Matthew A. Gfeller Sport-Related Traumatic Brain Injury Research Center, Department of Exercise and Sport Science, University of North Carolina, 2207 Stallings-Evans Sports Medicine Complex, Campus Box 8700, Chapel Hill, NC 27599-8700, USA.
Ann Biomed Eng. 2012 Jan;40(1):14-22. doi: 10.1007/s10439-011-0421-3. Epub 2011 Oct 13.
Concussions sustained during college and professional football careers have been associated with both acute and chronic neurologic impairment. The contribution of subconcussive impacts to this impairment has not been adequately studied. Therefore, we investigated the relationship between subconcussive impacts and concussion history on clinical measures of neurologic function. Forty-six collegiate football players completed five clinical measures of neurologic function commonly employed in the evaluation of concussion before and after a single season. These tests included the Automated Neuropsychological Assessment Metrics, Sensory Organization Test, Standardized Assessment of Concussion, Balance Error Scoring System, and Graded Symptom Checklist. The Head Impact Telemetry (HIT) System recorded head impact data including the frequency, magnitude, and location of impacts. College football players sustain approximately 1,000 subconcussive impacts to the head over the course of a season, but for the most part, do not demonstrate any clinically meaningful changes from preseason to postseason on measures of neurologic function. Changes in performance were mostly independent of prior concussion history, and the total number, magnitude and location of sustained impacts over one season as observed R(2) values ranged between 0.30 and 0.35. Repetitive subconcussive head impacts over a single season do not appear to result in short-term neurologic impairment, but these relationships should be further investigated for a potential dose-response over a player's career.
大学生和职业足球运动员在比赛中遭受的脑震荡与急性和慢性神经功能障碍都有关系。亚临床冲击对这种损伤的影响尚未得到充分研究。因此，我们研究了亚临床冲击和脑震荡史与神经功能临床测量之间的关系。46 名大学生足球运动员在一个赛季前后完成了五项神经功能的临床测试，这些测试通常用于评估脑震荡。这些测试包括自动化神经心理评估指标、感觉组织测试、标准化脑震荡评估、平衡错误评分系统和分级症状检查表。头部冲击遥测系统（HIT）记录了头部冲击数据，包括冲击的频率、幅度和位置。大学生足球运动员在一个赛季中大约会受到 1000 次亚临床冲击，但大多数情况下，他们在神经功能测量方面，从季前赛到季后赛并没有表现出任何临床上有意义的变化。表现的变化主要与之前的脑震荡史无关，一个赛季中承受的冲击总数、幅度和位置的观察 R² 值在 0.30 到 0.35 之间。一个赛季中反复出现的亚临床头部冲击似乎不会导致短期神经损伤，但这些关系应该在运动员职业生涯中进一步研究潜在的剂量反应。
