Chronic traumatic encephalopathy: a critical appraisal

Area of Science:

• Neurology
• Sports Medicine
• Neurodegenerative Diseases

Background:

• Chronic traumatic encephalopathy (CTE), previously dementia pugilistica, is a neurodegenerative disorder.
• It is strongly associated with repetitive subconcussive head trauma, common in high-contact sports.
• Understanding CTE is crucial for athletes, clinicians, and researchers.

Purpose of the Study:

• To review existing literature on CTE, focusing on epidemiology, risk factors, and progression.
• To explore pathophysiological mechanisms for improved clinical diagnosis and prevention.
• To identify future research perspectives for CTE.

Main Methods:

• Comprehensive literature search of Medline and Cochrane databases.
• Manual review of bibliographies from selected articles and monographs.
• Analysis of epidemiological trends, risk factors, and temporal progression.

Main Results:

• CTE prevalence is increasing, predominantly affecting men.
• Symptoms include memory loss, behavioral changes, aggression, and Parkinsonian-like signs.
• Postmortem findings reveal neurofibrillary tangles and Aβ plaques in 50% of cases.
• High mortality rates are associated with suicide, accidents, and substance abuse.

Conclusions:

• Current diagnostic criteria for CTE are lacking, with no definitive ante-mortem tests.
• Advanced imaging techniques like fMRI, MR spectroscopy, and DTI show promise for future diagnosis.
• Longitudinal studies are essential to elucidate risk factors, disease progression, and pathogenesis.