A partial or complete loss of sensation, with or without the loss of consciousness; as a result of disease, injury, or the administration of an anesthetic agent; usually by injection or inhalation: "Although anesthesia is used eliminate tactile sensibility, or of any of the other senses, it refers especially to the absence of pain, because it is induced to permit the performance of surgery or other painful procedures."

"Local anesthesia affects a limited area of the body; as opposed to general anesthesia, which impacts the whole body."

The index of anesthesia history, Parts 1, 2, and 3.

1. A local or general anesthesia produced by an electric current.
2. General anesthesia produced by an apparatus that passes electricity of a certain frequency, amplitude, and wave form through the brain.

A state resembling deep sleep.

First, a sedative is given, then an infusion is placed, and a fast acting sleep-inducing agent is injected.

A variety of agents (narcotics) are then administered to maintain this condition of deep sleep for the duration of the operation.

A local or regional anesthesia is used to eliminate pain in specific parts of the body; such as, the area of the surgery.

In local anesthesia, an agent is injected into the actual surgical site; while in regional anesthesia, the anesthetic agent is injected at a distance from the surgical site near the nerve that supplies that particular area.