A John Lachman Society Publication Volume 2 Spring 2007 Temple University Journal of Orthopaedic Surgery & Sports Medicine

The Relationship Between Concussion History and Post-Concussion Neuropsychological Performance and Symptoms in Collegiate Athletes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101 Tracey Covassin, David Stearne Gender Differences on Neuromuscular Control of the Hip: Implications for Knee Joint Stability and Non-Contact Anterior Cruciate Ligament Injury . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102 David Stearne, Michael Sitler, Ryan Tierney, Tracey Covassin, Keith Davis, Ann Barr, Joseph Torg, Zebulon Kendrick Temple University Journal of Orthopaedic Surgery & Sports Medicine, Spring 2007 iii Gender Differences in Head Acceleration During Soccer Heading Wearing Soccer Headgear . . . . . . . . . . . . . 104 Ryan Tierney, Michael Higgins, Shane Caswell, Jessica Brady, Krista McHardy, Jeff Driban, Kurosh Darvish Effect of Plyometric Neck Muscle Training on Head-Neck Segment Kinematics and Dynamic Stabilization During Soccer Heading: A Pilot Study. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106 Kerry Wilbar, Kris Foulke, Ryan Tierney, Jeff Driban, Michael Higgins, Sarah Shultz Functional and Radiographic Results Following Radial Head Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108 Victor Hsu, Joseph Thoder Performance Analysis and Morphology of Unused Versus Reprocessed Drill Bits . . . . . . . . . . . . . . . . . . . . . . . 109 Saqib Rehman, Kurosh Darvish, Mehdi Shafi eian, Kristofer Matullo, William DeLong