Calculates the NIH Stroke Scale (NIHSS) neurological deficit score (0–42) across 11 items: level of consciousness (0–3), gaze (0–2), visual fields (0–3), facial palsy (0–3), arm motor (0–4 each), leg motor (0–4 each), limb ataxia (0–2), sensory (0–2), language/aphasia (0–3), dysarthria (0–2), extinction/inattention (0–2). Guides thrombolysis eligibility and outcomes prediction.
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