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. Author manuscript; available in PMC: 2013 May 1.
Published in final edited form as: Neuroimage. 2012 Feb 23;60(4):2335–2345. doi: 10.1016/j.neuroimage.2012.02.040

Figure 1. Time-Frequency Analysis at Two Auditory Sites.

Figure 1

Depicted here are the time-frequency results for both forward and reverse speech trials at two electrode sites of Patient 7 that were classified as Auditory. Similar to our previous studies (Brown et al., 2008), task-related gamma-augmentations exhibit a broadband nature (Crone et al., 2011) that is largely contained within the range from 50- to 150-Hz. Alpha/beta-attenuations can be seen to approximately correspond with gamma-augmentation. Within the auditory category, we observed two subtypes of temporal profiles: (i) those with gamma-augmentation that extended throughout the stimulus duration (top electrode) and (ii) those with gamma-augmentation primarily during the very early portions of the stimulus (bottom electrode). These were not separated in comparison analyses. The baseline reference extends over a 400-ms silent period occurring prior to stimulus onset. Stimulus questions range from 1- to 2.5-s in duration. STG = Superior Temporal Gyrus. STS = Superior Temporal Sulcus.