Deep brain stimulation is used to treat Parkinson's disease and several other disorders, but isn't approved by federal regulators for depression because results have been inconsistent
Sarah, who asked not to be fully identified, uses a magnet to download her brain activity from a device that detects when she is becoming depressed and delivers bursts of electrical stimulation at her home on Sept. 21, 2021. Her case raises the possibility the method may help people who don’t respond to other therapies. (Ruth Fremson/The New York Times)
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