Stroke

National Institutes of Health Stroke Scale (NIHSS)

1a. Level of consciousness

0 = Alert and responsive
1 = Arousable to minor stimulation
2 = Arousable only to painful stimulation
3 = Unarousable or reflex responses

1b. Questions
Ask patient's age and month. Must be exact.

0 = Both correct
1 = One correct
2 = Neither correct

1c. Commands
Ask patient to open/close eyes, grip and release non-paretic hand.

0 = Both correct
1 = One correct
2 = Neither correct

2. Best gaze
Horizontal extraocular movements by voluntary or reflexive (oculocephalic maneuver) testing.

0 = Normal
1 = Partial gaze palsy; abnormal gaze in one or both eyes
2 = Forced eye deviation or total paresis which cannot be overcome by oculocephalic maneuver

3. Visual fields
Test by confrontation or threat as appropriate. If monocular, score field of good eye.

0 = No visual loss
1 = Partial hemianopia, quadrantanopia, extinction
2 = Complete hemianopia
3 = Bilateral hemianopia or blindness

4. Facial palsy
If stuporous, check symmetry of grimace to pain. Paralysis (lower face).

0 = Normal
1 = Minor paralysis (normal looking face, asymmetric smile)
2 = Partial paralysis
3 = Complete paralysis (upper and lower face)

5a. Left motor arm
5b. Right motor arm
Arms outstretched 90° (if patient is sitting) or 45° (if supine) for 10 seconds. Encourage best effort, note paretic side.

0 = No drift
1 = Drift but does not hit bed
2 = Some antigravity effort, but cannot sustain
3 = No antigravity effort, but minimal movement present
4 = No movement at all
X = Unable to assess due to amputation, fusion, etc

6a. Left motor leg
6b. Right motor leg
Raise leg to 30° (always test patient supine) for 5 seconds.

7. Limb ataxia
Check finger-nose-finger; heel-shin; score only if out of proportion to weakness.

0 = No ataxia (or aphasic, hemiplegic)
1 = Ataxia present in one limb
2 = Ataxia present in two limbs
X = Unable to assess as above

8. Sensory
Use safety pin. Check grimace or withdrawal if stuporous. Score only stroke related losses.

0 = Normal
1 = Mild to moderate unilateral sensory loss but patient aware of touch
2 = Severe to total sensory loss, patient unaware of touch (or bilateral sensory loss or comatose)

9. Best language
Ask patient to describe cookie jar picture, name objects, read sentences. May use repeating, writing, stereognosis.

0 = Normal
1 = Mild-moderate aphasia
2 = Severe aphasia (almost no information exchanged)
3 = Mute, global aphasia, or coma

10. Dysarthria
Ask patient to read or repeat a list of words.

0 = Normal
1 = Mild-moderate dysarthria
2 = Severe, unintelligible or mute
X = Intubation or mechanical barrier

11. Extinction and inattention
Simultaneously touch patient on both hands, show fingers in both visual fields, ask patient to describe deficit, left hand.

0 = Normal, none detected (or severe visual loss with normal cutaneous responses)
1 = Neglects or extinguishes to bilateral simultaneous stimulation in any sensory modality (visual, tactile, auditory, spatial, or personal inattention)
2 = Profound hemi-inattention or extinction in more than one modality

Source: UpToDate: Adapted from: Goldstein LB, Samsa GP, Stroke 1997; 28:307.