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Abstract #4648

Infrequent auditory stimuli elicit BOLD signals of shorter duration

Jo-Fu Lotus Lin1, Yi-Ting Lin1, Juan Silva-Pereyra2, and Fa-Hsuan Lin1,3

1Institute of Biomedical Engineering, National Taiwan University, Taipei, Taiwan, 2Facultad de Estudios Superiores Iztacala (FES-I), Universidad Nacional Autónoma de México, Mexico City, Mexico, 3Department of Neuroscience and Biomedical Engineering, Aalto University, Espoo, Finland

To characterize the hemodynamic responses of mismatch negativity, we measured BOLD signals elicited by frequent and infrequent sequences of sounds using fast fMRI acquisitions with 0.1 s precision. The average temporal width of the hemodynamic responses was 4.2 s in the superior temporal areas. The width of hemodynamic responses was significantly wider in the standard (4.9 s +/- 1.1 s) than the deviant trials (3.6 s +/- 1.7 s).

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