Cumulative Effects Associated With Recurrent Concussion in Collegiate Football Players: The NCAA Concussion Study
Kevin M. Guskiewicz,Michael McCrea,Michael McCrea,Stephen W. Marshall,Robert C. Cantu,Robert C. Cantu,Christopher Randolph,Christopher Randolph,William B. Barr,James A. Onate,James P. Kelly,James P. Kelly +11 more
TLDR
This study suggests thatPlayers with a history of previous concussions are more likely to have future concussive injuries than those with no history; 1 in 15 players with a concussion may have additional concussions in the same playing season; and previous concussion may be associated with slower recovery of neurological function.Abstract:
ContextApproximately 300 000 sport-related concussions occur annually
in the United States, and the likelihood of serious sequelae may increase
with repeated head injury.ObjectiveTo estimate the incidence of concussion and time to recovery after concussion
in collegiate football players.Design, Setting, and ParticipantsProspective cohort study of 2905 football players from 25 US colleges
were tested at preseason baseline in 1999, 2000, and 2001 on a variety of
measures and followed up prospectively to ascertain concussion occurrence.
Players injured with a concussion were monitored until their concussion symptoms
resolved and were followed up for repeat concussions until completion of their
collegiate football career or until the end of the 2001 football season.Main Outcome MeasuresIncidence of concussion and repeat concusion; type and duration of symptoms
and course of recovery among players who were injured with a concussion during
the seasons.ResultsDuring follow-up of 4251 player-seasons, 184 players (6.3%) had a concussion,
and 12 (6.5%) of these players had a repeat concussion within the same season.
There was an association between reported number of previous concussions and
likelihood of incident concussion. Players reporting a history of 3 or more
previous concussions were 3.0 (95% confidence interval, 1.6-5.6) times more
likely to have an incident concussion than players with no concussion history.
Headache was the most commonly reported symptom at the time of injury (85.2%),
and mean overall symptom duration was 82 hours. Slowed recovery was associated
with a history of multiple previous concussions (30.0% of those with ≥3
previous concussions had symptoms lasting >1 week compared with 14.6% of those
with 1 previous concussion). Of the 12 incident within-season repeat concussions,
11 (91.7%) occurred within 10 days of the first injury, and 9 (75.0%) occurred
within 7 days of the first injury.ConclusionsOur study suggests that players with a history of previous concussions
are more likely to have future concussive injuries than those with no history;
1 in 15 players with a concussion may have additional concussions in the same
playing season; and previous concussions may be associated with slower recovery
of neurological function.read more
Citations
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The sports concussion note : should SCAT become SCOAT?
TL;DR: The experience and suggestions of South African sports physicians in evolving a more comprehensive clinical evaluation tool and record of patient care, the Sports Concussion Office Assessment Tool are described.
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Do self-reported concussions have cumulative or enduring effects on drivers' anticipation of traffic hazards?
TL;DR: The findings suggest that previous concussions do not adversely affect young drivers’ ability to anticipate traffic hazards; however, due to reliance on self-reports of concussion history, further prospective longitudinal research is needed.
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Long-Term Anesthetic-Dependent Hypoactivity after Repetitive Mild Traumatic Brain Injuries in Adolescent Mice
Bridgette D. Semple,Raha Sadjadi,Jaclyn Carlson,Yiran Chen,Duan Xu,Donna M. Ferriero,Linda J. Noble-Haeusslein +6 more
TL;DR: It is suggested that selected anesthetics may confer early neuroprotection after rmTBIs, and as such mask long-term abnormal phenotypes that may otherwise emerge as a consequence of acute pathogenesis.
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Non-disclosure in Irish collegiate student-athletes: do concussion history, knowledge, pressure to play and gender impact concussion reporting?
TL;DR: While gender, concussion knowledge and pressure to play do not seem to impact non-disclosure, a previous history of concussion increases the odds of concussion non- Disclosure by 2.6 times, creating a positive concussion reporting culture in high-risk Irish collegiate sports is critical, particularly for those with a previous medically diagnosed concussion.
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The long-term consequences of repetitive head impacts: Chronic traumatic encephalopathy.
TL;DR: The historical origins of CTE are first presented, followed by a comprehensive description of the neuropathologic and clinical features, emphasizing the importance of diagnosing CTE during life to facilitate development of preventative and intervention strategies.
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Acute Effects and Recovery Time Following Concussion in Collegiate Football Players: The NCAA Concussion Study
Michael McCrea,Kevin M. Guskiewicz,Stephen W. Marshall,William B. Barr,Christopher Randolph,Christopher Randolph,Robert C. Cantu,Robert C. Cantu,James A. Onate,Jingzhen Yang,James P. Kelly +10 more
TL;DR: In this paper, a study of 1631 football players from 15 US colleges found that players with concussions exhibited more severe symptoms (mean GSC score 20.93 [95% confidence interval {CI, 15.65-26.21] points higher than that of controls), cognitive impairments (mean SAC score 2.94 [ 95% CI, 1.41 to 2.06], cognitive functioning improved to baseline levels within 5 to 7 days (day 7 SAC mean difference, −0.33;
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