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  Relationship of auditory electrophysiological responses to magnetic resonance spectroscopy metabolites in Early Phase Psychosis

Bartolomeo, L., Wright, A., Ma, R., Hummer, T., Francis, M., Visco, A., et al. (2019). Relationship of auditory electrophysiological responses to magnetic resonance spectroscopy metabolites in Early Phase Psychosis. International Journal of Psychophysiology, 145, 15-22. doi:10.1016/j.ijpsycho.2019.05.009.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0007-770D-6 Version Permalink: http://hdl.handle.net/21.11116/0000-0007-770E-5
Genre: Journal Article

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Bartolomeo , LA, Author
Wright, AM1, Author              
Ma, RE, Author
Hummer, TA, Author
Francis , MM, Author
Visco, AC, Author
Mehdiyoun , NF, Author
Bolbecker, AR, Author
Hetrick, WP, Author
Dydak , U, Author
Barnard, J, Author
O'Donnell , BF, Author
Breier, A, Author
Affiliations:
1External Organizations, ou_persistent22              

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 Abstract: Both auditory evoked responses and metabolites measured by magnetic resonance spectroscopy (MRS) are altered in schizophrenia and other psychotic disorders, but the relationship between electrophysiological and metabolic changes are not well characterized. We examined the relation of MRS metabolites to cognitive and electrophysiological measures in individuals during the early phase of psychosis (EPP) and in healthy control subjects. The mismatch negativity (MMN) of the auditory event-related potential to duration deviant tones and the auditory steady response (ASSR) to 40 Hz stimulation were assessed. MRS was used to quantify glutamate+glutamine (Glx), N-Acetylasparate (NAA), creatine (Cre), myo-inositol (Ins) and choline (Cho) at a voxel placed medially in the frontal cortex. MMN amplitude and ASSR power did not differ between groups. The MRS metabolites Glx, Cre and Cho were elevated in the psychosis group. Partial least squares analysis in the patient group indicated that elevated levels of MRS metabolites were associated with reduced MMN amplitude and increased 40 Hz ASSR power. There were no correlations between the neurobiological measures and clinical measures. These data suggest that elevated neurometabolites early in psychosis are accompanied by altered auditory neurotransmission, possibly indicative of a neuroinflammatory or excitotoxic disturbance which disrupts a wide range of metabolic processes in the cortex.

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 Dates: 2019-11
 Publication Status: Published in print
 Pages: -
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 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.1016/j.ijpsycho.2019.05.009
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Title: International Journal of Psychophysiology
  Other : Int. J. Psychophysiol.
Source Genre: Journal
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Publ. Info: Amsterdam : Elsevier
Pages: - Volume / Issue: 145 Sequence Number: - Start / End Page: 15 - 22 Identifier: ISSN: 0167-8760
CoNE: https://pure.mpg.de/cone/journals/resource/954925484686