Abstract
The early auditory-evoked gamma band response (EAGBR) may serve as an index of the integrity of fast recurrent inhibition or synaptic connectivity in the auditory cortex, where abnormalities in individuals with schizophrenia have been consistently found. The EAGBR has been rarely investigated in first episode schizophrenia patients (FESZ) and individuals at clinical high risk (CHR) for schizophrenia, and never been compared directly between these populations nor evaluated longitudinally. Here we examined the EAGBR in FESZ, CHR, and matched healthy controls (HC) at baseline and 1-year follow-up assessments to determine whether the EAGBR was affected in these clinical groups, and whether any EAGBR abnormalities changed over time. The electroencephalogram was recorded with a dense electrode array while subjects (18 FESZ, 18 CHR, and 40 HC) performed an auditory oddball task. Event-related spectral measures (phase locking factor [PLF] and evoked power) were computed on Morlet-wavelet-transformed single epochs from the standard trials. At baseline, EAGBR PLF and evoked power did not differ between groups. FESZ showed progressive reductions of PLF and evoked power from baseline to follow-up, and deficits in PLF at follow-up compared to HC. EAGBR peak frequency also increased at temporal sites in FESZ from baseline to follow-up. Longitudinal effects on the EAGBR were not found in CHR or HC, nor did these groups differ at follow-up. In conclusion, we detected neurophysiological changes of auditory cortex function in FESZ during a one-year period, which were not observed in CHR. These findings are discussed within the context of neurodevelopmental models of schizophrenia.
| Original language | English |
|---|---|
| Pages (from-to) | 145-152 |
| Number of pages | 8 |
| Journal | Schizophrenia research |
| Volume | 208 |
| DOIs | |
| Publication status | Published - Jun 2019 |
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All Science Journal Classification (ASJC) codes
- Psychiatry and Mental health
- Biological Psychiatry
Cite this
Progressive reduction of auditory evoked gamma in first episode schizophrenia but not clinical high risk individuals. / Oribe, Naoya; Hirano, Yoji; del Re, Elisabetta; Seidman, Larry J.; Mesholam-Gately, Raquelle I.; Woodberry, Kristen A.; Wojcik, Joanne D.; Ueno, Takefumi; Kanba, Shigenobu; Onitsuka, Toshiaki; Shenton, Martha E.; Goldstein, Jill M.; Niznikiewicz, Margaret A.; McCarley, Robert W.; Spencer, Kevin M.
In: Schizophrenia research, Vol. 208, 06.2019, p. 145-152.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Progressive reduction of auditory evoked gamma in first episode schizophrenia but not clinical high risk individuals
AU - Oribe, Naoya
AU - Hirano, Yoji
AU - del Re, Elisabetta
AU - Seidman, Larry J.
AU - Mesholam-Gately, Raquelle I.
AU - Woodberry, Kristen A.
AU - Wojcik, Joanne D.
AU - Ueno, Takefumi
AU - Kanba, Shigenobu
AU - Onitsuka, Toshiaki
AU - Shenton, Martha E.
AU - Goldstein, Jill M.
AU - Niznikiewicz, Margaret A.
AU - McCarley, Robert W.
AU - Spencer, Kevin M.
PY - 2019/6
Y1 - 2019/6
N2 - The early auditory-evoked gamma band response (EAGBR) may serve as an index of the integrity of fast recurrent inhibition or synaptic connectivity in the auditory cortex, where abnormalities in individuals with schizophrenia have been consistently found. The EAGBR has been rarely investigated in first episode schizophrenia patients (FESZ) and individuals at clinical high risk (CHR) for schizophrenia, and never been compared directly between these populations nor evaluated longitudinally. Here we examined the EAGBR in FESZ, CHR, and matched healthy controls (HC) at baseline and 1-year follow-up assessments to determine whether the EAGBR was affected in these clinical groups, and whether any EAGBR abnormalities changed over time. The electroencephalogram was recorded with a dense electrode array while subjects (18 FESZ, 18 CHR, and 40 HC) performed an auditory oddball task. Event-related spectral measures (phase locking factor [PLF] and evoked power) were computed on Morlet-wavelet-transformed single epochs from the standard trials. At baseline, EAGBR PLF and evoked power did not differ between groups. FESZ showed progressive reductions of PLF and evoked power from baseline to follow-up, and deficits in PLF at follow-up compared to HC. EAGBR peak frequency also increased at temporal sites in FESZ from baseline to follow-up. Longitudinal effects on the EAGBR were not found in CHR or HC, nor did these groups differ at follow-up. In conclusion, we detected neurophysiological changes of auditory cortex function in FESZ during a one-year period, which were not observed in CHR. These findings are discussed within the context of neurodevelopmental models of schizophrenia.
AB - The early auditory-evoked gamma band response (EAGBR) may serve as an index of the integrity of fast recurrent inhibition or synaptic connectivity in the auditory cortex, where abnormalities in individuals with schizophrenia have been consistently found. The EAGBR has been rarely investigated in first episode schizophrenia patients (FESZ) and individuals at clinical high risk (CHR) for schizophrenia, and never been compared directly between these populations nor evaluated longitudinally. Here we examined the EAGBR in FESZ, CHR, and matched healthy controls (HC) at baseline and 1-year follow-up assessments to determine whether the EAGBR was affected in these clinical groups, and whether any EAGBR abnormalities changed over time. The electroencephalogram was recorded with a dense electrode array while subjects (18 FESZ, 18 CHR, and 40 HC) performed an auditory oddball task. Event-related spectral measures (phase locking factor [PLF] and evoked power) were computed on Morlet-wavelet-transformed single epochs from the standard trials. At baseline, EAGBR PLF and evoked power did not differ between groups. FESZ showed progressive reductions of PLF and evoked power from baseline to follow-up, and deficits in PLF at follow-up compared to HC. EAGBR peak frequency also increased at temporal sites in FESZ from baseline to follow-up. Longitudinal effects on the EAGBR were not found in CHR or HC, nor did these groups differ at follow-up. In conclusion, we detected neurophysiological changes of auditory cortex function in FESZ during a one-year period, which were not observed in CHR. These findings are discussed within the context of neurodevelopmental models of schizophrenia.
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UR - http://www.scopus.com/inward/citedby.url?scp=85064314995&partnerID=8YFLogxK
U2 - 10.1016/j.schres.2019.03.025
DO - 10.1016/j.schres.2019.03.025
M3 - Article
C2 - 31005464
AN - SCOPUS:85064314995
VL - 208
SP - 145
EP - 152
JO - Schizophrenia Research
JF - Schizophrenia Research
SN - 0920-9964
ER -