Deep brain stimulation is becoming very precise. This technique allows surgeons to place electrodes in almost any area of the brain, and turn them up or down -- like a radio dial or thermostat -- to correct dysfunction. Andres Lozano offers a dramatic look at emerging techniques, in which a woman with Parkinson's instantly stops shaking and brain areas eroded by Alzheimer's are brought back to life.

Andres Lozano: Parkinson's, depression and the switch that might turn them off

Parkinson's, depression and the switch that might turn them off

DBS not only modifies symptoms but may also ignite the brain's repair mechanisms, opening new paths for neurological therapy.

Deep brain stimulation adjusts brain circuits, instantly easing Parkinson's symptoms and reviving Alzheimer's functions.

Revolutionary electrode therapy can suppress or enhance brain functions, offering new hope for treating severe neurological disorders.