## Components of the Glasgow Coma Scale **Key Point:** The GCS comprises three components, each with a different maximum score. Motor Response has the highest maximum (6), followed by Verbal Response (5) and Eye Opening (4). ### GCS Component Breakdown | Component | Maximum Score | Minimum Score | Total Range | | --- | --- | --- | --- | | Eye Opening (E) | 4 | 1 | 1–4 | | Verbal Response (V) | 5 | 1 | 1–5 | | Motor Response (M) | 6 | 1 | 1–6 | | **Total GCS** | **15** | **3** | **3–15** | **High-Yield:** Motor Response is the most sensitive component for detecting deterioration in consciousness. It is scored from 1 (no response) to 6 (obeys commands), and changes in motor score often precede changes in other components. **Clinical Pearl:** Pupillary reactivity is NOT part of the GCS; it is assessed separately as part of the neurological examination. Fixed, dilated pupils suggest severe brainstem injury or herniation but do not contribute to the GCS score. **Mnemonic:** **E-V-M = 4-5-6** — Eye (4), Verbal (5), Motor (6). The Motor component has the highest score because it is the most discriminatory for assessing level of consciousness. 
Sign up free to access AI-powered MCQ practice with detailed explanations and adaptive learning.