Embodiment and the origin of interval timing: kinematic and electromyographic data

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Addyman, Caspar; Rocha, Sinead; Fautrelle, Lilian; French, Robert M.; Thomas, Elizabeth and Mareschal, Denis. 2017. Embodiment and the origin of interval timing: kinematic and electromyographic data. Experimental Brain Research, 235(3), pp. 923-930. ISSN 0014-4819 [Article]

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Official URL: http://doi.org/10.1007/s00221-016-4842-y

Abstract or Description

Recent evidence suggests that interval timing (the judgment of durations lasting from approximately 500 ms. to a few minutes) is closely coupled to the action control system. We used surface electromyography (EMG) and motion capture technology to explore the emergence of this coupling in 4-, 6-, and 8-month-olds. We engaged infants in an active and socially relevant arm-raising task with seven cycles and response period. In one condition, cycles were slow (every 4 s); in another, they were fast (every 2 s). In the slow condition, we found evidence of time-locked sub-threshold EMG activity even in the absence of any observed overt motor responses at all three ages. This study shows that EMGs can be a more sensitive measure of interval timing in early development than overt behavior.

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Article

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https://doi.org/10.1007/s00221-016-4842-y