 Despite the advances that have been made, previous studies discontinued ECoG recordings after a maximum of 7 days. A 7 day recording period is, however, likely inadequate to accurately characterize the total burden of SDs following TBI as previous work demonstrates an early peak period of SDs around 0-2 days post-TBI followed by a relative quiescent period and then a second peak of increased SD frequency around 7 days post-TBI. Therefore, a longer recordings period will provide a better understanding of the natural history of SDs following TBI and allow a more accurate understanding of the physiologic and pathophysiologic factors that influence initiation of these pathologic events. 