Neurological assessment and its relationship to CSF biomarkers in amateur boxers

Autor: Kaj Blennow, Jan Marcusson, Henrik Zetterberg, Thomas Karlsson, Sanna Neselius, Helena Brisby
Rok vydání: 2014
Předmět:
medicine.medical_specialty
Critical Care and Emergency Medicine
Medicinska och farmaceutiska grundvetenskaper
Traumatic brain injury
lcsh:Medicine
Social Sciences
Audiology
Neuropsychological Tests
Neurofilament Proteins
Neuropsychology
Diagnostic Medicine
Surveys and Questionnaires
Concussion
Medicine and Health Sciences
Medicine
Humans
Psychology
Neuropsychological assessment
Sports and Exercise Medicine
lcsh:Science
Trauma Medicine
Multidisciplinary
medicine.diagnostic_test
business.industry
Diffuse axonal injury
lcsh:R
Klinisk medicin
Cognitive Psychology
Biology and Life Sciences
Basic Medicine
Neuropsychological test
Boxing
medicine.disease
Rey–Osterrieth complex figure
Head Injury
Neurology
Finger tapping
Closed head injury
Physical therapy
Cognitive Science
lcsh:Q
Clinical Medicine
business
human activities
Biomarkers
Research Article
Neuroscience
Zdroj: PLoS ONE
PLoS ONE, Vol 9, Iss 6, p e99870 (2014)
ISSN: 1932-6203
Popis: BACKGROUND: Mild traumatic brain injury (TBI) or concussion is common in many sports. Today, neuropsychological evaluation is recommended in the monitoring of a concussion and in return-to-play considerations. To investigate the sensitivity of neuropsychological assessment, we tested amateur boxers post bout and compared with controls. Further the relationship between neuropsychological test results and brain injury biomarkers in the cerebrospinal fluid (CSF) were investigated. METHOD: Thirty amateur boxers on high elite level with a minimum of 45 bouts and 25 non-boxing matched controls were included. Memory tests (Rey Osterrieth Complex Figure, Listening Span, Digit Span, Controlled Word Association Test, and computerized testing of episodic memory), tests of processing speed and executive functions (Trail Making, Reaction Time, and Finger Tapping) were performed and related to previously published CSF biomarker results for the axonal injury marker neurofilament light (NFL). RESULTS: The neurological assessment showed no significant differences between boxers and controls, although elevated CSF NFL, as a sign of axonal injury, was detected in about 80% of the boxers 1-6 days post bout. The investigation of the relationship between neuropsychological evaluation and CSF NFL concentrations revealed that boxers with persisting NFL concentration elevation after at least 14 days resting time post bout, had a significantly poorer performance on Trail Making A (p = 0.041) and Simple Reaction Time (p = 0.042) compared to other boxers. CONCLUSION: This is the first study showing traumatic axonal brain injury can be present without measureable cognitive impairment. The repetitive, subconcussive head trauma in amateur boxing causes axonal injury that can be detected with analysis of CSF NFL, but is not sufficient to produce impairment in memory tests, tests of processing speed, or executive functions. The association of prolonged CSF NFL increase in boxers with impairment of processing speed is an interesting observation, which needs to be verified in larger studies.
Databáze: OpenAIRE
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