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Related Concept Videos

Tension01:10

Tension

Tension is a force along the length of a medium, in particular, a force carried by a flexible medium, such as a rope or cable. The word "tension" comes from Latin, meaning "to stretch". Not coincidentally, the flexible cords that carry muscle forces to other parts of the body are called tendons. Any flexible connector, such as a string, rope, chain, wire, or cable, can exert pull only parallel to its length; so, a force carried by a flexible connector is a tension with a direction parallel to...
Tension01:10

Tension

Tension is a force along the length of a medium, in particular, a force carried by a flexible medium, such as a rope or cable. The word "tension" comes from Latin, meaning "to stretch". Not coincidentally, the flexible cords that carry muscle forces to other parts of the body are called tendons. Any flexible connector, such as a string, rope, chain, wire, or cable, can exert pull only parallel to its length; so, a force carried by a flexible connector is a tension with a direction parallel to...
Major Losses in Pipes01:28

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Healing II: Complications01:24

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Complications during healing arise when tissue repair is altered by local or systemic factors. These changes involve abnormal collagen deposition, altered biomechanics, and reduced vascular supply, impairing restoration of normal structure and function.Loss of FunctionScar tissue differs significantly from the original tissue it replaces. In the skin, fibrosis lacks adnexal structures such as hair follicles, sebaceous glands, and sweat glands. Their absence reduces tactile sensitivity, impairs...
Minor Losses in Pipes01:25

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Social Traps01:41

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Enactive Phenomenological Approach to the Trier Social Stress Test: A Mixed Methods Point of View
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The troubles I've seen.

Norman J Schatz1

  • 1Bascom Palmer Eye Institute, University of Miami, Miami, Florida, USA. njschatz@bellsouth.net

Journal of Neuro-Ophthalmology : the Official Journal of the North American Neuro-Ophthalmology Society
|September 7, 2010
PubMed
Summary
This summary is machine-generated.

Idiopathic intracranial hypertension (IIH) diagnosis and monitoring benefit from magnetic resonance venography (MRV) to assess cerebral venous sinuses. Visual cognitive changes, often linked to posterior cortical atrophy, present as visuoperceptual disturbances.

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Area of Science:

  • Neurology
  • Neuroradiology
  • Neuro-ophthalmology

Background:

  • Idiopathic intracranial hypertension (IIH) is a condition characterized by elevated intracranial pressure without a clear cause.
  • Cerebral venous sinus abnormalities are implicated in IIH.
  • Visual cognitive deficits can be subtle and may indicate underlying posterior cortical atrophy.

Purpose of the Study:

  • To highlight the role of magnetic resonance venography (MRV) in diagnosing and managing IIH.
  • To discuss the association between cerebral venous sinus abnormalities and IIH.
  • To review visual cognitive changes and their connection to posterior cortical atrophy.

Main Methods:

  • Presentation of patient cases with IIH.
  • Emphasis on the utility of MRV in evaluating cerebral venous sinuses.
  • Review of clinical presentations and neuroimaging findings in posterior cortical atrophy.

Main Results:

  • MRV can reveal focal stenosis or venous gaps in IIH, indicative of elevated intracranial pressure.
  • IIH can occur secondary to cerebral venous sinus thrombosis, a diagnosis aided by MRV.
  • Visual cognitive changes involve visuoperceptual disturbances, affecting the comprehension of visual information.

Conclusions:

  • MRV is crucial for evaluating cerebral venous sinuses in IIH and diagnosing associated thrombosis.
  • Future assessment of cerebral venous sinus flow may predict visual failure risk in IIH.
  • Visual cognitive deficits are often manifestations of posterior cortical atrophy, requiring comprehensive neuroimaging and metabolic evaluation.