A conscious sedation system and a response testing apparatus for a conscious sedation system. A controller generates a request for a predetermined hand motion response from a patient and analyses at least a hand motion response made by the patient to the request to determine a level of sedation of the patient. The response testing apparatus includes a request assembly and a response assembly. The request assembly communicates to the patient the request generated by the controller. The response assembly senses the hand motion response and communicates the hand motion response to the controller.