Minimum & Maximum score of GCS are:

   Concept:

• Glasgow Coma Scale is the scoring system used to describe the level of consciousness in a person having a traumatic brain injury. It is used to rule out the level of acute brain injury.
• The minimum score on Glasgow Coma Scale is 3 indicates a deep coma or a brain-dead state. The maximum score is 15 which indicates a fully awake patient. 

Components of the Glasgow Coma Scale

• Eye-opening
• Motor Response
• Verbal Responses

Interpretation

 Patients with  3 to 8 scores are usually considered to be in coma. Generally, brain injury is classified as:

• Severe: GCS < 8–9
• Moderate: GCS 8 or 9–12 
• Minor: GCS ≥ 13.