Which intravenous anesthetic is known for producing 'dissociative anesthesia' and is an antagonist at the NMDA receptor?
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Correct answer: Ketamine
Ketamine blocks the NMDA receptor, leading to a state where the patient appears awake but is unconscious and insensitive to pain. It is unique among anesthetics for its ability to provide significant analgesia and stimulate the cardiovascular system.
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