[Model for the functional instruction of swallowing]

Full Abstract

It is difficult to teach students about the mechanism of swallowing. There are three phases of swallowing; oral phase, pharyngeal phase and esophageal phase. The bolus of food is propelled to back of mouth by the tongue and the swallowing reflex happens. After nasopharynx and mouth closure, the glottal closure occurs, then hyoid and larynx are lifted by the contractions of suprahyoid and thyrohyoid muscles. As for the epiglottis, it is compressed by the tongue and inclines downward. As the larynx is lifted upward and anteriorly, slight vacuum is caused in the lower pharynx and upper esophagus at the same time, and pharyngeal constrictor compress bolus, therefore, the bolus passes the piriform fossa, and is inhaled into the esophagus. This time, we made a model in order to explain this complicated mechanism. The mandible is made of paper clay by using a metallic plate in it. The tongue, the soft palate, and the epiglottis are made by using the EVA (Ethylene Vinyl Acetate) sheet. Styloglossus, suprahyoid, thyrohyoid muscles are made with the wire. Moreover, a movable wooden chip represents the contraction of the pharyngeal constrictor muscles. The spring is put in the trachea in order to lift the larynx. The upper part of esophageal constrictor is made with spring plates.

Learn Faster Today Improve your study skills

Author information

Author/s: Satoda, Takahiro (T); Shimoe, Saiji (S); Makihira, Seicho (S); Tamamoto, Mitsuhiro (M); Murayama, Takeshi (T); Nikawa, Hiroki (H);

Affiliation: Department of Oral Health Engineering, School of Oral Health Science, Faculty of Dentistry, Hiroshima University, Kasumi 1-2-3, Minami-ku, Hiroshima 734-8553, Japan.

Journal and publication information

Publication Type: English Abstract; Journal Article

Journal: Kaibogaku zasshi. Journal of anatomy (Kaibogaku Zasshi), published in Japan. (Language: jpn)

Reference: 2008-Jun; vol 83 (issue 2) : pp 51-7

Dates: Created 2008/06/24; Completed 2008/08/12;

PMID: 18572803, status: MEDLINE (last retrieval date: 11/6/2008)

Sourced from the National Library of Medicine. Abstract text and other information may be subject to copyright.

External Links for this article (including full text providers, if available):

Click Electronic Full-text Provider Links to see options for finding the electronic full text links to this article. Note there may be a subscription or fee required for access to the full text. See our FAQ for information on finding FREE full text articles.

This article may also be located in paper journal collections available in many libraries. Use the Journal and Publication Information above to find the full article.

MeSH headings (categories)

This article was linked to the MESH Headings shown below.

Anatomy - education
Deglutition - physiology
Esophagus - physiology
Gagging - physiology
Humans

Larynx
Models, Anatomic
Mouth - physiology
Pharynx - physiology
Teaching Materials

These are the highest related articles currently in the database:

See 100+ related articles.