A level of unconsciousness just above the level of complete surgical anesthesia. The patient does not respond to verbal stimuli but does react to noxious stimuli (e.g., a pinprick). It may be combined with local or regional anesthesia in some forms of surgery.
Partial numbness induced by administering a medication with the aim of decreasing the quantity of inhaled anesthetic required to achieve full anesthesia.
Anesthesia achieved by injecting the anesthetic substance into the lower portion of the spinal canal.