YOUNG MAY DEVELOP POST-CONCUSSION ISSUES

LONDON — About onethird of young people who have a concussion develop mental health problems follow their injury, largescale research has found. This includes 37 per cent who experience withdrawal, anxiety, depression or post-traumatic stress and 20 per cent who develop behaviours such as aggression, hyperactivity, disruptive conduct and inability to control anger. Although most recover in less than a month from common effects of a concussion — headache, nausea, dizziness or fatigue — the researchers said mental health symptoms generally take longer to resolve, often persisting for three to six months and sometimes several years. The findings, published in the British Journal of Sports Medicine, come from the researchers' review of data from 69 studies, involving 89,114 young people (age 18 and under). A concussion is sometimes described as a mild traumatic brain injury while not always life-threatening, it can have serious effects.