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. Author manuscript; available in PMC: 2015 Aug 15.
Published in final edited form as: J Neurosci Methods. 2014 Jun 24;233:155–165. doi: 10.1016/j.jneumeth.2014.06.022

Figure 8. Examination of chewing artifacts recorded with monopolar and bipolar electrodes.

Figure 8

The squared difference between the raw and smoothed field potential (Δ2, see Materials and methods), recorded from the visual cortex (at the same location as that yielding the visual evoked potential in Fig. 7d.). Gray shaded area indicates the period of mastication. Upper panels, Δ2 calculated from monopolar recording. Lower panels, differential Δ2 calculated from bipolar recordings. The monkey had been chewing soft food (raisins) in (a) and hard food (banana chips) in (b).