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Related Concept Videos

Shunt Admittances01:26

Shunt Admittances

502
Shunt admittances play a crucial role in the analysis of transmission lines, particularly for three-phase systems with neutral conductors. When a uniformly charged conductor is positioned above the Earth, it induces an equal but opposite charge on its surface. This interaction creates electric field lines between the conductor and the Earth.
To model this effect, the method of images is employed. This method involves replacing the Earth with an image conductor that mirrors the original...
502
Factors Influencing Attraction I: Proximity01:22

Factors Influencing Attraction I: Proximity

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Proximity plays a fundamental role in shaping interpersonal attraction by increasing opportunities for interaction and fostering familiarity. Research consistently demonstrates that individuals are more likely to form social bonds with those who are physically closer to them, whether in residential settings, workplaces, or educational institutions. This effect is largely driven by the increased frequency of encounters, which facilitates the development of friendships and romantic...
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Bone Structure01:55

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Within the skeletal system, the structure of a bone, or osseous tissue, can be exemplified in a long bone, like the femur, where there are two types of osseous tissue: cortical and cancellous.
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Bone Remodeling01:40

Bone Remodeling

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Bone remodeling is a continuous and balanced process of bone resorption by osteoclasts and bone formation by osteoblasts. In adults, it helps maintain bone mass and calcium homeostasis. While mechanical stress can stimulate turnover as part of the normal maintenance and reparative process, several hormones also regulate bone remodeling.
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Compact Bone01:27

Compact Bone

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Most bones contain compact and spongy osseous tissue, but their distribution and concentration vary based on the bone's overall function.
Compact bone, also called cortical bone, is the denser, stronger of the two types of bone tissue. It is found under the periosteum and in the diaphyses of long bones, where it provides support and protection. The microscopic structural unit of compact bone is called an osteon, or haversian system. Each osteon is composed of concentric rings of calcified...
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Bone Disorders01:29

Bone Disorders

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Aging and its effect on bone remodeling is the most common cause of bone disorders. In young and healthy people, bone deposition and resorption happen at an equal rate to maintain optimal bone health.
Bone deposition is also affected by the levels of sex hormones like estrogen and testosterone that promote osteoblast activity and bone matrix synthesis. When the level of these hormones decreases due to aging, it causes a reduction in bone deposition. As a result, bone resorption by osteoclasts...
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Related Experiment Video

Updated: Feb 3, 2026

Neuronavigation and Laparoscopy Guided Ventriculoperitoneal Shunt Insertion for the Treatment of Hydrocephalus
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Neuronavigation and Laparoscopy Guided Ventriculoperitoneal Shunt Insertion for the Treatment of Hydrocephalus

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Bone Overgrowth Causing Proximal Ventriculoperitoneal Shunt Malfunction.

Michael Kim1, Ilya Rybkin2, Harrison Smith2

  • 1Department of Neurosurgery, Westchester Medical Center, Valhalla, New York, USA.

World Neurosurgery
|October 16, 2018
PubMed
Summary
This summary is machine-generated.

A rare cause of ventriculoperitoneal shunt malfunction in hydrocephalus patients was identified as bony overgrowth. This unusual obstruction required surgical intervention, restoring proper cerebrospinal fluid flow and shunt function.

Area of Science:

  • Neurosurgery
  • Medical Devices
  • Pathology

Background:

  • Hydrocephalus is a global condition frequently managed surgically with ventriculoperitoneal shunts.
  • Ventriculoperitoneal shunts are susceptible to malfunctions, including obstruction, disconnection, and infection.
Keywords:
HydrocephalusVentriculoperitoneal shuntVentriculoperitoneal shunt malfunction

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