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Related Concept Videos

Muscles of the Shoulder01:23

Muscles of the Shoulder

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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.
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In fluid mechanics, buoyancy and stability are key concepts for understanding the behavior of submerged and floating bodies. When a stationary body is fully or partially submerged in a fluid, the fluid exerts a force on the body known as the buoyant force. This force acts vertically upward through a point called the center of buoyancy, which is the center of the displaced fluid volume. According to Archimedes' principle, the magnitude of the buoyant force is equal to the weight of the fluid...
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Ribosomes translate genetic information encoded by messenger RNA (mRNA) into proteins. Both prokaryotic and eukaryotic cells have ribosomes. Cells that synthesize large quantities of protein—such as secretory cells in the human pancreas—can contain millions of ribosomes.
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DNA from cells is required for many biotechnology and research applications, such as molecular cloning. To remove and purify DNA from cells, researchers use various methods of DNA extraction. While the specifics of different protocols may vary, some general concepts underlie the process of DNA extraction.
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Meiosis II is the second and final stage of meiosis. It relies on the haploid cells produced during meiosis I, each of which contain only 23 chromosomes—one from each homologous initial pair. Importantly, each chromosome in these cells is composed of two joined copies, and when these cells enter meiosis II, the goal is to separate such sister chromatids using the same microtubule-based network employed in other division processes. The result of meiosis II is two haploid cells, each...
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Related Experiment Video

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Reverse Total Shoulder Arthroplasty
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The floating shoulder.

Kimia Khalatbari Kani1, Jack A Porrino2, Hyojeong Mulcahy3

  • 1Department of Diagnostic Radiology and Nuclear Medicine, University of Maryland School of Medicine, Baltimore, MD, USA. khalatbarik@live.com.

Emergency Radiology
|February 24, 2019
PubMed
Summary

Floating shoulder is a complex injury from high-energy trauma. Accurate computed tomography (CT) imaging is crucial for evaluating these injuries and guiding patient management.

Keywords:
Complex shoulder girdle injuriesFloating shoulderScapular neck fractureSuperior shoulder suspensory complex

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Area of Science:

  • Orthopedic Surgery
  • Radiology
  • Trauma Care

Background:

  • Floating shoulder injuries involve complex disruption of the shoulder girdle.
  • These injuries often result from high-energy trauma, posing diagnostic challenges.

Purpose of the Study:

  • To provide a comprehensive review of floating shoulder injuries.
  • To detail the anatomy, definition, imaging, and treatment strategies.

Main Methods:

  • Review of anatomical structures involved in floating shoulder.
  • Discussion of diagnostic criteria and computed tomography (CT) findings.
  • Overview of current treatment modalities.

Main Results:

  • Floating shoulder injuries require careful evaluation due to their complexity.
  • CT imaging plays a vital role in identifying the extent of injury.
  • Management strategies are tailored to the specific injury pattern.

Conclusions:

  • Accurate diagnosis of floating shoulder injuries is essential for effective management.
  • Computed tomography is indispensable for comprehensive assessment.
  • Understanding the anatomy and injury patterns guides treatment decisions.