From sounds to movement and back : how movement shapes internal representation of musical rhythms
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1
Institute of Neuroscience, Université catholique de Louvain, Belgium
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2
BRAMS, Université de Montréal, Canada
The perception of beat and meter when listening to musical rhythms is an extremely common ability that allows people to synchronize to music. The rhythms are spontaneously structured by the listener into beat and meter, i.e., multiple periodic levels, even if the acoustic input is not strictly periodic. However, how musical rhythms are embodied in brain structures remains unclear. Using EEG to record beat- and meter-related steady-state evoked potentials, we investigated how body movements involving motor, proprioceptive and vestibular systems shape the internal representation of an ambiguous polyrhythm (i.e. a rhythm that can be perceived in different meters). We recorded the EEG while participants listened to such ambiguous polyrhythm, before and after a body movement training session aiming to disambiguate the perception of this rhythm by favoring the ternary meter. We found that brain activities recorded before the movement session faithfully followed the structure of the sound envelope, with no selective enhancement at specific frequencies. In contrast, the steady-state evoked potentials recorded during the listening session performed after the body movement training were significantly enhanced at frequencies corresponding to the ternary metric interpretation to which they moved during the movement training. These results provide evidence that movement shapes selectively the perception and neural representations of rhythm as captured with EEG. Moreover, these results help to progress in our understanding of the neural dynamics underlying auditory–motor integration, as captured in the context of musical rhythm.
Keywords:
Rhythm perception,
music cognition,
EEG,
steady-state evoked potentials,
sensorimotor integration,
neural entrainment
Conference:
14th Rhythm Production and Perception Workshop Birmingham 11th - 13th September 2013, Birmingham, United Kingdom, 11 Sep - 13 Sep, 2013.
Presentation Type:
Oral Presentation
Topic:
Rhythm Production and Perception
Citation:
Nozaradan
S,
Chemin
B and
Mouraux
A
(2013). From sounds to movement and back : how movement shapes internal representation of musical rhythms.
Conference Abstract:
14th Rhythm Production and Perception Workshop Birmingham 11th - 13th September 2013.
doi: 10.3389/conf.fnhum.2013.214.00044
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Received:
17 Jun 2013;
Published Online:
24 Sep 2013.
*
Correspondence:
Dr. Sylvie Nozaradan, Institute of Neuroscience, Université catholique de Louvain, Brussels, Belgium, sylvie.nozaradan@uclouvain.be