How hard do you have to be hit to sustain a concussion? — Dr. Mark Heisig

How hard do you have to be hit to sustain a concussion? This will come as a shock to no one: You must be hit very hard to sustain a concussion; not just any bump will do. 

What is a grade 2 concussion? — Dr. Mark Heisig

Complete Concussion Management (@completeconcussions) • Instagram photos and videos

Sleeping After Concussion

Treating Chronic Pain: Reasons to Use a Top-Down System – Naturopathic Doctor News and Review

Why can't you sleep with a concussion? — Dr. Mark Heisig

Proteome Profiler Mouse Cytokine Array Kit, Panel A (ARY006): R&D Systems

In Support of a Citizen's Complaint - HolySmoke.org

Hesign Kanji 3007 PDF, PDF, Kanji

Heimlich's Maneuver, Cleveland