<prompt> Prognostic factor in head injury -Age of patientGlasgow coma scaleMode of injuryPresence of facial trauma  <response>: Ans. is b i.e., Glasgow coma scale Harrison writes- In severe head injury, eye opening, the best motor response of the limbs, and verbal output have been found to be roughly predictive of outcome; these are summarized using the Glasgow coma scale. Glasgow coma scale is used to determine the conscious level of the patient.A Eye openingB Verbal responseC Motor responseSpontaneous - 4Oriented - 5Obeys commands - 6To Voice - 3Confused - 4Localises pain - 5To pain - 2Inappropriate word - 3Withdraws pain - 4None - 1Incomprehensible sound - 2Flexion pain - 3 None - 1Extension pain - 2 None - 1o Ranges from 3 to 15o A score of 7 or less is classed as comao A score of 9 or more excludes coma 