Open Access
Molecular Autism, volume 13, issue 1, publication number 20
Globally elevated excitation–inhibition ratio in children with autism spectrum disorder and below-average intelligence
Manyukhina Viktoriya O
1, 2
,
Prokofyev Andrey O.
1
,
Galuta Ilia A
1
,
Goiaeva Dzerassa E.
1
,
Obukhova Tatiana S.
1
,
Schneiderman Justin F.
3
,
Altukhov Dmitrii I
2
,
Stroganova Tatiana A.
1
,
Publication type: Journal Article
Publication date: 2022-05-12
Molecular Biology
Developmental Biology
Psychiatry and Mental health
Developmental Neuroscience
Abstract
Altered neuronal excitation–inhibition (E–I) balance is strongly implicated in ASD. However, it is not known whether the direction and degree of changes in the E–I ratio in individuals with ASD correlates with intellectual disability often associated with this developmental disorder. The spectral slope of the aperiodic 1/f activity reflects the E–I balance at the scale of large neuronal populations and may uncover its putative alternations in individuals with ASD with and without intellectual disability. Herein, we used magnetoencephalography (MEG) to test whether the 1/f slope would differentiate ASD children with average and below–average (< 85) IQ. MEG was recorded at rest with eyes open/closed in 49 boys with ASD aged 6–15 years with IQ ranging from 54 to 128, and in 49 age-matched typically developing (TD) boys. The cortical source activity was estimated using the beamformer approach and individual brain models. We then extracted the 1/f slope by fitting a linear function to the log–log-scale power spectra in the high-frequency range. The global 1/f slope averaged over all cortical sources demonstrated high rank-order stability between the two conditions. Consistent with previous research, it was steeper in the eyes-closed than in the eyes-open condition and flattened with age. Regardless of condition, children with ASD and below-average IQ had flatter slopes than either TD or ASD children with average or above-average IQ. These group differences could not be explained by differences in signal-to-noise ratio or periodic (alpha and beta) activity. Further research is needed to find out whether the observed changes in E–I ratios are characteristic of children with below-average IQ of other diagnostic groups. The atypically flattened spectral slope of aperiodic activity in children with ASD and below-average IQ suggests a shift of the global E–I balance toward hyper-excitation. The spectral slope can provide an accessible noninvasive biomarker of the E–I ratio for making objective judgments about treatment effectiveness in people with ASD and comorbid intellectual disability.
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Manyukhina V. O. et al. Globally elevated excitation–inhibition ratio in children with autism spectrum disorder and below-average intelligence // Molecular Autism. 2022. Vol. 13. No. 1. 20
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Manyukhina V. O., Prokofyev A. O., Galuta I. A., Goiaeva D. E., Obukhova T. S., Schneiderman J. F., Altukhov D. I., Stroganova T. A., Orekhova E. V. Globally elevated excitation–inhibition ratio in children with autism spectrum disorder and below-average intelligence // Molecular Autism. 2022. Vol. 13. No. 1. 20
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TY - JOUR
DO - 10.1186/s13229-022-00498-2
UR - https://doi.org/10.1186%2Fs13229-022-00498-2
TI - Globally elevated excitation–inhibition ratio in children with autism spectrum disorder and below-average intelligence
T2 - Molecular Autism
AU - Manyukhina, Viktoriya O
AU - Prokofyev, Andrey O.
AU - Galuta, Ilia A
AU - Goiaeva, Dzerassa E.
AU - Obukhova, Tatiana S.
AU - Schneiderman, Justin F.
AU - Altukhov, Dmitrii I
AU - Stroganova, Tatiana A.
AU - Orekhova, Elena V.
PY - 2022
DA - 2022/05/12 00:00:00
PB - Springer Nature
IS - 1
VL - 13
SN - 2040-2392
ER -
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@article{2022_Manyukhina,
author = {Viktoriya O Manyukhina and Andrey O. Prokofyev and Ilia A Galuta and Dzerassa E. Goiaeva and Tatiana S. Obukhova and Justin F. Schneiderman and Dmitrii I Altukhov and Tatiana A. Stroganova and Elena V. Orekhova},
title = {Globally elevated excitation–inhibition ratio in children with autism spectrum disorder and below-average intelligence},
journal = {Molecular Autism},
year = {2022},
volume = {13},
publisher = {Springer Nature},
month = {may},
url = {https://doi.org/10.1186%2Fs13229-022-00498-2},
number = {1},
doi = {10.1186/s13229-022-00498-2}
}