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Post-Concussion Syndrome. DSM-IV requires 3 or more symptoms to be present at least 3 months after injury: Anxiety, apathy, depression, dizziness, fatigue, HA, irritability, personality changes, sleep problems ICD-10 dx involves symptoms in 3 or more categories
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Post-Concussion Syndrome • DSM-IV requires 3 or more symptoms to be present at least 3 months after injury: • Anxiety, apathy, depression, dizziness, fatigue, HA, irritability, personality changes, sleep problems • ICD-10 dx involves symptoms in 3 or more categories • Role of anxiety and/or beliefs about injury • Educating the patient about possible symptoms and recovery may decrease risk of PCS
Second Impact Syndrome • Brain swelling resulting from >1 mTBI. • Increased ICP, diffuse swelling, brain herniation. • Second injury may result from a less severe impact. • Often fatal – if not fatal, prognosis may be similar to that of severe TBI. • Other sxs: dilated pupils, LOC, loss of eye mvmt, respiratory failure. • Pediatric and adolescent athletes at greater risk for SIS.
Pediatric Athletes • Age-dependent effects since brain is still developing • Status of sutures, skull development, water content and blood volume of brain, and myelination level • Young brain may not recover as well as older brain – but, may require larger force to become injured • Neck/shoulder musculature – less able to transfer forces • Force of impacts – may be lower • Neurobiological Development • Environmental Considerations – school/learning, social network • Consider more conservative approach
Gender Differences • Differences in LOC with concussion • Broshek et al (2005) found gender differences at follow-up after concussion: • Cognitive changes from baseline performance • Self-reported number of symptoms • Differences still existed after adjusting for helmet use • Hormonal differences may contribute • Neuroprotective or negative effects of estrogen controversial – conflicting evidence in rat models • Other differences: • Blood flow rates, rate of glucose metabolism, neuronal density
Conclusions • LOC should not be used to determine severity of injury • Consider impact of injury on various levels: • Somatic, emotional/behavior, & cognitive • Subjective & objective • Tracking/reassessing sxs over time important • Education important • Sxs of concussion • Recovery/return to sport after concussion • Prevention
References Broshek, DK, Kaushik, T, Freeman, JR, Erlanger, D, Webbe, F, & Barth, JT. “Sex differences in outcome following sports-related concussion.” Journal of Neurosurgery; 2005. 102:856-863. DeLaney, J. “The impact of sports: concussion may affect genders differently.” Today in PT; November 2008:18-20. Garvey, D. “Brief clinical update: when can teens return to sports after a head injury?” UCLA Department of Medicine: 2000. Accessed online February 6, 2009 at http://www.med.ucla.edu/modules/wfsection/article.php?articleid=167 Kirkwood, MW, Yeates, KO, & Wilson, PE. “Pediatric sport-related concussion: a review of the clinical management of an oft-neglected population.” Pediatrics; 2006. 117:1359-1371. “Postconcussion syndrome: why this diagnosis is controversial and what treatments may help.” Harvard Mental Health Letter; 2007. 24(6): 6. Mittenberg, W, Canyock, EM, Condit, D, & Patton, C. “Treatment of post-concussion syndrome following mild head injury.” Journal of Clinical and Experimental Neuropsychology; 2001. 23(6): 829-836. Wood, RL. “Post concussialsyndrom: all in the minds eye!” Journal of Neurology, Neurosurgery, and Psychiatry; 2007. 78(6):552.