It may sound uncomfortably close to One Flew Over The Cuckoo’s Nest, but nevertheless brain surgeons are using lasers to burn away parts of the brain that they believe lead to mental illness, reports Wired:
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A brain surgeon begins an anterior cingulotomy by drilling a small hole into a patient’s skull. The surgeon then inserts a tiny blade, cutting a path through brain tissue, then inserts a probe past sensitive nerves and bundles of blood vessels until it reaches a specific cluster of neural connections, a kind of switchboard linking emotional triggers to cognitive tasks. With the probe in place, the surgeon fires up a laser, burning away tissue until the beam has hollowed out about half a teaspoon of grey matter.
This is the shape of modern psychosurgery: Ablating parts of the brain to treat mental illnesses. Which might remind you of that maligned procedure, the lobotomy.