National Institutes of Health Stroke ScaleItem TestedTitle/DomainResponse/ScoreLOC exhibits level of consciousness. 1ALOC0Alert1Drowsy2Obtunded3Coma/unresponsive1BOrientation0Answers both correctly1Answers 1 correctly2Answers none correctly1CResponse/instructions 20Performs both correctly1Performs 1 correctly2Performs none correctly2Gaze0Normal horizontal movements1Partial palsy2Complete gaze palsy3Visual fields0No field of vision defect1Partial hemianopia2Complete hemianopia3Bilateral hemianopia4Facial movement0Normal1Minor facial weakness2Partial facial weakness3Complete unilateral palsy5Motor function arm0No drifta. Left1Drift before 5 secondsb. Right2Falls before 10 seconds3No effort towards gravity4No movement6Motor role leg0No drifta. Left1Drift before 5 secondsb. Right2Falls before 10 seconds3No effort in opposition t gravity4No movement7Limb ataxia0No ataxia1Ataxia in 1 limb2Ataxia in 2 limbs8Sensory0No sensory loss1Mild sensory loss2Severe sensory loss9Best language0Normal1Mild aphasia2Severe aphasia3Mute or global aphasia10Articulation0NormalDysarthria1Mild dysarthria2Severe dysarthria11Extinction or inattention0Absent1Mild lack of 1 sensory modality2Severe lack of 2 modalitiesTotal NIHSS score: 042Various conditions that mimic stroke need to be ruled out instantly when stroke is suspected.