PH
Anyone who has undergone any kind of surgery has had an encounter with anesthesia. It is, after all, the phenomenon that has allowed such invasions of the body to be far less painful than they were in the past. However, despite how common anesthesia is in medical practice - used throughout the world many thousands of times each and every day - there has yet to be a scientific consensus on why it works.
For some time, it was believed the process affected the fatty parts of the brain, interrupting neural activity there. It’s now believed certain receptors in the brain attach themselves to the anesthetic, which leads to a loss of sensation and consciousness. Moreover, scientists increasingly speculate there may be a variety of processes at work, rather than one simple idea that would explain all the others.
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