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. Author manuscript; available in PMC: 2016 Jan 1.
Published in final edited form as: Clin Neurophysiol. 2014 Apr 18;126(1):17–26. doi: 10.1016/j.clinph.2014.03.034

Figure 2. Gamma-augmentation during naming tasks in patient #5.

Figure 2

(A) Green electrodes: sites showing significant gamma-augmentation elicited by naming of unambiguous and ambiguous images. Blue electrodes: significant gamma-augmentation elicited by naming of unambiguous images alone. Red electrodes: significant gamma-augmentation elicited by naming of ambiguous images alone. White electrodes: no significant gamma-augmentation elicited by either naming task. (B) Time-frequency plots are presented with the zero point reflecting the onset of image presentation. Channel #1 in the left occipital pole showed significant gamma-augmentation within 100 ms following the onset of presentation of unambiguous and ambiguous images; naming of unambiguous images was associated with more sustained gamma-augmentation. Channel #2 in the lateral occipital region showed significant gamma-augmentation within 200 ms following the presentation of unambiguous images, while gamma-augmentation elicited by ambiguous images failed to reach significance. Channel #3 in the left inferior parietal lobule was associated with significant gamma-augmentation at 810–940 ms following the presentation of ambiguous images but no significant gamma-augmentation during naming of unambiguous ones. Channel #4 in the left orbitofrontal region was associated with significant gamma-augmentation at 860–1190 ms following the presentation of ambiguous images but no significant gamma-augmentation during naming of unambiguous ones. (C) Time-frequency plots are presented with the zero point reflecting the onset of responses. Channel #4 in the left orbitofrontal region and channel #5 in the left inferior-frontal region were associated with significant gamma-augmentation prior to responses to ambiguous images alone. Channel #6 in the left Rolandic region was associated with significant gamma-augmentation around the onset of responses to both ambiguous and unambiguous images. The mean response time was 1930 ms during naming of ambiguous images and 1140 ms during that of unambiguous ones.