The McGill Grading System for athletic head injury emphasizes the milder forms of injury which might be missed by other grading systems. It was developed at McGill University in Montreal.
loss of consciousness or post-traumatic amnesia
other symptoms
Grade
neither
confusion for only a few seconds; no postconcussion symptoms
1A
neither
confusion AND postconcussion symptoms resolved <= 15 minutes
1B
neither
confusion OR postconcussion symptoms lasting > 15 minutes
1C
amnesia < 30 minutes OR loss of consciousness < 5 minutes
2
amnesia >= 30 minutes AND loss of consciousness >= 5 minutes
3
where:
• Post-concussion symptoms (Maddocks, page 33) include headache, dizziness, blurred or double vision, and nausea.
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