Original sentence: Convulsive therapy attempts to produce this state artificially and under controlled conditions, on the premise that seizures can induce improvement in the patient's mental state once the patient recovers.Convulsive therapy is the deliberate and controlled induction of a seizure or other disturbance of brain function for the purpose of psychiatric treatment.The mechanism of action by which convulsive therapies might exert any lasting effect is unknown.Various types of convulsive therapy were common until the mid or late 20th century
Edited sentence: -- Removed as this has nothing to do with mechanism and is irrelevant to an article on shock therapy.However, the long-term efficacy of ECT is unclear and relatively unstudied, and the procedure is associated with memory loss and other adverse effects.It does not involve the state of medical shock, which is a state in which the tissues do not get adequate oxygen supply, as in severe bleeding, poor cardiac function, or anaphylaxis.Most ECT patients have memory loss related only to the time covering the course of treatment.People wanting to know the side effects can get them from the ECT article.Shock therapy attempts to produce this state artificially and under controlled conditions, on the premise that states of shock can induce improvement in the patient's mental state once the patient recovers.Shock therapy is the deliberate and controlled induction of a seizure or other disturbance of brain function for the purpose of psychiatric treatment.Some memory of this period is usually recovered by a majority of ECT patients.The mechanism of action by which shock therapies might exert any lasting effect is unknown.Various types of shock therapy were common until the mid or late 20th century