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Related Concept Videos

Plastic Deformations01:19

Plastic Deformations

439
Plastic deformation represents a fundamental concept in materials science, which explains the irreversible change in the shape of a material when it experiences stress beyond its elastic capability. This phenomenon is important in structural engineering, especially in designing and analyzing cantilever beams—structures that are securely fixed at one end and bear loads at the opposite end. When these beams are subjected to loads within their elastic range, they will return to their...
439
Plastic Deformations01:14

Plastic Deformations

412
It is essential to understand how structural members behave under plastic deformation when the bending stress exceeds the material's yield strength. This state of deformation permanently alters the shape of the member, in contrast to the linear elastic behavior observed before yielding. The strain at any point in the member is expressed in terms of maximum strain. Notably, the neutral axis, which coincides with the centroid during elastic bending, shifts away from the centroid under plastic...
412
Temperature Dependent Deformation01:12

Temperature Dependent Deformation

372
In a nonhomogeneous rod made up of steel and brass, restrained at both ends and subjected to a temperature change, several steps are involved in calculating the stress and compressive load. Due to the problem's static indeterminacy, one end support is disconnected, allowing the rod to experience the temperature change freely. Next, an unknown force is applied at the free end, triggering deformations in the rod's steel and brass portions. These deformations are then calculated and added...
372
Deformations in a Symmetric Member in Bending01:18

Deformations in a Symmetric Member in Bending

482
When analyzing the deformation of a symmetric prismatic member subjected to bending by equal and opposite couples, it becomes clear that as the member bends, the originally straight lines on its wider faces curve into circular arcs, with a constant radius centered at a point known as Point C. This phenomenon helps to understand the stress and strain distribution within the member more clearly.
When the member is segmented into tiny cubic elements, it is observed that the primary stress...
482
Deformation of Member under Multiple Loadings01:11

Deformation of Member under Multiple Loadings

451
When a rod is made of different materials or has various cross-sections, it must be divided into parts that meet the necessary conditions for determining the deformation. These parts are each characterized by their internal force, cross-sectional area, length, and modulus of elasticity. These parameters are then used to compute the deformation of the entire rod.
In the case of a member with a variable cross-section, the strain is not constant but depends on the position. The deformation of an...
451
Deformation in a Circular Shaft01:10

Deformation in a Circular Shaft

876
One of the distinctive characteristics of circular shafts is their ability to maintain their cross-sectional integrity under torsion. In other words, each cross-section continues to exist as a flat, unaltered entity, simply rotating like a solid, rigid slab. To understand the distribution of shearing stress within such a shaft, consider a cylindrical section inside this circular shaft. This section has a length of L and a radius of R, with one end fixed. The radius of the cylindrical section is...
876

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Related Experiment Video

Updated: Jan 22, 2026

Enhancing the Development and Growth of Infant Cerebral Palsy Rats Using Selective Spinal Manipulations
05:04

Enhancing the Development and Growth of Infant Cerebral Palsy Rats Using Selective Spinal Manipulations

Published on: February 2, 2024

951

[Cerebral palsy and spinal deformities].

Muharrem Yazici1, Hakan Senaran

  • 1Hacettepe Universitesi Tip Fakültesi Ortopedi ve Travmatoloji Anabilim Dali.

Acta Orthopaedica Et Traumatologica Turcica
|May 19, 2009
PubMed
Summary

Cerebral palsy (CP) patients with scoliosis often require surgery as conservative methods fail. Posterior spinal fusion with pedicle screws effectively corrects severe spinal curves in CP.

Area of Science:

  • Neurology
  • Orthopedic Surgery
  • Pediatric Medicine

Context:

  • Cerebral palsy (CP) is a common neurological disorder affecting motor function.
  • Musculoskeletal issues, including scoliosis, are prevalent in CP patients.
  • Scoliosis severity correlates with motor impairment and negatively impacts quality of life.

Purpose:

  • To evaluate the efficacy of posterior spinal instrumentation and fusion using pedicle screws for severe scoliosis in cerebral palsy.
  • To assess the potential of this surgical technique to correct spinal deformities and improve functional outcomes.

Summary:

  • Increased muscle tone in cerebral palsy leads to joint contractures and scoliosis.
  • Conservative treatments for scoliosis in CP are often insufficient.

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  • Posterior spinal fusion with pedicle screws allows for three-plane fixation, effectively correcting severe spinal curves and avoiding anterior surgery.

    • Impact:

    • This surgical approach offers a viable solution for managing severe scoliosis in cerebral palsy patients.
    • Improved spinal alignment can positively influence functional capacity, daily care, and nutritional status.
    • Pedicle screw fixation enhances surgical outcomes, potentially reducing the need for combined anterior-posterior procedures.