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Related Concept Videos

Hepatic Encephalopathy01:29

Hepatic Encephalopathy

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 shunting—including...
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The blood drainage from the head and neck is primarily managed by three pairs of veins: the external jugular, internal jugular, and vertebral veins. The external jugular veins drain superficial scalp and face structures, passing over the sternocleidomastoid muscles to empty into the subclavian veins.
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The inner ear assumes dual functionalities of auditory perception and equilibrium maintenance. The vestibule is the organ responsible for balance. This organ contains mechanoreceptors, specifically hair cells, endowed with stereocilia, which aid in deciphering information regarding the position and motion of our heads. Two intrinsic components, the utricle and saccule, help perceive head position, while the semicircular canals track head movement. Neurological messages initiated in the...
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A brain abscess is a focal, intracerebral infection characterized by a localized collection of pus within the brain parenchyma, resulting from microbial invasion and the body’s inflammatory response. It progresses through stages: early and late cerebritis, followed by early and late capsule formation, reflecting tissue destruction, immune response, and eventual encapsulation.Etiology and PathogenesisCausative organisms vary with source and host factors, often involving polymicrobial infections,...
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Portal hypertension is an increase in blood pressure within the portal venous system. Normally, this pressure is less than 5 mmHg. It is considered clinically significant when it rises above 10 mmHg. At this threshold, complications from altered blood flow and venous congestion emerge.EtiologyPortal hypertension arises from conditions that impede blood flow through the liver. The most common cause is cirrhosis, in which chronic liver injury leads to fibrotic scarring. This fibrosis narrows or...
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Related Experiment Video

Updated: Jun 16, 2026

3D-Neuronavigation In Vivo Through a Patient's Brain During a Spontaneous Migraine Headache
10:39

3D-Neuronavigation In Vivo Through a Patient's Brain During a Spontaneous Migraine Headache

Published on: June 2, 2014

Pearls: headache.

David W Dodick1

  • 1Department of Neurology, Mayo Clinic Arizona, Phoenix, Arizona, USA. dodick.david@mayo.edu

Seminars in Neurology
|February 4, 2010
PubMed
Summary
This summary is machine-generated.

Accurate headache diagnosis hinges on patient history. A systematic approach with standard questions is crucial for differentiating primary and secondary headaches, ensuring correct diagnosis and treatment.

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Last Updated: Jun 16, 2026

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Area of Science:

  • Neurology
  • Clinical Medicine

Background:

  • Headache diagnosis requires differentiating primary from secondary causes.
  • Primary headache disorders account for 90% of cases, often with normal examinations.

Observation:

  • Patient history is paramount in headache medicine.
  • Key information is often not volunteered by patients and must be elicited.
  • A structured series of questions is essential for evaluation.

Findings:

  • A systematic history-taking process is vital for accurate diagnosis.
  • Standardized questions aid in identifying primary headache disorders.
  • This approach helps prevent overlooking secondary causes.

Implications:

  • Emphasizing diagnostic history improves primary headache diagnosis.
  • Standardized questioning can make accurate diagnosis nearly fail-proof.
  • Better diagnostic training is needed for primary headache disorders.