Abstract
Subjective rhythmitisation refers to the human disposition to perceive a binary beat pattern when listening to isochronous equitone sequences, as exemplified by the “tick-tock” clock illusion. Despite continued controversy concerning the question whether beat perception is uniquely human, comparative research on non-human primates remains sparse. Here we provide first evidence for subjective rhythmitisation in two macaque monkeys. Human-like event-locked neural beta-frequency oscillatory dynamics (ERD/ERS) and beta-delta cross-frequency coupling (CFC) emerged while the animals passively listened to isochronous equitone sequences. Moreover, beta, gamma and beta-delta CFC were modulated following a subjective binary beat. These findings provide crucial evidence for the study of rhythm cognition, lending support to endogenous beat perception in non-human primates and supporting Darwin’s notion of shared basic rhythm capacities.
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