Dopamine Pathway and Substantia Nigra in Parkinson’s Disease - Neuroanatomy Explained #3897992 (License: Personal Use)

The image illustrates a sagittal cross-section of the human brain, focusing on the midbrain’s substantia nigra and its projections to the striatum (comprising the putamen and caudate nucleus) via the nigro-striatal dopamine pathway. In Parkinson’s disease, dopamine neurons in the substantia nigra progressively degenerate, disrupting motor control and leading to hallmark symptoms like bradykinesia, rigidity, and resting tremor. The diagram uses color coding and annotations to clarify anatomical relationships and pathological changes.

Used in medical education, neurology patient resources, or Parkinson’s awareness content; targets users seeking to understand the neurobiological basis of Parkinson’s disease-especially students, clinicians, caregivers, or newly diagnosed patients.