents a salient stimulus for the brain with two key features: pitch and rhythm. Few data are available on cognitive analysis of music listening in musically naïve healthy participants. Beyond auditory cortices, neuroimaging data showed the involvement of prefrontal cortex in pitch and of cerebellum in rhythm. The present study is aimed at investigating the role of prefrontal and cerebellar cortices in both pitch and rhythm processing. The performance of fifteen participants without musical expertise was investigated in a listening discrimination task. The task required to decide whether two eight-element melodic sequences were equal or different according to pitch or rhythm characteristics. Before the task, we applied a protocol of continuous theta burst transcranial magnetic stimulation interfering with the activity of the left cerebellar hemisphere (lCb), right inferior frontal gyrus (rIFG), or vertex (Cz-control site), in a within cross-over design. Our results showed that participants were more accurate in pitch than rhythm tasks. Importantly, the reaction times were slower following rIFG or lCb stimulations in both tasks. Notably, frontal and cerebellar stimulations did not induce any motor effect in right and left hand. The present findings point to the role of the fronto-cerebellar network in music processing with a single mechanism for both pitch and rhythm patterns.

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No funding was received for conducting this study.

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All authors contributed to the study conception and design. Material preparation, data collection and analysis were performed by Silvia Picazio, Barbara Magnani and Laura Petrosini. The first draft of the manuscript was written by Silvia Picazio and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.

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Correspondence to Silvia Picazio.

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The authors declare no competing interests.

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The authors have no relevant financial or non-financial interests to disclose.

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The datasets generated during and/or analysed during the current study are available from the corresponding author on reasonable request.

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Picazio, S., Magnani, B., Koch, G. et al. Frontal and cerebellar contributions to pitch and rhythm processing: a TMS study. Brain Struct Funct 229, 789–795 (2024). https://doi.org/10.1007/s00429-024-02764-w

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  • DOI: https://doi.org/10.1007/s00429-024-02764-w

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