Abstract
Over the last decade, advances in technology have enabled researchers to evaluate concussion biomechanics through measurement of head impacts sustained during play using two primary methods: (1) laboratory reconstruction of open-field head contact, and (2) instrumented helmets. The purpose of this study was to correlate measures of head kinematics recorded by the Head Impact Telemetry (HIT) System (Simbex, NH) with those obtained from a Hybrid III (HIII) anthropometric headform under conditions that mimicked impacts occurring in the NFL. Linear regression analysis was performed to correlate peak linear acceleration, peak rotational acceleration, Gadd Severity Index (GSI), and Head Injury Criterion (HIC15) obtained from the instrumented helmet and HIII. The average absolute location error between instrumented helmet impact location and the direction of HIII head linear acceleration were also calculated. The HIT System overestimated Hybrid III peak linear acceleration by 0.9% and underestimated peak rotational acceleration by 6.1% for impact sites and velocities previously identified by the NFL as occurring during play. Acceleration measures for all impacts were correlated; however, linear was higher (r 2 = 0.903) than rotational (r 2 = 0.528) primarily due to lower HIT System rotational acceleration estimates at the frontal facemask test site. Severity measures GSI and HIC were also found to be correlated, albeit less than peak linear acceleration, with the overall difference between the two systems being less than 6.1% for either measure. Mean absolute impact location difference between systems was 31.2 ± 46.3° (approximately 0.038 ± 0.050 m), which was less than the diameter of the impactor surface in the test. In instances of severe helmet deflection (2.54–7.62 cm off the head), the instrumented helmet accurately measured impact location but overpredicted all severity metrics recorded by the HIII. Results from this study indicate that measurements from the two methods of study are correlated and provide a link that can be used to better interpret findings from future study using either technology.
Similar content being viewed by others
References
Beckwith, J. G., J. J. Chu, and R. M. Greenwald. Validation of a noninvasive system for measuring head acceleration for use during boxing competition. J. Appl. Biomech. 23(3):238–244, 2007.
Beckwith, J. G., J. J. Chu, J. J. Crisco, T. W. McAllister, S. M. Duma, P. G. Brolinson, and R. M. Greenwald. Severity of head impacts resulting in mild traumatic brain injury. American Society of Biomechanics. State College, PA: Penn State University, p. 1144, 2009.
Beusenberg, M., N. Shewchenko, J. A. Newman, R. de Lange, and H. Cappon. Head, neck, and body coupling in reconstructions of helmeted head impacts. International Research Council on the Biomechanics of Injury. The Isle of Man, United Kingdom, 2001.
Broglio, S. P., B. Schnebel, J. J. Sosnoff, S. Shin, X. Fend, X. He, and J. Zimmerman. Biomechanical properties of concussions in high school football. Med. Sci. Sports Exerc. 42(11):2064–2071, 2010.
Broglio, S. P., J. J. Sosnoff, S. Shin, X. He, C. Alcaraz, and J. Zimmerman. Head impacts during high school football: a biomechanical assessment. J. Athl. Train. 44(4):342–349, 2009.
Brolinson, P. G., S. Manoogian, D. McNeely, M. Goforth, R. M. Greenwald, and S. M. Duma. Analysis of linear head accelerations from collegiate football impacts. Curr. Sports Med. Rep. 5(1):23–28, 2006.
Centers for Disease Control and Prevention (CDC). Report to congress on mild traumatic brain injury in the United States: steps to prevent a serious public health problem. Atlanta, GA: National Center for injury Prevention and Control, 2003, pp. 1–45.
Chu, J., J. G. Beckwith, J. J. Crisco, and R. M. Greenwald. A novel algorithm to measure linear and rotational acceleration using single-axis accelerometers. 5th World Congress of Biomechanics. Munich, Germany. J. Biomech. S534, 2006.
Craig, M. J. Biomechanics of jaw loading in football helmet impacts. Dissertation, Wayne State University, Detroit, MI, 2007.
Crisco, J. J., J. J. Chu, and R. M. Greenwald. An algorithm for estimating acceleration magnitude and impact location using multiple nonorthogonal single-axis accelerometers. J. Biomech. Eng. 126(6):849–854, 2004.
Crisco, J. J., R. Fiore, J. G. Beckwith, J. J. Chu, P. G. Brolinson, S. Duma, T. W. McAllister, A. C. Duhaime, and R. M. Greenwald. Frequency and location of head impact exposures in individual collegiate football players. J. Athl. Train. 45(6):549–559, 2010.
Crisco, J. J., B. J. Wilcox, J. G. Beckwith, J. J. Chu, A. C. Duhaime, S. Rowson, S. M. Duma, A. C. Maerlender, T. W. McAllister, and R. M. Greenwald. Head impact exposure in collegiate football players. J. Biomech. Epub ahead of print, 2011.
Crisco, J. J., B. J. Wilcox, J. T. Machan, T. W. McAllister, A. C. Duhaime, S. M. Duma, S. Rowson, J. G. Beckwith, J. J. Chu, and R. M. Greenwald. Head impact severity measures in collegiate football players. J. Appl. Biomech. 2011 (accepted).
Dick, R., M. S. Ferrara, J. Agel, R. Courson, S. W. Marshall, M. J. Hanley, and F. Reifsteck. Descriptive epidemiology of collegiate men’s football injuries: national collegiate athletic association injury surveillance system, 1988–1989 through 2003–2004. J. Athl. Train. 42(2):221–233, 2007.
DiMasi, F. P. [Internet]. Transformation of nine-accelerometer-package (nap) data for replicating headpart kinematics and dynamic loading: Technical report dot hs-808 282. National Highway Traffic Safety Administration; [cited. Available].
Duma, S. M., S. J. Manoogian, W. R. Bussone, P. G. Brolinson, M. W. Goforth, J. J. Donnenwerth, R. M. Greenwald, J. J. Chu, and J. J. Crisco. Analysis of real-time head accelerations in collegiate football players. Clin. J. Sport. Med. 15(1):3–8, 2005.
Duma, S., S. Manoogian, G. Brolinson, M. Goforth, J. Donnenwerth, R. Greenwald, J. Chu, B. Bussone, J. Stitzel, and J. Crisco. Measuring real time head accelerations in collegiate football players. American Society of Biomechanics, 2004.
Funk, J. R., S. M. Duma, S. J. Manoogian, and S. Rowson. Biomechanical risk estimates for mild traumatic brain injury. Annu Proc Assoc Adv Automot Med. 51:343–361, 2007.
Gadd, C. W. Use of a weighted-impulse criterion for estimating injury hazard. 10th Stapp Car Crash Conference. New York. Society of Automotive Engineers, 1966, pp. 164–174.
Greenwald, R. M., J. T. Gwin, J. J. Chu, and J. J. Crisco. Head impact severity measures for evaluating mild traumatic brain injury risk exposure. Neurosurgery 62(4):789–798, 2008.
Guskiewicz, K. M., S. W. Marshall, J. Bailes, M. McCrea, R. C. Cantu, C. Randolph, and B. D. Jordan. Association between recurrent concussion and late-life cognitive impairment in retired professional football players. Neurosurgery 57(4):719–726, 2005.
Guskiewicz, K. M., S. W. Marshall, J. Bailes, M. McCrea, H. P. Harding, Jr, A. Matthews, J. R. Mihalik, and R. C. Cantu. Recurrent concussion and risk of depression in retired professional football players. Med. Sci. Sports Exerc. 39(6):903–909, 2007.
Guskiewicz, K. M., and J. P. Mihalik. Biomechanics of sport concussion: quest for the elusive injury threshold. Exerc. Sport. Sci. Rev. 39(1):4–11, 2011.
Guskiewicz, K. M., J. P. Mihalik, V. Shankar, S. W. Marshall, D. H. Crowell, S. M. Oliaro, M. F. Ciocca, and D. N. Hooker. Measurement of head impacts in collegiate football players: relationship between head impact biomechanics and acute clinical outcome after concussion. Neurosurgery 61(6):1244–1252, 2007.
Gwin, J. T., J. J. Chu, S. G. Diamond, P. D. Halstead, J. J. Crisco, and R. M. Greenwald. An investigation of the nocae linear impactor test method based on in vivo measures of head impact acceleration in American football. J. Biomech. Eng. 132(1):011006, 2010.
Manoogian, S., D. McNeely, S. Duma, G. Brolinson, and R. Greenwald. Head acceleration is less than 10 percent of helmet acceleration in football impacts. Biomed. Sci. Instrum. 42:383–388, 2006.
Mihalik, J. P., D. R. M. Bell, S. W. Marshall, and K. M. Guskiewicz. Measurement of head impacts in collegiate football players: an investigation of positional and event-type differences. Neurosurgery 61(6):1229–1235, 2007.
Moon, D. W., C. W. Beedle, and C. R. Kovacic. Peak head acceleration of athletes during competition—football. Med. Sci. Sports 3(1):44–50, 1971.
National Committee on Standards for Athletic Equipment. Nocsae standard linear impactor test method and equipment used in evaluating the performance characteristics of protective headgear and faceguards. Document #081-04m04 (Proposed Status), 2006, pp. 1–6.
Naunheim, R. S., J. Standeven, C. Richter, and L. M. Lewis. Comparison of impact data in hockey, football, and soccer. J. Trauma 48(5):938–941, 2000.
Newman, J. A., M. C. Beusenberg, N. Shewchenko, C. Withnall, and E. Fournier. Verification of biomechanical methods employed in a comprehensive study of mild traumatic brain injury and the effectiveness of American football helmets. J. Biomech. 38(7):1469–1481, 2005.
Padgaonkar, A. J., K. W. Krieger, and A. I. King. Measurement of angular accelerations of a rigid body using linear accelerometers. J. Appl. Mech. 42(3):552–556, 1975.
Pellman, E. J. Background on the national football league’s research on concussion in professional football. Neurosurgery 53(4):797–798, 2003.
Pellman, E. J., J. W. Powell, D. C. Viano, I. R. Casson, A. M. Tucker, H. Feuer, M. Lovell, J. F. Waeckerle, and D. W. Robertson. Concussion in professional football: Epidemiological features of game injuries and review of the literature—part 3. Neurosurgery 54(1):81–96, 2004.
Pellman, E. J., D. C. Viano, I. R. Casson, C. Arfken, and J. Powell. Concussion in professional football: Injuries involving 7 or more days out—part 5. Neurosurgery 55(5):1100–1119, 2004.
Pellman, E. J., D. C. Viano, I. R. Casson, A. M. Tucker, J. F. Waeckerle, J. W. Powell, and H. Feuer. Concussion in professional football: Repeat injuries—part 4. Neurosurgery 55(4):860–876, 2004.
Pellman, E. J., D. C. Viano, A. M. Tucker, and I. R. Casson. Concussion in professional football: Location and direction of helmet impacts—part 2. Neurosurgery 53(6):1328–1341, 2003.
Pellman, E. J., D. C. Viano, A. M. Tucker, I. R. Casson, and J. F. Waeckerle. Concussion in professional football: Reconstruction of game impacts and injuries. Neurosurgery 53(4):799–814, 2003.
Pellman, E. J., D. C. Viano, C. Withnall, N. Shewchenko, C. A. Bir, and D. Halstead. Concussion in professional football: helmet testing to assess impact performance—part 11. Neurosurgery 58(1):78–96, 2006.
Reid, S., J. A. Tarkington, H. Epstein, and T. O’Dea. Brain tolerance to impact in football. Surg. Gynecol. Obstet. 133(6):929–936, 1971.
Rowson, S., J. G. Beckwith, J. J. Chu, D. S. Leonard, R. M. Greenwald, and S. M. Duma. A six degree of freedom head acceleration measurement device for use in football. J. Appl. Biomech. 27(1):8–14, 2011.
Rowson, S., and S. M. Duma. Development of the star evaluation system for football helmets: integrating player head impact exposure and risk of concussion. Ann. Biomed. Eng. 39(8):2130–2140, 2011.
Rowson, S., S. M. Duma, J. G. Beckwith, J. J. Chu, R. M. Greenwald, J. J. Crisco, P. G. Brolinson, A. C. Duhaime, T. W. McAllister, and A. C. Maerlender. Rotational head kinematics in football impacts: an injury risk function for concussion. Ann. Biomed. Eng., 2011 (in review).
Schnebel, B., J. T. Gwin, S. Anderson, and R. Gatlin. In vivo study of head impacts in football: a comparison of national collegiate athletic association division I versus high school impacts. Neurosurgery 60(3):490–496, 2007.
Versace, J. A review of the severity index. 15th Stapp Car Crash Conference. Warrendale: Society of Automotive Engineers, 1971, pp. 771–796.
Acknowledgments
The authors gratefully acknowledge the funding for this study provided by the National Institutes of Health (R01HD048638). HIT System technology described in this study was developed with support from the National Institutes of Health (R44HD40743 and R01HD048638) and from Riddell, Inc. (Chicago, IL). Helmets and associated hardware were also provided by Riddell, Inc. The study protocol was developed in conjunction with the National Football League’s Committee on Mild Traumatic Brain Injury, which provided funding to Biokinetics to operate the linear impactor. Following data collection at the said facility, data from both systems were mutually exchanged. Additional Contributions: David Viano, as co-chairman of the NFL’s mTBI Committee at the time of this data collection, approved the initial protocol and funding to Biokinetics, but he did not participate in data collection, analysis, or interpretation of the data. At his request, following primary data collection and analysis by Simbex and Biokinetics, impact sites A′ and A′′ were added to the test protocol. These data were collected 7 months after the initial testing. The interpretation of the material presented within this communication is solely that of the authors and not necessarily reflective of the sponsor’s views. The authors would like to thank Mr. Chris Withnall and Mr. Michael Wonnacott from Biokinetics and Associates, Ltd who provided technical expertise when needed and assisted with data collection. In addition, the authors would like to thank Joseph Crisco from Brown University for assisting with data interpretation.
Conflict of Interest
Jonathan Beckwith, Jeffrey Chu and Richard Greenwald, as employees or as beneficial owner of Simbex, have a financial interest in the HIT System technology used in this study.
Author information
Authors and Affiliations
Corresponding author
Additional information
Associate Editor Joel Stitzel oversaw the review of this article.
Rights and permissions
About this article
Cite this article
Beckwith, J.G., Greenwald, R.M. & Chu, J.J. Measuring Head Kinematics in Football: Correlation Between the Head Impact Telemetry System and Hybrid III Headform. Ann Biomed Eng 40, 237–248 (2012). https://doi.org/10.1007/s10439-011-0422-2
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s10439-011-0422-2