Sagittal (left) and axial (right) anatomical images illustrating the placement of a single voxel (2 × 2 × 3cm) in the anterior cingulate cortex of a healthy subject, and the associated 1H spectrum (below). Abbreviations: tCr, total creatine; Gln/Glu, glutamine/glutamate; mI, myo-inositol; tCho, total choline; GABA, gamma amino butyric acid; Glu, glutamate; NAA, N-acetylaspartate.