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. Author manuscript; available in PMC: 2013 Nov 6.
Published in final edited form as: Curr Biol. 2012 Oct 18;22(21):2075–2080. doi: 10.1016/j.cub.2012.09.009

Figure 2.

Figure 2

Extrinsic whisker muscles twitch during active sleep. (A) Locations of EMG electrodes (black asterisks) in m. maxillolabialis and m. nasolabialis (also referred to as m. levator labii superioris in [8], from which this drawing is adapted). (B) Raw EMG record depicting twitching in the two extrinsic muscles as well as the nuchal muscle. Sharp spikes in the EMG records indicate myoclonic twitches. (C) Cross-correlograms showing highly correlated bouts of twitch activity for each pair of muscles. The horizontal dashed line indicates statistical significance.