Which condition describes a patient who is unconscious and does not respond to stimuli?

The condition that describes a patient who is unconscious and does not respond to stimuli is known as being comatose. In a comatose state, an individual is unable to awaken and does not exhibit purposeful responses to external stimuli, which includes verbal commands, physical stimulation, or any other types of interaction. This state is indicative of severe dysfunction in the brain and can result from various causes such as trauma, metabolic disturbances, or neurological diseases.

In contrast, stupor typically refers to a state of near-unconsciousness where the individual may still have some level of responsiveness but is significantly impaired. Similarly, obtunded describes a condition where the patient has reduced alertness and lethargy, and although they may respond to stimuli, it is often in a diminished capacity and less than normal. Being conscious implies that the patient is fully alert and able to respond appropriately, which is the opposite of the scenario described in the question. Therefore, the term that best fits the description of an unconscious patient who does not respond is indeed comatose.