Quantifying the Magnitude and Longevity of the Effect of Repetitive Head Impacts in Adolescent Soccer Players: Deleterious Effect of Long Headers Extend Beyond a Month.

Autor:	Shamloo F; Department of Psychological Sciences, Purdue University, West Lafayette, Indiana, USA., Kon M; Department of Psychological Sciences, Purdue University, West Lafayette, Indiana, USA.; Navy Center for Applied Research in Artificial Intelligence, Naval Research Laboratory, Washington, DC, USA., Ritter E; University of North Carolina Health, Chapel Hill, North Carolina, USA., Sereno AB; Department of Psychological Sciences, Purdue University, West Lafayette, Indiana, USA.; Department of Neurobiology and Anatomy, McGovern Medical School, University of Texas Health Science Center at Houston, Houston, Texas, USA.; Weldon School of Biomedical Engineering, Purdue University, West Lafayette, Indiana, USA.
Jazyk:	angličtina
Zdroj:	Neurotrauma reports [Neurotrauma Rep] 2023 Apr 21; Vol. 4 (1), pp. 267-275. Date of Electronic Publication: 2023 Apr 21 (Print Publication: 2023).
DOI:	10.1089/neur.2022.0085
Abstrakt:	There is growing interest in the effects of sports-related repetitive head impacts (RHIs) on athletes' cognitive capabilities. This study examines the effect of RHIs in data collected from adolescent athletes to estimate the magnitude and longevity of RHIs on sensorimotor and cognitive performance. A non-linear regression model estimated the longevity of RHI effects by adding a half-life parameter embedded in an exponential decay function. A model estimate of this parameter allows the possibility of RHI effects to attenuate over time and introduces a mechanism to study the cumulative effect of RHIs. The posterior distribution of the half-life parameter associated with short-distance headers (<30 m) is centered around 6 days, whereas the posterior distribution of the half-life parameter associated with long-distance headers extends beyond a month. Additionally, the magnitude of the effect of each short header is around 3 times smaller than that of a long header. The results indicate that, on both tasks, response time (RT) changes after long headers are bigger in magnitude and last longer compared to the effects of short headers. Most important, we demonstrate that deleterious effects of long headers extend beyond 1 month. Although estimates are based on data from a relatively short-duration study with a relatively small sample size, the proposed model provides a mechanism to estimate long-term behavioral slowing from RHIs, which may be helpful to reduce the risk of additional injury. Finally, differences in the longevity of the effects of short and long RHIs may help to explain the large variance found between biomechanical input and clinical outcome in studies of concussion tolerance. Competing Interests: A.B.S. is a named inventor of patents US-9,717,459 (August 1, 2017), US-9,949,693 (April 24, 2018), and US-10849559 (December 1, 2020). A.B.S. is an owner of CogNeuro Solutions LLC. These patents are for systems and methods to achieve accurate timing on capacitance devices such as an iPad. (© Farzin Shamloo et al., 2023; Published by Mary Ann Liebert, Inc.)
Databáze:	MEDLINE
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