FrontMatter -- Reviewers -- Acknowledgments -- Contents -- Boxes, Figures, and Tables -- Abbreviations and Acronyms -- Summary -- 1 Introduction -- 2 Neuroscience, Biomechanics, and Risks of Concussion in the Developing Brain -- 3 Concussion Recognition, Diagnosis, and Acute Management -- 4 Treatment and Management of Prolonged Symptoms and Post-Concussion Syndrome -- 5 Consequences of Repetitive Head Impacts and Multiple Concussions -- 6 Protection and Prevention Strategies -- 7 Conclusions and Recommendations -- Appendix A: Public Workshop Agendas -- Appendix B: Biographical Sketches of Committee Members -- Appendix C: Clinical Evaluation Tools.