Figure 1 (IMAGE) Institute for Basic Science Caption Reactive astrocytes in SNpc produce excessive GABA via MAO-B in animal models of PD. Aberrant tonic inhibition of dopaminergic neurons causes reduced dopamine production in neurons and motor deficits. The Parkinsonian motor deficits and reduced dopamine production can be recovered by MAO-B inhibition or optogenetic activation of SNpc neurons. Credit IBS Usage Restrictions Please indicate the credit. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.