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2015 ; 9
(ä): 159
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Neural Networks for Beat Perception in Musical Rhythm
#MMPMID26635549
Large EW
; Herrera JA
; Velasco MJ
Front Syst Neurosci
2015[]; 9
(ä): 159
PMID26635549
show ga
Entrainment of cortical rhythms to acoustic rhythms has been hypothesized to be
the neural correlate of pulse and meter perception in music. Dynamic attending
theory first proposed synchronization of endogenous perceptual rhythms nearly 40
years ago, but only recently has the pivotal role of neural synchrony been
demonstrated. Significant progress has since been made in understanding the role
of neural oscillations and the neural structures that support synchronized
responses to musical rhythm. Synchronized neural activity has been observed in
auditory and motor networks, and has been linked with attentional allocation and
movement coordination. Here we describe a neurodynamic model that shows how
self-organization of oscillations in interacting sensory and motor networks could
be responsible for the formation of the pulse percept in complex rhythms. In a
pulse synchronization study, we test the model's key prediction that pulse can be
perceived at a frequency for which no spectral energy is present in the amplitude
envelope of the acoustic rhythm. The result shows that participants perceive the
pulse at the theoretically predicted frequency. This model is one of the few
consistent with neurophysiological evidence on the role of neural oscillation,
and it explains a phenomenon that other computational models fail to explain.
Because it is based on a canonical model, the predictions hold for an entire
family of dynamical systems, not only a specific one. Thus, this model provides a
theoretical link between oscillatory neurodynamics and the induction of pulse and
meter in musical rhythm.