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Related Concept Videos

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Traumatic Brain Injury l: Introduction

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DefinitionTraumatic brain injury, or TBI, is a disturbance of normal brain function induced by an external mechanical force, such as a direct blow to the head or a penetrating injury. It can affect both brain structure and function, producing a wide range of clinical outcomes. TBI is a heterogeneous condition, meaning its effects may differ based on the type, location, and severity of the injury.Basis of ClassificationTBI is classified based on severity, injury mechanism, or pathophysiology. In...
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DefinitionHepatic encephalopathy is a reversible neurologic syndrome that results from advanced liver dysfunction or portosystemic shunting. It leads to disturbances in cognition, behavior, and motor function due to the brain’s exposure to gut-derived toxins that the liver fails to detoxify.EtiologyThis condition develops either in the setting of acute fulminant hepatitis or progressively during chronic liver disease, such as cirrhosis and portal hypertension. Portosystemic...
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Dementia is an acquired, progressive syndrome characterized by a decline in multiple cognitive domains severe enough to impair daily functioning and reduce independence. Although memory loss is a central feature, the diagnosis requires additional deficits involving language, executive function, visuospatial skills, judgment, calculation, or abstract reasoning. These cognitive impairments reflect underlying neurodegenerative or vascular processes that gradually disrupt neuronal networks...
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Alzheimer disease is a chronic, progressive, and irreversible neurodegenerative disorder and the most common cause of dementia in older adults. It leads to gradual neuronal loss, causing cognitive decline, behavioral changes, and loss of functional independence.Risk Factors and EtiologyThe disease is multifactorial. Age is the strongest risk factor, with prevalence doubling every 5 years after age 65. Genetic factors include mutations in genes such as APP, PSEN1, and PSEN2, which are associated...
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Emotionally traumatic events often lead to memories that are exceptionally vivid and enduring, sometimes persisting with remarkable clarity throughout an individual's life. A classic example of this phenomenon is a person who survives a car accident. Even years later, they may recall every detail of the event with startling accuracy — the screeching of the tires, the jarring impact, and the acrid smell of burning rubber. Such vividness contrasts sharply with how an individual...
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Alzheimer disease involves structural changes in the brain that begin long before symptoms appear. The most distinctive features are extracellular neuritic plaques and intracellular neurofibrillary tangles.Neuritic plaques form in the cerebral cortex and around blood vessels. These plaques contain a dense core of beta-amyloid (Aβ)—a toxic protein fragment that clumps outside neurons. The core is surrounded by damaged neuronal extensions, as well as reactive astrocytes and...
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Related Experiment Video

Updated: Apr 19, 2026

In Vivo Protocol of Controlled Subconcussive Head Impacts for the Validation of Field Study Data
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Chronic traumatic encephalopathy: The unknown disease.

R Martínez-Pérez1, I Paredes2, P M Munarriz1

  • 1Servicio de Neurocirugía, Hospital 12 de Octubre, Madrid, España; Facultad de Medicina, Universidad Complutense, Madrid, España.

Neurologia (Barcelona, Spain)
|December 24, 2014
PubMed
Summary
This summary is machine-generated.

Chronic traumatic encephalopathy (CTE) is a progressive brain disease from repeated head trauma, with no current diagnosis or cure. Early detection and prevention are key for managing CTE symptoms.

Keywords:
AdolescentAdolescenteBoxingDemenciaDementiaDeportivoEncefalopathyEncefalopatíaKnock outPugilísticaSports

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Area of Science:

  • Neuroscience
  • Neuropathology
  • Sports Medicine

Background:

  • Chronic traumatic encephalopathy (CTE) is a neurodegenerative disease resulting from cumulative subconcussive and concussive head impacts.
  • Currently, definitive diagnosis of CTE can only be confirmed postmortem.
  • No specific treatments are available for CTE, highlighting the need for early detection and prevention strategies.

Purpose of the Study:

  • To review the current understanding of chronic traumatic encephalopathy (CTE).
  • To discuss risk factors, diagnostic challenges, and clinical presentation of CTE.
  • To emphasize the importance of prevention and early symptom identification for managing CTE.

Main Methods:

  • Literature review of existing studies on chronic traumatic encephalopathy.
  • Analysis of histopathological findings, clinical manifestations, and risk factors.
  • Evaluation of emerging diagnostic tools and management approaches.

Main Results:

  • CTE is characterized by the accumulation of hyperphosphorylated tau protein, distinct from but sharing features with Alzheimer disease.
  • Clinical progression involves cognitive, emotional, and motor symptoms, ultimately leading to dementia.
  • Risk factors include contact sports participation, apolipoprotein E4 presence, and advanced age.

Conclusions:

  • Despite promising experimental diagnostic tools, premortem diagnosis and effective treatments for CTE remain elusive.
  • Prevention of traumatic brain injuries and early recognition of initial symptoms are crucial for managing CTE.
  • Further research is needed to develop reliable diagnostic methods and therapeutic interventions for CTE.