TY - JOUR
T1 - Complementary fMRI and EEG evidence for more efficient neural processing of rhythmic vs. unpredictably timed sounds
AU - van Atteveldt, Nienke
AU - Musacchia, Gabriella
AU - Zion-Golumbic, Elana
AU - Sehatpour, Pejman
AU - Javitt, Daniel C.
AU - Schroeder, Charles
N1 - Publisher Copyright:
© 2015 van Atteveldt, Musacchia, Zion-Golumbic, Sehatpour, Javitt and Schroeder.
PY - 2015
Y1 - 2015
N2 - The brain's fascinating ability to adapt its internal neural dynamics to the temporal structure of the sensory environment is becoming increasingly clear. It is thought to be metabolically beneficial to align ongoing oscillatory activity to the relevant inputs in a predictable stream, so that they will enter at optimal processing phases of the spontaneously occurring rhythmic excitability fluctuations. However, some contexts have a more predictable temporal structure than others. Here, we tested the hypothesis that the processing of rhythmic sounds is more efficient than the processing of irregularly timed sounds. To do this, we simultaneously measured functional magnetic resonance imaging (fMRI) and electro-encephalograms (EEG) while participants detected oddball target sounds in alternating blocks of rhythmic (e.g., with equal inter-stimulus intervals) or random (e.g., with randomly varied inter-stimulus intervals) tone sequences. Behaviorally, participants detected target sounds faster and more accurately when embedded in rhythmic streams. The fMRI response in the auditory cortex was stronger during random compared to random tone sequence processing. Simultaneously recorded N1 responses showed larger peak amplitudes and longer latencies for tones in the random (vs. the rhythmic) streams. These results reveal complementary evidence for more efficient neural and perceptual processing during temporally predictable sensory contexts.
AB - The brain's fascinating ability to adapt its internal neural dynamics to the temporal structure of the sensory environment is becoming increasingly clear. It is thought to be metabolically beneficial to align ongoing oscillatory activity to the relevant inputs in a predictable stream, so that they will enter at optimal processing phases of the spontaneously occurring rhythmic excitability fluctuations. However, some contexts have a more predictable temporal structure than others. Here, we tested the hypothesis that the processing of rhythmic sounds is more efficient than the processing of irregularly timed sounds. To do this, we simultaneously measured functional magnetic resonance imaging (fMRI) and electro-encephalograms (EEG) while participants detected oddball target sounds in alternating blocks of rhythmic (e.g., with equal inter-stimulus intervals) or random (e.g., with randomly varied inter-stimulus intervals) tone sequences. Behaviorally, participants detected target sounds faster and more accurately when embedded in rhythmic streams. The fMRI response in the auditory cortex was stronger during random compared to random tone sequence processing. Simultaneously recorded N1 responses showed larger peak amplitudes and longer latencies for tones in the random (vs. the rhythmic) streams. These results reveal complementary evidence for more efficient neural and perceptual processing during temporally predictable sensory contexts.
KW - Auditory cortex
KW - EEG
KW - FMRI
KW - Rhythm
KW - Sound processing
KW - Temporal context
UR - http://www.scopus.com/inward/record.url?scp=84947217495&partnerID=8YFLogxK
U2 - 10.3389/fpsyg.2015.01663
DO - 10.3389/fpsyg.2015.01663
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C2 - 26579044
SN - 1664-1078
VL - 6
JO - Frontiers in Psychology
JF - Frontiers in Psychology
IS - OCT
M1 - 1663
ER -