Disparate circuits underlying time perception
This 2011 Journal of Neuroscience paper [1] show dissociation between relative beat based timing localized to striatum and absolute duration based timing localized to cerebellum.
Given this dissociation , I'm not convinced that olivo-cerebellar absolute timing framework subserves or finesses the striatal relative timing framework as proposed in the 2014 Frontiers papers [2].
Further evidence against the unified model is from the 2010 PNAS paper [3] on cerebellar atrophy patients (SCA-6) which shows intact beat based timing abilities but deficient ability for absolute duration estimation.
If unified model of time perception is indeed correct then why does cerebellar atrophy spare beat based timing abilities and why is there a dissociation between the two timing mechanisms in fMRI?
Further, there is no mention of SCN - suprachiasmatic nucleus - which tracks day-night cycle.
So I think the two timing circuits are not unified but disparate mechanisms.
References:
[1] Teki, S., Grube, M., Kumar, S. and Griffiths, T.D., 2011. Distinct neural substrates of duration-based and beat-based auditory timing. Journal of Neuroscience, 31(10), pp.3805-3812.
https://www.jneurosci.org/content/31/10/3805.short
[2] Teki, S., Grube, M. and Griffiths, T.D., 2012. A unified model of time perception accounts for duration-based and beat-based timing mechanisms. Frontiers in integrative neuroscience, 5, p.90.
https://www.frontiersin.org/articles/10.3389/fnint.2011.00090/full
[3] Grube, M., Cooper, F.E., Chinnery, P.F. and Griffiths, T.D., 2010. Dissociation of duration-based and beat-based auditory timing in cerebellar degeneration. Proceedings of the National Academy of Sciences, 107(25), pp.11597-11601.
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