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    Title: Sensory gating, inhibition control and gamma oscillations in the human somatosensory cortex
    Authors: 蔡尚岳
    Cheng, Chia-Hsiung;Chan, Pei-Ying S.;Niddam, David M.;Tsai, Shang-Yueh;Hsu, Shih-Chieh;Liu, Chia-Yih
    Contributors: 應物所
    Date: 2016-02
    Issue Date: 2016-05-30 15:22:48 (UTC+8)
    Abstract: Inhibiting the responses to irrelevant stimuli is an essential component of human cognitive function. Pre-attentive auditory sensory gating (SG), an attenuated neural activation to the second identical stimulus, has been found to be related to the performance of higher-hierarchical brain function. However, it remains unclear whether other cortical regions, such as somatosensory cortex, also possess similar characteristics, or if such a relationship is modality-specific. This study used magnetoencephalography to record neuromagnetic responses to paired-pulse electrical stimulation to median nerve in 22 healthy participants. Somatosensory SG ratio and cortical brain oscillations were obtained and compared with the behavioral performance of inhibition control, as evaluated by somatosensory and auditory Go-Nogo tasks. The results showed that somatosensory P35m SG ratio correlated with behavioral performance of inhibition control. Such relationship was also established in relation to the auditory Go-Nogo task. Finally, a higher frequency value of evoked gamma oscillations was found to relate to a better somatosensory SG ability. In conclusion, our data provided an empirical link between automatic cortical inhibition and behavioral performance of attentive inhibition control. This study invites further research on the relationships among gamma oscillations, neurophysiological indices, and behavioral performance in clinical populations in terms of SG or cortical inhibition.
    Relation: Scientific Reports, Vol.4, No.6, pp.20437
    Data Type: article
    DOI 連結: http://dx.doi.org/10.1038/srep20437
    DOI: 10.1038/srep20437
    Appears in Collections:[應用物理研究所 ] 期刊論文

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