In this episode, we explore the connections between Autism and Parkinson's, focusing particularly on the basal ganglia and its substructures, notably the substantia nigra within the midbrain. We discuss how the substantia nigra, known for its high concentration of neuromelanin, plays a critical role in these disorders. The episode examines how neuromelanin, a dark pigment, not only absorbs all frequencies of light but also has antioxidant properties, binds metals, and acts as a neuroprotector. This discussion leads into the broader implications of environmental signals, particularly light, on human biology, touching on how modern changes in light exposure might affect these conditions.

We examine the role of tyrosine in the synthesis of neuromelanin and its derivatives like dopamine, which are crucial for neural function. We look at how def ...