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anesthesia
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Also known as: anaesthetic
Written by
Alan William Cuthbert
Sheild Professor of Pharmacology, University of Cambridge.
Alan William Cuthbert,
Floyd E. Bloom
Chairman, Department of Neuropharmacology, Scripps Research Institute, La Jolla, California. Editor in Chief, Science magazine. Coauthor of Biochemical Basis of Neuropharmacology and...
Floyd E. Bloom•All
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Also spelled:
anaesthetic

anesthetic, any agent that produces a local or general loss of sensation, including pain. Anesthetics achieve this effect by acting on the brain or peripheral nervous system to suppress responses to sensory stimulation. The unresponsive state thus induced is known as anesthesia. General anesthesia involves loss of consciousness, usually for the purpose of relieving the pain of surgery. Local anesthesia involves loss of sensation in one area of the body by the blockage of conduction in nerves. General anesthetics induce anesthesia throughout the body and can be administered either by inhalation or by direct injection into the bloodstream. The relationship ...(100 of 2193 words)

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