On the surface it sounds like quack science but apparently it works... The FDA assessed the safety and effectiveness of the Q-Collar through several studies, including a prospective, longitudinal study in the United States with 284 subjects 13 years or older who were participants on a high school football team. During the sports season, 139 athletes wore the Q-Collar and 145 athletes did not. All participants also wore an accelerometer device that measured every impact to the head sustained during play. Each athlete underwent a magnetic resonance imaging (MRI) scan pre-season and post-season. These MRI scans were used to generate Diffusion Tensor Imaging (a specialized MRI image) of the brain that allowed researchers to compare structural changes in the participants' brain, after a season of play. Significant changes were found in deeper tissues of the brain involved in the transmission of electrical nerve signals (white matter regions) in 106 of the 145 (73%) participants in the no-Collar group, while no significant changes in these regions were found in 107 of the 139 (77%) of the group who wore the Q Collar. These differences appear to indicate protection of the brain associated with device use. No significant adverse events were associated with device use.