Table 5 Studies examining magnetic resonance spectroscopy (MRS)

From: Brain structure, function, and neurochemistry in schizophrenia and bipolar disorder—a systematic review of the magnetic resonance neuroimaging literature

Author

Year

n (HC/SZ/ SAD/ BD)

Bipolar subtype

Illness duration

Medication status

Area of interest

MRS

Sequence

Tesla

Main findings

Molina et al. 95

2007

10/11/0/13

P/NP

Chronic

Medicated

DLPFC

SV

PRESS

1.5

NAA/Cr decreased in SZ and BD No abnormalities in Cho/Cr in either group compared to HC

Crespo et al. 97

2008

15/14/0/17

NP

Chronic

Medicated

dACC

SV

PRESS

1.5

NAA/Cho SZ < HC and BD; Cho/Cr SZ > HC and BD; NAA/Cr no group differences

Ongur et al. 98

2009

22/8/7/15

P

Chronic

Medicated

ACC/POC

SV

PRESS

4

Cr HC = BD > SZ in both voxels

Ongur et al. 143

2010

20/15/0/15

P

Chronic

Medicated

ACC/ POC

SV

PRESS

4

Numerically shortened T2 relaxation times in BD and SZ

Kalayci et al. 96

2012

15/15/15/15

 

Chronic

Medicated

DLPFC

SV

PRESS

1.5

NAA HC > BD, SZ, SAD; Cho HC > BD, SAD; Cr C > BD, SAD, SZ

Atagun et al. 99

2015

30/30/0/28

 

Chronic

Medicated

Heschl’s gyrus

SV

PRESS

3

Glu, NAA, and Cr HC > BD in left hemisphere; no group differences in right hemisphere

Atagun et al. 100

2016

30/25/0/48

 

Chronic

Medicated

Perisylvian structures

SV

MEGA-PRESS

3

GABA SZ > BD = HC

  1. HC healthy control, BD, bipolar disorder, SZ schizophrenia, SAD schizoaffective disorder, P psychotic bipolar disorder, NP non-psychotic bipolar disorder, DLPFC dorsolateral prefrontal cortex, ACC anterior cingulate cortex, dACC dorsal anterior cingulate cortex, POC parieto-occipital cortex, SV single voxel, PRESS point resolved spectroscopy sequence, NAA N-acetyl-aspartate, Cr creatine, Cho choline, Glu glutamate, GABA gamma-aminobutyric acid