Ψ
 Medical Concepts
  Anatomy
 Nervous System
 Central Nervous System
 Brain
 Mesencephalon
 Tegmentum Mesencephali
 Cerebral Aqueduct
 Pedunculopontine Tegmental Nucleus
 Periaqueductal Gray
 Red Nucleus
 Substantia Nigra
 Ventral Tegmental Area

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