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Related Concept Videos

Muscles of the Shoulder01:23

Muscles of the Shoulder

The muscles surrounding the shoulder girdle, including the clavicle and scapula, primarily stabilize the scapula. This stable base allows other muscles to move the humerus effectively. Scapular movements often mirror those of the humerus and extend its range of motion. For instance, raising the arm above the head would not be feasible without simultaneous upward rotation of the scapula.
Anterior Thoracic Muscles
The anterior thoracic muscles include the serratus anterior, subclavius, and...
Applications of Stress01:04

Applications of Stress

Consider a structure made of a boom and a rod designed to support a load. These two components are connected by a pin and stabilized by brackets and pins. The boom and the rod are detached from their supports to assess the different stresses imposed on this structure, and a free-body diagram is drawn. Then, all the forces applied, including the load acting on the structure, are identified. The reaction forces exerted on both the boom and the rod are computed using the equilibrium equations.
The...
Stresses in a Shaft01:18

Stresses in a Shaft

The shaft PQ is subjected to a twisting force when equal and opposite torques are applied on either side. A section that cuts perpendicular to the shaft's axis at any arbitrary point R is examined to understand this. When the free-body diagram of the QR segment is analyzed, it reveals the shearing forces exerted by the PR portion onto the QR segment as the shaft experiences twisting.
Applying equilibrium conditions to the QR segment establishes that the internal shearing forces within the...
Stress: General Loading Conditions01:15

Stress: General Loading Conditions

To grasp the intricacy of real-world conditions where multiple loads are applied simultaneously to a structure, one might visualize a section passing through a specific point within a body, aligned parallel to the xy plane. This section is subjected to various forces, including original loads, normal forces, and shearing forces.
The shearing force, possessing potential directionality within the plane of the section, is simplified into two component forces running parallel to the x and y axes.
Shearing Stress01:18

Shearing Stress

Shearing stress, denoted by the Greek letter tau (τ), is stress caused by forces acting transversely on an object. These forces create internal ones within the entity in the plane where the external forces are applied. The resultant of these internal forces is the shear in the section.
The average shearing stress can be calculated by dividing the shear by the area of the cross-section.
Flail Chest-II01:26

Flail Chest-II

Managing flail chest, a condition characterized by a segment of the chest wall moving independently from the rest of the thoracic cage, requires a comprehensive approach. It includes a thorough assessment of the patient's condition, a diagnostic evaluation to determine the extent of the injury, and the implementation of appropriate medical interventions tailored to the individual's needs.
Assessment:
1. Clinical Evaluation:
History:

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Related Experiment Video

Updated: Jun 4, 2026

Tuina in a Frozen Shoulder Rat Model: An Efficient and Reproducible Protocol
04:28

Tuina in a Frozen Shoulder Rat Model: An Efficient and Reproducible Protocol

Published on: July 21, 2023

The shoulder: taking the strain during restraint.

L P Hollins1, B Stubbs

  • 1leehollins@winchesterscott.co.uk

Journal of Psychiatric and Mental Health Nursing
|February 9, 2011
PubMed
Summary
This summary is machine-generated.

Physical interventions can injure the shoulder. Understanding shoulder anatomy and physiology is crucial for safe risk assessment of holds and escape maneuvers.

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Area of Science:

  • Biomechanics
  • Human Anatomy
  • Physiology

Background:

  • Physical intervention techniques involve complex legal and ethical considerations.
  • Risk of injury from physical interventions is a significant concern.
  • Existing research primarily addresses restraint asphyxia and pain compliance, neglecting other injury risks.

Purpose of the Study:

  • To analyze the structure and function of the shoulder.
  • To examine how physical interventions and risk factors impact shoulder integrity.
  • To inform practitioners on the immediate physical effects of holds and escape maneuvers.

Main Methods:

  • Anatomical and physiological examination of the shoulder.
  • Analysis of physical intervention techniques and associated risk factors.
  • Review of existing literature on physical interventions and injury.

Main Results:

  • Physical interventions can compromise shoulder structure and function.
  • Various risk factors exacerbate the potential for shoulder injury.
  • A gap exists in understanding the specific shoulder-related risks of holds and escapes.

Conclusions:

  • A thorough understanding of shoulder anatomy and physiology is essential for accurate risk assessment.
  • Practitioners require detailed knowledge to evaluate the physical impact of interventions.
  • This study provides a foundation for improved safety protocols in physical interventions.