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Related Concept Videos

Torsion of Noncircular Members01:16

Torsion of Noncircular Members

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Circular shafts undergoing torsional stress maintain their cross-sectional integrity due to their axisymmetric nature. This symmetry ensures an even distribution of stress, allowing the shaft to withstand torsion without distorting. In contrast, square bars, lacking this axial symmetry, experience significant distortion across their cross-sections when subjected to torsion, with the exception of along their diagonals and at lines connecting midpoints. A detailed examination of a cubic element...
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Deformation in a Circular Shaft01:10

Deformation in a Circular Shaft

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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...
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Torsional Pendulum01:09

Torsional Pendulum

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A torsional pendulum involves the oscillation of a rigid body in which the restoring force is provided by the torsion in the string from which the rigid body is suspended. Ideally, the string should be massless; practically, its mass is much smaller than the rigid body's mass and is neglected.
As long as the rigid body's angular displacement is small, its oscillation can be modeled as a linear angular oscillation. The amplitude of the oscillation is an angle. The role of mass is played...
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General Case of Eccentric Axial Loading01:12

General Case of Eccentric Axial Loading

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Unsymmetrical bending occurs when the bending moment applied to a structural member does not align with its principal axis. This misalignment leads to complex stress distributions and deflection patterns that differ from symmetrical bending, which are essential for designing structures to withstand different loading conditions.
Consider a member subjected to equal and opposite forces that are applied along a line that does not coincide with the member's neutral axis. In unsymmetrical...
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Angle of Twist: Problem Solving01:13

Angle of Twist: Problem Solving

849
An electric motor applies a torque of 700 N·m to an aluminum shaft, triggering a stable rotation. Two pulleys, B and C, are subjected to torques of 300 N·m and 400 N·m, respectively. The modulus of rigidity is provided as 25 GPa. With the knowledge of the length and diameter of each segment, the twist angle between the two pulleys can be computed. First, a section cut is made between pulleys B and C, and the cut cross-section is analyzed using a free-body diagram. Given that the torque...
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Torque01:10

Torque

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Torque is an important quantity for describing the dynamics of a rotating rigid body. We see the application of torque in many ways in the world, such as when pressing the accelerator in a car, which causes the engine to apply additional torque on the drivetrain. Here, we define torque and provide a framework to create an equation to calculate torque for a rigid body with fixed-axis rotation.
Torque can be considered as the rotational counterpart to force. Since forces change the translational...
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Updated: Mar 23, 2026

Method to Measure Tone of Axial and Proximal Muscle
10:41

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Appendicular Torsion.

Siddharth Pramod Dubhashi1, Bharat Khadav2

  • 1Dr. D. Y. Patil Medical College, Hospital and Research Centre, Pimpri, Pune, Maharashtra, India.

Nigerian Journal of Surgery : Official Publication of the Nigerian Surgical Research Society
|March 26, 2016
PubMed
Summary
This summary is machine-generated.

Appendicular torsion, a rare cause of right iliac fossa pain, involves twisting of the vermiform appendix. This case report details a 52-year-old female with a 180° anti-clockwise appendix rotation.

Keywords:
Anti-clockwiseappendixprimarysecondarytorsion

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Area of Science:

  • Gastroenterology
  • Surgical Pathology

Background:

  • Appendicular torsion is an uncommon surgical emergency.
  • It can be primary or secondary, leading to complications like strangulation and infarction.

Observation:

  • A case of a 52-year-old female presenting with appendicular torsion is reported.
  • The torsion involved a 180° anti-clockwise rotation of the vermiform appendix.

Findings:

  • Appendicular torsion is a rare condition.
  • Diagnosis is typically confirmed during surgical exploration.
  • Torsion can result in compromised blood supply, leading to tissue death.

Implications:

  • Appendicular torsion should be considered in the differential diagnosis of acute right iliac fossa pain.
  • Early recognition and surgical intervention are crucial to prevent complications.
  • This case highlights the importance of considering rare pathologies in abdominal pain.