The GCS is determined by taking the best response in each category and totaling them; it ranges from –
**Core Concept**
The **Glasgow Coma Scale (GCS)** is a neurological scale used to assess the level of consciousness in patients, particularly after head injuries. It evaluates three aspects of a patient's behavior: eye opening, verbal response, and motor response.
**Why the Correct Answer is Right**
The GCS is calculated by adding the scores of the three categories, with scores ranging from 3 to 15. The lowest score indicates a deeper coma or a worse neurological status. The scale is widely used in medical settings to monitor the patient's progress and to predict outcomes.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect as the GCS range does not start from 1.
**Option B:** This option is also incorrect because, although part of the range, it does not encompass the full range of the GCS.
**Option D:** This option is incorrect as the GCS does not extend beyond 15.
**Clinical Pearl / High-Yield Fact**
The GCS is a crucial tool in neurology and emergency medicine, allowing healthcare providers to quickly assess and communicate a patient's neurological status. A score of 3 indicates the worst possible outcome, while a score of 15 is normal.
**Correct Answer:** C. 3 to 15.