Neuropsychological impairment as a consequence of football (soccer) play and football heading: preliminary analyses and report on university footballers.
ABSTRACT Previous research has claimed neuropsychological impairment occurs as a result of professional and amateur football play, and, specifically, football heading. However, much of this research exhibits substantial methodological problems. By investigating less committed amateur level footballers, the current study sought to gain some insight into the developmental history of any neuropsychological consequences of football play. University football, rugby and noncontact sports players were compared on a range of biographical and neuropsychological test variables. While playing their chosen sports, rugby players sustained many more head injuries than footballers and noncontact sportsmen, but footballers did not sustain significantly more head injuries than noncontact sportsmen. The number of head injuries sustained predicted Trails B and TAP Divided Attention latencies in a positive fashion. After controlling for the number of head injuries sustained, sport group effects were detected with TAP Divided Attention accuracy scores, with footballers exhibiting poorest performance. After controlling for the number of head injuries sustained, the total amount of heading done by footballers predicted the number of Wisconsin Card Sorting category shifts in a negative fashion. Nevertheless, over interpretation of all of these results should be resisted because of the exploratory nature of the analyses and the possibility that the sport groups may differ in ways other than just the nature of their sports activities.
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ABSTRACT: La psychométrie classique utilise des indices de liaisons entre variables qui sont symétriques. Par exemple, la corrélation entre a et b sera la même que celle entre b et a. Ou bien, dans une analyse de régression multiple, chacune des variables peut prendre indifféremment le statut de variable expliquée ou de variable explicative. Il en résulte l’impossibilité de déterminer si c’est a qui implique b ou l’inverse : un lien symétrique ne peut pas être un lien de causalité. Il est impossible d’ordonner des corrélations entre variables en séquence implicative. Pour atteindre cet objectif il convient de faire appel à des indices de liaisons qui ne soient pas symétriques. L’analyse implicative des données offre une possibilité d’atteindre cet objectif d’ordonnancement séquentiel des variables. Dans ce chapitre, nous présenterons un exemple de recours à ce type d’analyse pour comparer des groupes contrastés.Analyse Statitique Implicative. Une méthode d'analyse de données pour la recherche de causalités, . : ., Edited by Régis Gras, 01/2009: chapter Un exemple d'analyse implicative en neuro-psychologie: la comparaison de groupes contrastés: pages 387-403; Toulouse : Cépaduès-Editions.
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ABSTRACT: Current literature provides only limited information regarding performance on dynamic motor tasks following concussion. However, recent investigations have suggested that participation in contact sports may have a negative effect on cognitive function without the existence of a medically diagnosed concussion. The purpose of this study was to examine balance control during gait in concussed and uninjured athletes and non-athletes. Twenty-eight Grade 2 concussed individuals (14 athletes and 14 non-athletes) and 28 uninjured matched controls (14 athletes and 14 non-athletes) were assessed for their gait performance within 48 h, 5, 14, and 28 days post-injury under conditions of divided and undivided attention. Athletes, whether concussed or not, walked slower and swayed more and faster than non-athletes. Athletes consistently demonstrated gait imbalance even in the absence of concussion. The findings of this study support the supposition that participation in high-impact sports has a measurable and possibly detrimental effect on balance control in the absence of a medically diagnosed concussion.Medical Engineering & Physics 02/2008; 30(8):959-67. DOI:10.1016/j.medengphy.2007.12.006 · 1.84 Impact Factor
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ABSTRACT: AbstrACt The lack of understanding regarding the symptoms and effects of concussions by athletes and coaches can generate pressure on both the team physicians to diagnose concussions as well as the sport administrators who need to be aware what concussion protocols are being followed. The significance of appropriate diagnosis of a concussion and the return-to-play protocols may be complicated by the number of guidelines available as well as the reliance on the athlete to self-report the symptoms of a concussion. While the grading guidelines have advanced the use of uniform terminology and increased awareness of concussion signs and symptoms, the lack of scientific method in creating the concussion management guidelines called their effectiveness into question. A total of 65 head football athletic trainers were surveyed to determine how medical personnel at selected universities managed the risk of concussions in intercollegiate football. The results indicated that nearly 70% of the respondents indicated that between five to eight football players on their respective teams incurred a concussion during the season. However, no dominant guidelines for assessing a concussion were revealed as none of the guidelines were employed by more than 29% of the population. Finally, 50% did not believe that the same guidelines should be used for an initial concussion assessments or subsequent concussions. Because no two people can be diagnosed in exactly the same way, guidelines may inhibit proper treatment. However, should an error in judgment occur, litigation against the physician, the athletic administrator, and the university may result. Miller, J. J., Wendt, J. T., & Potter, N. (2011). Implications for concussion assessments and return-to-play standards in intercollegiate football: How are the risks managed? Journal of Sport Administration & Supervision 3(1), 91-103. Published online September 2011.