Electroconvulsive therapy has been used successfully to treat __________ that has not responded to other treatments.

A) bipolar disorder
B) severe depression
C) schizophrenia
D) obsessive-compulsive disorder

Electroconvulsive Therapy

Electroconvulsive therapy is a medical treatment most commonly used for severe depression, involving the induction of a controlled seizure in the patient through electrical currents.

Severe Depression

A major depressive disorder characterized by intense and persistent feelings of sadness, hopelessness, and a lack of interest or pleasure in most activities.

Bipolar Disorder

A mental condition marked by extreme mood swings, including periods of mania and depression.