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Related Concept Videos

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There are hollow fluid-filled cavities known as ventricles deep inside the human brain. There are two lateral ventricles, one in each cerebral hemisphere, and each has three different projections — the anterior, inferior, and posterior horns visible from the lateral side. A thin membrane called the septum pellucidum separates the two lateral ventricles. The slender third ventricle in the diencephalon is connected to each lateral ventricle via a channel called the interventricular foramen.
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The cross-sectional anatomy of the spinal cord offers a detailed view of its complex structure and function within the central nervous system. At the core of the spinal cord lies the gray matter, characterized by its butterfly or "H"-shaped appearance in cross-section. This central region is enveloped by white matter, with the overall structure divided into symmetrical halves by the dorsal median sulcus and the ventral median fissure.
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Related Experiment Video

Updated: Apr 25, 2026

Pre-Chiasmatic, Single Injection of Autologous Blood to Induce Experimental Subarachnoid Hemorrhage in a Rat Model
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Dorsal arachnoid web.

Paul C McCormick1

  • 1Columbia University College of Physicians and Surgeons, New York, New York.

Neurosurgical Focus
|September 2, 2014
PubMed
Summary
This summary is machine-generated.

Dorsal thoracic arachnoid webs are a rare cause of spinal cord compression. This video shows microsurgical resection of a dorsal arachnoid band, relieving progressive myelopathy.

Keywords:
arachnoid webdorsalmyelopathyvideo

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Area of Science:

  • Neurosurgery
  • Spinal Surgery
  • Neurology

Background:

  • Dorsal thoracic arachnoid webs are an uncommon cause of progressive myelopathy.
  • Associated syringomyelia may occur above or below the arachnoid band.
  • Differential diagnoses include dorsal arachnoid cysts and ventral spinal cord herniation.

Observation:

  • A 63-year-old man presented with progressive myelopathy.
  • Microsurgical techniques were employed for identification and resection.
  • The condition was caused by a dorsal arachnoid band compressing the spinal cord.

Findings:

  • Successful microsurgical resection of the dorsal arachnoid band was performed.
  • The procedure aimed to decompress the spinal cord.
  • Visual documentation of the surgical technique is provided.

Implications:

  • This video demonstrates a viable surgical approach for dorsal thoracic arachnoid webs.
  • Early diagnosis and surgical intervention can prevent further neurological decline.
  • Microsurgical resection offers a potential solution for myelopathy caused by these rare spinal anomalies.