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Chemical signaling between neurons is mediated by neurotransmitters, neuropeptides, hormones, neuromodulators, and many other types of signaling molecules. Many neurological diseases arise due to an imbalance in the brain's neurochemistry. For example, in Parkinson's Disease, there is an imbalance in the brain's level of dopamine.
An opiate, in classical pharmacology, is a substance derived from opium. In more modern usage, the term opioid is used to designate all substances, both natural and synthetic, that bind to opioid receptors in the brain (including antagonists). Opiates are alkaloid compounds naturally found in the Papaver somniferum plant (opium poppy).
Neurotrophic factors are biomolecules – nearly all of which are peptides or small proteins – that support the growth, survival, and differentiation of both developing and mature neurons. [2] [3] [4] Examples of notable neurotrophic factors include: Insulin-like growth factor-1 (IGF-1) Glial cell line-derived neurotrophic factor (GDNF)
In the subsequent autopsy, Bartholow noted that some brain damage had occurred due to the electrodes but that she had died due to the cancer. Bartholow was criticized by fellow physicians and the American Medical Association formally condemned his experiments as he had caused direct harm to the patient, not in an attempt to treat her, but solely to gain knowledge.
These medications are typically made of synthetic chemical compounds and are usually prescribed in psychiatric settings, potentially involuntarily during commitment. Since the mid-20th century, such medications have been leading treatments for a broad range of mental disorders and have decreased the need for long-term hospitalization, thereby ...
In the same period, the US Army undertook the secret Edgewood Arsenal human experiments which grew out of the U.S. chemical warfare program and involved studies of several hundred volunteer test subjects. Britain was also investigating the possible use of LSD and the chemical BZ (3-quinuclidinyl benzilate) as nonlethal battlefield drug-weapons. [1]
This was once the preferred method of production by motorcycle gangs in California, [100] until DEA restrictions on the chemicals made the process difficult. Pseudoephedrine, ephedrine, phenylacetone, and phenylacetic acid are currently DEA list I, and acetic anhydride is list II on the DEA list of chemicals subject to regulation and control ...
A psychoactive drug, mind-altering drug, or consciousness-altering drug is a chemical substance that changes brain function and results in alterations in perception, mood, consciousness, cognition, or behavior. [1] The term psychotropic drug is often used interchangeably, while some sources present narrower definitions.