Definition
The substantia nigra is a brain structure located in the midbrain that plays a crucial role in movement and reward ๐ง . It's a key component of the basal ganglia, a group of structures involved in motor control. Think of it as the brain's dopamine factory, producing this neurotransmitter that's essential for smooth, coordinated movements. It is also involved in reward-seeking behavior and learning. Its name means 'black substance' because of its dark pigmentation.