Electroconvulsive therapy (ECT) refers to a form of therapy used to treat depressed patients, in which brain seizures are created by passing an electric current through the head.

The ECT refers also to biological treatment for severe, chronic depression involving the application of electrical impulses through the brain to produce seizures. The reasons for the Electroconvulsive Therapy's (ECT) effectiveness are unknown.

Other definition:

ECT or Electroconvulsive therapy refers to the treatment for depression that involves the induction of a brain seizure by passing electrical current through the patient's brain while he or she is anesthetized. It is a brief electrical current applied to a patient's temples to alter the brain's chemical and electrical activity

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