scholarly journals A prospective study of physician-observed concussion during a varsity university hockey season: metabolic changes in ice hockey players. Part 4 of 4

2012 ◽  
Vol 33 (6) ◽  
pp. E4 ◽  
Author(s):  
Emilie Chamard ◽  
Hugo Théoret ◽  
Elaine N. Skopelja ◽  
Lorie A. Forwell ◽  
Andrew M. Johnson ◽  
...  
Keyword(s):  
Prospective Study ◽  
Diffusion Tensor ◽  
Metabolic Changes ◽  
Observer Design ◽  
Ice Hockey ◽  
Future Research ◽  
Prospective Clinical Study ◽  
Head Impacts ◽  
Hockey Players ◽  
A Prospective Study

Object Despite negative neuroimaging findings using traditional neuroimaging methods such as MRI and CT, sports-related concussions have been shown to cause neurometabolic changes in both the acute and subacute phases of head injury. However, no prospective clinical study has used an independent physician-observer design in the monitoring of these changes. The objective of this study was to evaluate the effects of repetitive concussive and sub-concussive head impacts on neurometabolic concentrations in a prospective study of two Canadian Interuniversity Sports (CIS) ice hockey teams using MR spectroscopy (MRS). Methods Forty-five ice hockey players (25 men and 20 women) participated in this study. All participants underwent pre- and postseason MRI, including spectroscopy imaging, using a 3-T MRI machine. The linear combination model was used to quantify the following ratios: glutamate/creatine-phosphocreatine (Cr), myoinositol/Cr, and N-acetylaspartate (NAA)/Cr. Individuals sustaining a medically diagnosed concussion were sent for MRI at 72 hours, 2 weeks, and 2 months after injury. Results No statistically significant differences were observed between athletes who were diagnosed with a concussion and athletes who were not clinically diagnosed as sustaining a concussion. Although no statistically significant longitudinal metabolic changes were observed among athletes who were diagnosed with a concussion, the results demonstrated a predictable pattern of initial impairment, followed by a gradual return to ratios that were similar to, but lower than, baseline ratios. No significant pre- to postseason changes were demonstrated among men who were not observed to sustain a concussion. However, a substantively significant decrease in the NAA/Cr ratio was noted among the female hockey players (t(13) = 2.58, p = 0.02, η2 = 0.34). Conclusions A key finding in this study, from the standpoint of future research design, is the demonstration of substantively significant metabolic changes among the players who were not diagnosed with a concussion. In addition, it may explain why there are few statistically significant differences demonstrated between players who were diagnosed with a concussion and players who were not diagnosed with a concussion (that is, the potency of the independent variable was diminished by the fact that the group of players not diagnosed with a concussion might be better described as a subgroup of the players who may have sustained a concussion but were not observed and diagnosed with a concussion). This result suggests that definitions of concussion may need to be revisited within sports with high levels of repetitive subconcussive head impacts. Future analysis of these data will examine the relationships between the modes of MRI (diffusion tensor imaging, MRS, and susceptibility-weighted MR imaging) used in this study, along with other more sensitive evaluative techniques. This type of intermodal comparison may improve the identification of concussions that were previously dependent on the unreliable self-reporting of recognized concussion symptomatology by the athlete or on poorly validated neuropsychological tests.

Revisiting the empirical model ‘Phases in the junior-to-senior transition of Swedish ice hockey players’: External validation through focus groups and interviews

2017 ◽  
Vol 12 (6) ◽  
pp. 747-761 ◽  
Author(s):  
Sebastian Pehrson ◽  
Natalia B Stambulova ◽  
Kasper Olsson
Keyword(s):  
Focus Groups ◽  
Empirical Model ◽  
External Validation ◽  
Transition Process ◽  
Transition Phase ◽  
Ice Hockey ◽  
Future Research ◽  
Theoretical Frameworks ◽  
Four Seasons ◽  
Hockey Players

In this study, we continue to explore the junior-to-senior transition process in Swedish ice hockey by validating the empirical model ‘Phases in the junior-to-senior transition of Swedish ice hockey players’ created in our previous study.1 More specifically, we collected opinions and critical reflections of 15 senior professional players and expert coaches about the empirical model as a whole and about the content of each junior-to-senior transition phase and then converted the original empirical model into its validated version. Professional ice hockey players and first league coaches formed three focus groups, while three senior coaches were interviewed individually. All were encouraged to critically reflect on the empirical model. The data from all sources were analysed following guidelines of the thematic (deductive) analysis complemented by quantitative measurements of the participants’ agreement with the content of the empirical model. Results supported the sequence and designations of the junior-to-senior transition phases (i.e. preparation, orientation, adaptation and stabilization), as well as duration of the junior-to-senior transition (i.e. up to four seasons) outlined by the empirical model. We were also able to validate the psychological content (perceived demands, resources, barriers, coping strategies and outcomes) of each transitional phase. Accordingly, five themes were reformulated, 17 new themes were added and some themes were re-ordered during the conversion of the original empirical model into the validated model. To improve the readability of the validated model (from the bottom to the top), we also re-ordered sub-categories describing the psychological content of each junior-to-senior transition phase. We conclude by discussing the validated model in relation to theoretical frameworks and previous research and providing some methodology, future research and practice-oriented reflections addressed to researchers, coaches and sport psychology practitioners.

A Prospective Study of Injuries in NCAA Intercollegiate Ice-Hockey Goaltenders

2010 ◽  
pp. 73-73-11 ◽  
Author(s):  
Robert F. LaPrade ◽  
Coen A. Wijdicks ◽  
Stanislav I. Spiridonov
Keyword(s):  
Prospective Study ◽  
Ice Hockey ◽  
A Prospective Study

scholarly journals Spectrum of acute clinical characteristics of diagnosed concussions in college athletes wearing instrumented helmets

2012 ◽  
Vol 117 (6) ◽  
pp. 1092-1099 ◽  
Author(s):  
Ann-Christine Duhaime ◽  
Jonathan G. Beckwith ◽  
Arthur C. Maerlender ◽  
Thomas W. McAllister ◽  
Joseph J. Crisco ◽  
...  
Keyword(s):  
Collegiate Athletes ◽  
Head Impact ◽  
Ice Hockey ◽  
Future Research ◽  
Impact Event ◽  
Head Impacts ◽  
Presenting Symptoms ◽  
Wide Range ◽  
Impact Events ◽  
Specific Impact

Object Concussive head injuries have received much attention in the medical and public arenas, as concerns have been raised about the potential short- and long-term consequences of injuries sustained in sports and other activities. While many student athletes have required evaluation after concussion, the exact definition of concussion has varied among disciplines and over time. The authors used data gathered as part of a multiinstitutional longitudinal study of the biomechanics of head impacts in helmeted collegiate athletes to characterize what signs, symptoms, and clinical histories were used to designate players as having sustained concussions. Methods Players on 3 college football teams and 4 ice hockey teams (male and female) wore helmets instrumented with Head Impact Telemetry (HIT) technology during practices and games over 2–4 seasons of play. Preseason clinical screening batteries assessed baseline cognition and reported symptoms. If a concussion was diagnosed by the team medical staff, basic descriptive information was collected at presentation, and concussed players were reevaluated serially. The specific symptoms or findings associated with the diagnosis of acute concussion, relation to specific impact events, timing of symptom onset and diagnosis, and recorded biomechanical parameters were analyzed. Results Data were collected from 450 athletes with 486,594 recorded head impacts. Forty-eight separate concussions were diagnosed in 44 individual players. Mental clouding, headache, and dizziness were the most common presenting symptoms. Thirty-one diagnosed cases were associated with an identified impact event; in 17 cases no specific impact event was identified. Onset of symptoms was immediate in 24 players, delayed in 11, and unspecified in 13. In 8 cases the diagnosis was made immediately after a head impact, but in most cases the diagnosis was delayed (median 17 hours). One diagnosed concussion involved a 30-second loss of consciousness; all other players retained alertness. Most diagnoses were based on self-reported symptoms. The mean peak angular and rotational acceleration values for those cases associated with a specific identified impact were 86.1 ± 42.6g (range 16.5–177.9g) and 3620 ± 2166 rad/sec2 (range 183–7589 rad/sec2), respectively. Conclusions Approximately two-thirds of diagnosed concussions were associated with a specific contact event. Half of all players diagnosed with concussions had delayed or unclear timing of onset of symptoms. Most had no externally observed findings. Diagnosis was usually based on a range of self-reported symptoms after a variable delay. Accelerations clustered in the higher percentiles for all impact events, but encompassed a wide range. These data highlight the heterogeneity of criteria for concussion diagnosis, and in this sports context, its heavy reliance on self-reported symptoms. More specific and standardized definitions of clinical and objective correlates of a “concussion spectrum” may be needed in future research efforts, as well as in the clinical diagnostic arena.

Antipsychotic induced metabolic changes & treatment response: A prospective study

2014 ◽  
Vol 11 ◽  
pp. 39-44 ◽  
Author(s):  
Eesha Sharma ◽  
Ganesan Venkatasubramanian ◽  
Shivarama Varambally ◽  
Palanimuthu T. Sivakumar ◽  
Doddaballapur.K. Subbakrishna ◽  
...  
Keyword(s):  
Prospective Study ◽  
Treatment Response ◽  
Metabolic Changes ◽  
A Prospective Study

scholarly journals Epidemiology of injuries in professional ice hockey: a prospective study over seven years

2020 ◽  
Vol 7 (1) ◽  
Author(s):  
Gregory Ornon ◽  
Jean-Luc Ziltener ◽  
Daniel Fritschy ◽  
Jacques Menetrey
Keyword(s):  
Prospective Study ◽  
Medial Collateral Ligament ◽  
Significant Risk ◽  
The Body ◽  
Ice Hockey ◽  
Collateral Ligament ◽  
Time Loss ◽  
Significant Difference ◽  
Ice Hockey Injuries ◽  
A Prospective Study

Abstract Background Ice hockey injuries epidemiology is still poorly understood and very few studies are focused on it, especially about professional players. Methods Our prospective study collected all injuries occurring on ice during practice and games over 7 years (2006–2013) in a professional hockey team playing in the 1st division championship in Switzerland. Results During the 7 seasons, we recorded a total of 525 injuries and 190 injuries with time loss (TL). Mean injuries incidence was 5.93 (95% CI 5.28 to 6.27) injuries/1000 h/player and with time loss 2.14 (95% CI 1.79 to 2.39) injuries/1000 h/player. The lower limb was the most affected part of the body, with a total of 40.4% of all injuries, mostly knee Medial Collateral Ligament tear and muscle adductors/abdominal sprain. For the upper limb, shoulder was the most affected joint with mostly acromioclavicular sprain and shoulder dislocation. Forwards had a significant (p < 0.05) higher risk than defensemen for knee Medial Collateral Ligament (MCL) tear. There was no significant difference in the concussion risk between forwards and defensemen, but defensemen had a significant higher risk (p < 0.05) to have a more severe concussion. Conclusion This study provides a better understanding about professional ice hockey epidemiology, which is still insufficiently researched and understood. We also found some significant risk factors, being a forward for knee MCL tear, being a defensemen for concussion severity. Concussion program prevention seems to be effective but it is crucial to continue the follow up of concussion on long term and expand the surveillance system to all the League.

scholarly journals Sex differences in white matter alterations following repetitive subconcussive head impacts in collegiate ice hockey players

2018 ◽  
Vol 17 ◽  
pp. 642-649 ◽  
Author(s):  
Nico Sollmann ◽  
Paul S. Echlin ◽  
Vivian Schultz ◽  
Petra V. Viher ◽  
Amanda E. Lyall ◽  
...  
Keyword(s):  
Sex Differences ◽  
White Matter ◽  
Ice Hockey ◽  
Head Impacts ◽  
Hockey Players

Preliminary Investigation of Executive Functions in Elite Ice Hockey Players

2016 ◽  
Vol 10 (4) ◽  
pp. 324-335 ◽  
Author(s):  
Tobias Lundgren ◽  
Lennart Högman ◽  
Markus Näslund ◽  
Thomas Parling
Keyword(s):  
Executive Function ◽  
Executive Functions ◽  
Preliminary Investigation ◽  
Ice Hockey ◽  
Future Research ◽  
Hockey Players ◽  
Elite Level ◽  
Trail Making ◽  
Design Fluency ◽  
Sample Score

Elite level ice hockey places high demands on player’s physical and technical attributes as well as on cognitive and executive functions. There is, however, a notable lack of research on these attributes and functions. The present study investigated executive function with selected tests from the D-KEFS test battery among 48 ice hockey players and compared them to a standardized sample. Results show that ice hockey players’ scores were significantly higher on Design Fluency (DF) compared with the standardized sample score. Elite players’ scores were not significantly higher than those of lower-league hockey players. A significant correlation was found between on-ice performance and Trail Making Test (TMT) scores. Exploratory analysis showed that elite-level center forwards scored significantly higher on DF than did players in other positions. Future research should investigate whether assessment of executive function should be taken into account, in addition to physical and technical skills, when scouting for the next ice hockey star.

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