<prompt> Regarding Bispectral index monitor all are true exceptMonitors depth of anaesthesiaDecrease the dose of agent once BIS value falls below 40Increase the dose of agent once BIS value falls below 40Increase the dose of agent once BIS value goes beyond 60  <response>: Increasing BIS value suggests regaining consciousness, so need to increase the dose and vice versa Target BIS value 4060. 