Neurochemistry
Neurochemistry, or brain chemistry, was a medical science that dealt with the chemical makeup of an organic brain.

The breakdown of neurochemical molecules during transport was the cause of Transporter psychosis. ()

In 2154 Phlox routinely monitored Jonathan Archer's neurochemistry, while Archer was in stasis. ()

In 2364 the effects of his time experiments affected Paul Manheim's neurochemistry, eventually contributing to his death. ()

In 2370 Data stated, that while the Human brain could be described as cellular functions and neurochemical interactions, this could not explain Human consciousness. ()

By the same year advancements in neurochemistry enabled Julian Bashir to successfully utilize neuromuscular adaptation. ()

In 2372, after Lieutenant Commander Tuvok conducted a mind meld with Ensign Lon Suder, The Doctor diagnosed him with a neurochemical imbalance in his mesiofrontal cortex, causing his erratic, violent behavior. ()

In 2373, after forcefully attempting to telepathically mate with Lt. jg B'Elanna Torres, Ensign Vorik was diagnosed with a neurochemical imbalance by The Doctor. The Doctor understood this meant Vorik was entering into pon farr. ()

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Medicine