Patients with a history and/or symptoms of head trauma cared for in the Akron Children's Hospital Sports Medicine Clinic will be invited to participate in this study. Study participants will receive HS-1000 ICP readings for a continuous 16 minute interval in a 30 degree supine position. Recordings will be obtained in one session. When possible, these recordings will be obtained at their initial examination and all follow-up visits. Sports Medicine staff will coordinate the HS-1000 device earplug insertion and recordings so as not to interfere with, nor marginally delay the patient's normal, routine clinical evaluation.