substantia nigra[səb stan′s̸hē ə nī′grə]
a layer of dark cells in the midbrain that produce the neurotransmitter dopamine: Parkinson's disease is caused by an inadequate supply of dopamine
A layer of large pigmented nerve cells in the midbrain that produce dopamine and whose destruction is associated with Parkinson's disease.
Origin of substantia nigraNew Latin : Latin substantia, substance + Latin nigra, feminine of niger, black.
(plural substantiae nigrae or substantia nigras)
- A brain structure located in the mesencephalon (midbrain) that plays an important role in reward, addiction, and movement, damage to which occurs in Parkinson's and Parkinsonian patients.
Directly from Latin meaning the black body or substance.