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.
"The Trail Making Test (TMT) is one of the commonly used tests for assessment of attention shifting because of its high sensitivity to the presence of cognitive impairment in minor stress and trauma.15 Motor speed and agility have been found to make a strong contribution to success on TMT.16 Actually, Rutherford et al.17 estimated athlete executive function and attention using WCST and Trail Making Test A/B in soccer athletes. Pineda and Merchan18 also reported that WCST and TMT A/B were useful methods to assess executive function which had multiple dimensions and different cognitive operations for anticipation, goal selection, organization, planning, monitoring, shifting, controlling time, and speed, and using environmental feedback. "
[Show abstract][Hide abstract] ABSTRACT: The purpose of this study was to compare cognitive flexibility abilities, stress, and anxiety between starters and non-starter athletes.
A total of 30 male professional-soccer and 40 professional-baseball athletes were recruited. Wisconsin Card Sorting Test (WCST) and Trail Making Test A & B (TMT A & B) were administered to assess cognitive flexibility during competition. The Korean version of the STAI form Y (STAI-KY) and Visual analogue scale for anxiety and stress were used to assess the anxiety and stress.
The starter group had better cognitive function (fewer perseverative errors and rapid TMTB times) (Z=3.32, p<0.01; Z=2.20, p=0.03, respectively) and lower stress and anxiety (F=4.34, p=0.01; F=6.61, p<0.01, respectively) during competition than the non-starter group.
The better cognitive performances were negatively correlated with stress and anxiety. Current results suggested that cognitive flexibility would enhance human performance by modulation of the anxiety and stress during competition.
"Le statut des fonctions exécutives dans la détermination du comportement est à revoir en fonction de ces résultats. Plusieurs travaux ont décrit des dysfonctionnements exécutifs chez les sportifs commotionnés (Collins et al., 1999 ; Echemendia et al., 2001 ; Koh et al., 2003 ; Rutherford et al. 2005). Aucun de ces auteurs ne s'est demandé si les déficits observés sont secondaires à la commotion ou secondaires et préludes à la commotion. "
[Show abstract][Hide abstract] 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.
"Previous research on concussed athletes has shown that complex motor functions require a longer recovery period than cognitive tasks   . It has also been suggested that participation in contact sports may have a negative effect on cognitive function without the existence of a medically diagnosed concussion . However , little data are available that compare concussed and non-concussed athletes and non-athletes on complex neuromotor tasks. "
[Show abstract][Hide abstract] 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.
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