Sylvie Nozaradan

Sylvie Nozaradan

Postdoctorate researcher (Chargé de recherches FNRS).

Coordinator : Pr. A. Mouraux

The topic of my research is how musical rhythm entrains the human brain activity. With the help of Profs André Mouraux and Isabelle Peretz, my co-supervisor in Canada, I developed during my PhD an approach to capture the neural mechanisms of musical beat in humans. Currently, I explore this approach as a mean to investigate human neural mechanisms such as neural entrainment, sensorimotor synchronization and multisensory integration. ​To this aim, I use surface and intracerebral EEG, coupled with auditory/visual stimulations, and motion recordings. Also, this research gives rise to thoughts about how and why mixing art and science in research activities.

 
Beat is one of the most fascinating musical dimensions. Feeling the beat in music refers to the spontaneous and universal ability to extract periodicities from stimuli that are not strictly periodic in reality. Since childhood, we are able to move in synchrony with music, without necessarily being a music expert and without consciously planning to move on the beat.
Through several models (synthesized in the “Dynamic attending” model, and later developed in the “Resonance theory for beat perception”), theorists have hypothesized that beat perception is subtended by an entrainment of neuronal populations at the frequency of the beat. This neuronal entrainment would allow the binding of distant cortical areas through synchrony of their activity. For example, neural activity from auditory and motor cortices, frequency-tuned to the beat, would subtend sensorimotor synchronization to the beat when listening to music. Similarly, binding by synchrony would constitute the mean by which activities from distinct sensory cortices integrate into a unique multisensory percept.
Our objective is to provide experimental evidence of these hypotheses using electroencephalography (EEG). Indeed, the high temporal resolution of this technique is ideal to explore the neural correlate of beat perception, as this process is dynamic in nature. Among the various manners for eliciting a neuronal response recordable with EEG, the steady-state evoked potentials seems particularly suitable and original to study musical beat perception (Regan, 1989). Using EEG and steady-state evoked potentials, we explore the specific sensorimotor binding occurring in the context of entrainment at the frequency range of music tempo. We also explore multisensory binding by synchrony in the context of multisensory beats induction, and the neuronal correlates of this perceptual dynamic integration through frequency-tuning. 
See also my personal website (link).

Publications

EEG frequency-tagging and input-output comparison in rhythm perception

Nozaradan S, Keller PE, Rossion B, Mouraux A. Brain Topogr (2017); in press.

Frequency-tagging to track the neural processing of contrast in fast continuous sound sequences

Nozaradan S, Mouraux A, Cousineau M. J Neurophysiol (2017); 118(1):243-253. [PDF]

Intracerebral evidence of rhythm transform in the human auditory cortex

Nozaradan S, Mouraux A, Jonas J, Colnat-Coulbois S, Rossion B, Maillard L. Brain Struct Func (2017); 222(5):2389-2404. [PDF]

Enhanced brainstem and cortical encoding of sound during synchronized movement

Nozaradan S, Schönwiesner M, Caron-Desrochers L, Lehmann A. Neuroimage (2016); 142:231-240. [PDF]

Measuring Neural Entrainment to Beat and Meter in Infants: Effects of Music Background.

Cirelli LK, Spinelli C, Nozaradan S, Trainor LJ. Front Neurosci (2016); 10:229. [PDF]

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Posters

Musical entrainment directly recorded in the depth of the frontal, temporal and parietal cortex.

Nozaradan S, Jonas J, Colnat-Coulbois S, Maillard L, Rossion B, Mouraux A. Auditory Cortex Conference. Magdeburg (Germany), Sept 2014.

Neural entrainment to musical rhythms in the human auditory cortex, as revealed by intracerebral recordings.

Nozaradan S, Jonas J, Colnat-Coulbois S, Maillard L, Rossion B, Mouraux A. ICON. Brisbane (Australia), Jul 2014.

Neural entrainment to musical rhythms in the human auditory cortex, as revealed by intracerebral recordings.

Nozaradan S, Jonas J, Colnat-Coulbois S, Maillard L, Rossion B, Mouraux A. Neuromusic Conference. Dijon (France), Jun 2014.

Body movement shapes selectively the neural representation of musical rhythm.

 Chemin B, Mouraux A, Nozaradan S. Neuromusic Conference. Dijon (France), Jun 2014.

Neural entrainment to musical rhythms in the human auditory cortex, as revealed by intracerebral recordings.

Nozaradan S, Jonas J, Colnat-Coulbois S, Maillard L, Rossion B, Mouraux A. ICCN. Berlin (Germany), March 2014.

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Awards

Award for the best oral presentation. Perspectives on Rhythm and Timing (PoRT workshop)

Nozaradan S (2012). Selective neuronal synchronization to the beat and meter embedded in a musical rhythm. Glasgow (UK), Jul. 2012.

Grant of the Belgian Foundation for Vocation 2011

Nozaradan S (2011; supervisor: Mouraux A & Peretz I).

PhD student Exchange Grant of the European Commission ACN Erasmus Mundus Network

Nozaradan S (2011; supervisors: Mouraux A & Peretz I).

Research projects

Musical rhythm and frequency-tagging to study the neural dynamics of multisensory integration and sensorimotor synchronization

Investigators : Sylvie Nozaradan, Baptiste Chemin, Isabelle Peretz, André Mouraux. How dynamic inputs entrain brain activity to build our internal representation of the external world is one of the most challenging problems currently confronting cognitive neurosciencists. This project investigates...