Abstract #1708

The effects of repetitive head impact exposure on cerebrovascular reactivity in middle and high-school athletes

Alexander D. Cohen¹, Benjamin L. Brett², Milan D. Patel¹, Kelly D. Ristow¹, Michael A. McCrea², and Yang Wang¹

¹Radiology, Medical College of Wisconsin, Milwaukee, WI, United States, ²Neurosurgery, Medical College of Wisconsin, Milwaukee, WI, United States

Synopsis

Keywords: Traumatic brain injury, fMRI, Cerebrovascular reactivity, Breath hold

Cerebrovascular reactivity (CVR) can provide a marker of vascular injury. The effects of repetitive head impact exposure (RHIE) during contact sports remains to be fully elucidated. We investigated the effect of sport, time, and their interaction on CVR in contact sport (CS) and non-contact sport (NCS) middle school and high school athletes. There was a significant effect of time and a significant interaction effect between contact group and time on CVR with CVR decreasing pre to post season in the NCS group but remaining unchanged in the CS group.

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