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Related Concept Videos

The Hyoid Bone01:12

The Hyoid Bone

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The hyoid bone is a small U-shaped bone located in the upper neck at the level of the inferior mandible, with its tips pointing posteriorly. It does not directly articulate with any other bone in the body. The hyoid acts as the attachment site for the tongue, the larynx, and the pharynx. It is held in position by a series of small muscles attached from above or below. These muscles help to move the hyoid up/down or forward/back in coordination with movements of the tongue, larynx, and pharynx...
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The anterior neck muscles are the group of muscles covering the front part of the neck. These muscles are classified into three subgroups. The first one is the superficial muscles, the most visible muscles in the front of the neck. It includes the platysma and sternocleidomastoid. The second group is the suprahyoid muscles, located above the hyoid bone. This group comprises the digastric, mylohyoid, geniohyoid, and stylohyoid. Lastly, the infrahyoid muscles are found below the hyoid bone and...
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The human larynx, often referred to as the voice box, is an intricate organ located in the neck. It serves as a pathway for air to enter the lungs during respiration and is an essential component of voice production.
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The lateral view of the cranium is dominated by temporal, sphenoid, and ethmoid bones.
The temporal bone forms the lower lateral side of the skull. The temporal bone is subdivided into several regions. The flattened upper portion is the squamous portion of the temporal bone. Below this area and projecting anteriorly is the zygomatic process of the temporal bone, which forms the posterior portion of the zygomatic arch. Posteriorly is the mastoid portion of the temporal bone. Projecting...
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Analysis of Hyoid-Larynx Complex Using 3D Geometric Morphometrics.

Anthony Loth1, Julien Corny, Laure Santini

  • 1Service d'ORL et Chirurgie Cervico-Faciale, Assistance Publique-Hôpitaux de Marseille (AP-HM), Aix-Marseille Université, Centre Hospitalier Universitaire (CHU) La Timone, 264, rue Saint Pierre, 13385, Marseille Cedex 05, France.

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Summary

This study reveals significant anatomical differences in the hyoid bone-larynx complex between sexes, influenced by individual height and weight. These findings highlight considerable variation in this crucial anatomical structure.

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Area of Science:

  • Anatomy
  • Medical Imaging
  • Anthropology

Background:

  • The hyoid bone and larynx are critical for phonation and deglutition.
  • Understanding their detailed anatomy is essential for clinical and forensic applications.
  • Previous studies often lacked detailed, quantitative, and 3D analyses of this complex.

Purpose of the Study:

  • To provide a quantitative anatomical description of the hyoid bone-larynx complex.
  • To utilize advanced 3D reconstruction techniques for precise measurements.
  • To investigate the relationship between anatomical features and individual characteristics like sex, height, and weight.

Main Methods:

  • Utilized CT scan images from 104 living adult subjects.
  • Created 3D reconstructions using the AVIZO 6.2 software package.
  • Performed metric and morphological analyses of the hyoid bone and larynx.

Main Results:

  • Demonstrated significant sexual dimorphism in the hyoid bone-larynx complex.
  • Laryngeal height and width were greater in males, while the thyroid angle was larger in females.
  • Found significant correlations between individual height/weight and measurements of the hyoid-larynx complex.

Conclusions:

  • The hyoid bone-larynx complex exhibits substantial interindividual heterogeneity and sexual dimorphism.
  • Patient morphology, including sex, height, and weight, significantly influences the complex's anatomy.
  • Further research correlating these anatomical findings with functional and imaging data is warranted.