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Olivary Nucleus
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Concrete exhibits specific behaviors under different compressive loads. Understanding this is crucial for understanding its structural integrity. When concrete undergoes uniaxial compression, it tends to develop cracks that run parallel to the direction of the force. These parallel cracks stem from localized tensile stresses that occur perpendicular to the compression direction. Additionally, angled cracks may appear due to the formation of shear planes.
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Calibrated Forceps Model of Spinal Cord Compression Injury
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Symptomatic medulla compression by vertebral artery.

Leszek Lombarski1, Przemysław Kunert1, Marcin Skawiński1

  • 1Department of Neurosurgery, Medical University of Warsaw, Banacha 1a st., 02-097 Warsaw, Poland.

Neurologia I Neurochirurgia Polska
|April 25, 2018
PubMed
Summary
This summary is machine-generated.

Vertebral artery medulla compression syndrome (VAMCS) is rare. Microvascular decompression (MVD) with a Gore-Tex implant effectively treated a patient, though VA repositioning showed higher success rates in literature review.

Keywords:
Medulla oblongataMicrovascular decompressionNeurovascular conflictVertebral artery

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Area of Science:

  • Neurology
  • Neurosurgery
  • Vascular Neurology

Background:

  • Vertebral artery medulla compression syndrome (VAMCS) is a rare condition causing focal neurological deficits.
  • Symptoms can include hemiparesis and sensory loss due to brainstem compression.

Observation:

  • The patient presented with left-sided hypoalgesia, hypothermesthesia, and hemiparesis.
  • MRI and DTI confirmed VA compression of the medulla and pyramidal tract, ruling out other pathologies.

Findings:

  • Microvascular decompression (MVD) using a Gore-Tex implant effectively treated the patient's VAMCS symptoms.
  • Neurological improvement was sustained at one-year follow-up.

Implications:

  • VAMCS should be considered in cases of unexplained neurological deficits.
  • While MVD is effective, VA repositioning demonstrates a significantly higher success rate (91% vs. 58%) in literature reviews.