<prompt> Which of the following is used to measure the depth of anesthesia -Bispectral indexImmobility of patientMAC of anesthetic drugNone  <response>: Ans. is a i.e., Bispectral index Methods of monitoring the depth of anesthesia Monitoring of depth of anesthesia is done mainly clinically1. Bispectal index2. Tachycardia3. Hypertension4. Lacrimation5. Perspiration sweating6. Eye movement7. Preserved reflexes coughing8. Movement on painful stimuli9. Laryngospasm Bronchospasm10. Tachypnea11. P waves on EEG12. Evoked responses 