The Stiff-Person Syndrome: An Autoimmune Disorder Affecting Neurotransmission of γ-Aminobutyric Acid

Figure 3. Placement of selected regions of interest in motor cortex. Placement of selected regions of interest in posterior
occipital cortex. Additional regions of interest in the putamen. Average γ-aminobutyric acid ( ) levels (expressed as ratios
to creatine), obtained by magnetic resonance spectroscopy in unaffected persons, are displayed by using a color scale.
Conventional axial and sagittal magnetic resonance images of an unaffected person's brain. A.B.C.GABA
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Ann Intern Med
October 5, 1999
vol. 131
no. 7
522-530