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Traumatic Brain Injury l: Introduction01:28

Traumatic Brain Injury l: Introduction

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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Early Ischemia and Ionic ImbalanceWithin minutes of spinal cord injury, a secondary cascade begins, progressing over hours to weeks. Vascular damage reduces blood flow, causing ischemia and mitochondrial dysfunction. ATP depletion leads to ion pump failure, membrane depolarization, sodium influx, potassium efflux, and water accumulation, resulting in cellular swelling. Increased intracellular calcium further disrupts mitochondria and accelerates cellular injury.Excitotoxicity and Neuronal...
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Understanding seizures and epilepsy relies on key definitions that help in recognizing, classifying, and managing these disorders. These definitions provide a framework for recognizing, classifying, and managing seizure disorders.DefinitionsA seizure is a sudden, abnormal burst of electrical activity in the brain that can cause changes in awareness, movement, sensation, or behavior, depending on the area involved. Epilepsy is a chronic condition characterized by recurrent, unprovoked seizures,...
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Related Experiment Video

Updated: Jul 3, 2026

ALS - Motor Neuron Disease: Mechanism and Development of New Therapies
15:48

ALS - Motor Neuron Disease: Mechanism and Development of New Therapies

Published on: July 29, 2007

[Life with Locked-In syndrome].

M A Bruno1, F Pellas, J L Bernheim

  • 1Coma Science Group, Centre de Recherches du Cyclotron, Université de Liège, Liège, Belgique.

Revue Medicale De Liege
|August 2, 2008
PubMed
Summary

Locked-In Syndrome (LIS) is a condition resulting from brainstem lesions, causing paralysis while preserving consciousness. Despite its severity, LIS patients report a surprisingly good quality of life, with infrequent requests for end-of-life interventions.

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Area of Science:

  • Neurology
  • Neuroscience
  • Clinical Medicine

Context:

  • Locked-In Syndrome (LIS) is a rare neurological disorder.
  • Characterized by quadriplegia and anarthria with preserved consciousness.
  • Typically caused by anterior pontine vascular lesions.

Purpose:

  • To review the definition, etiologies, diagnosis, and prognosis of LIS.
  • To discuss quality of life and end-of-life decisions in LIS patients.
  • To provide an overview of current understanding and management strategies for LIS.

Summary:

  • LIS involves severe physical impairment but intact cognitive function.
  • Review covers LIS causes, diagnostic approaches, and expected outcomes.
  • Explores patient quality of life and ethical considerations.

Impact:

  • Highlights the discrepancy between clinical perception and patient self-reported quality of life in LIS.
  • Informs clinical practice regarding LIS patient care and support.
  • Contributes to the discussion on end-of-life decision-making for severely disabled individuals.