GABA-Glut neuron substantia nigra dopaminergic neuron A9 dopaminergic neuron 2025-05-02T09:59:34Z substantia nigra dopaminergic neuron A type of dopaminergic neuron in the substantia nigra involved in motor control and particularly vulnerable in Parkinson’s disease. In mice, it is notable for its heterogeneous co-release of dopamine with either glutamate or GABA. It releases GABA through alternative synthesis pathways or reuptake mechanisms independent of GAD expression. A9 nigral dopamine neuron