TY  - JOUR
T1  - SPorts-related recurrent brain injuries— united states
Y1  - 1997/04/16
N1  - 10.1001/jama.1997.03540390020009
JO  - JAMA
SP  - 1190
EP  - 1191
VL  - 277
IS  - 15
N2  - AN ESTIMATED 300000 sports-related traumatic brain injuries (TBIs) of mild to moderate severity,1 most of which can be classified as concussions (i.e., conditions of temporarily altered mental status as a result of head trauma), occur in the United States each year. The proportion of these concussions that are repeat injuries is unknown; however, there is an increased risk for subsequent TBI among persons who have had at least one previous TBI.2,3 Repeated mild brain injuries occurring over an extended period (i.e., months or years) can result in cumulative neurologic and cognitive deficits,4,5 but repeated mild brain injuries occurring within a short period (i.e., hours, days, or weeks) can be catastrophic or fatal. The latter phenomenon, termed "second impact syndrome," has been reported more frequently since it was first characterized in 1984.6-8This report describes two cases of second impact syndrome and presents recommendations developed
SN  - 0098-7484
M3  - doi: 10.1001/jama.1997.03540390020009
UR  - http://dx.doi.org/10.1001/jama.1997.03540390020009
ER  -