Definition
The term 'locus niger' is an outdated term for the substantia nigra, a crucial brain area in the midbrain that produces dopamine, a key neurotransmitter. While not currently in use, it is a historical term. It's like calling a smartphone a 'pocket computer'โaccurate once, but not now. The substantia nigra helps regulate movement, and damage can cause Parkinson's. Think of it as mission control for your limbs, keeping everything smooth. Modern textbooks now use 'substantia nigra'.