SV2A and schizophrenia: Additionally, a study employing PET and 1H‐MRS found that SV2A levels were correlated with local Glu/Cr (glutamate relative to creatine) levels in healthy volunteers within the left hippocampus and anterior cingulate cortex, with diminished or absent correlations in patients with schizophrenia (Onwordi et al. 2021).