Cookies Policy
X

This site uses cookies. By continuing to browse the site you are agreeing to our use of cookies.

I accept this policy

Find out more here

Functional Anatomy of the Masticatory Apparatus in the Rabbit (Oryctolagus Cuniculus L.)

No metrics data to plot.
The attempt to load metrics for this article has failed.
The attempt to plot a graph for these metrics has failed.
Brill’s MyBook program is exclusively available on BrillOnline Books and Journals. Students and scholars affiliated with an institution that has purchased a Brill E-Book on the Brill platform automatically have access to the MyBook option for the title(s) acquired by the Library. MyBook is a cheap paperback edition of the original book and will be sold at uniform, low price.

Access this article

+ Tax (if applicable)
Add to Favorites

image of Netherlands Journal of Zoology
For more content, see Archives Néerlandaises de Zoologie (Vol 1-17) and Animal Biology (Vol 53 and onwards).

Jaw muscle activity and mandibular movements were studied in the domestic rabbit by quantitative electromyography and cineradiography. Mandibular movement profile and occlusal interaction depend on the consistency of the food masticated. Minimal vertical and maximal transverse jaw excursions combined with initial edge-to-edge apposition of cheek tooth ridges, followed by an oblique antero-medial shearing movement of the lower teeth into intercuspation characterize hay mastication. This movement is followed by a purely transverse grinding stroke guided by the interlocked ridges and valleys of the teeth. In carrot mastication a vertical, crushing movement predominates. In laboratory pellets, the movement profile is intermediate; occlusal movement is usually confined to a transverse grinding stroke. During chewing jaw closure and deflection toward the working side are caused by simultaneous action of balancing side superficial masseter and medial pterygoid and working side deep masseter and temporalis. The lingually directed power stroke is produced by working side superficial masseter and medial pterygoid and balancing side deep masseter and temporalis. Firing levels are higher on the working than on the balancing side and decrease from hay to pellets to carrot. Transverse muscle force components, generated mainly by the pterygoids also decrease in the series hay-pellets-carrot. The ratio between forces on working and balancing sides allows the balancing side joint to act as a fulcrum; the working side joint remains unloaded. During biting joints are loaded symmetrically. The unique cheek tooth structure allows lagomorphs to apply various combinations of crushing, shearing and grinding forces to their food. By combining strong protractive and transverse muscular forces they can adjust bite force direction. It is argued that this versatility enables them to utilize a wide variety of vegetable matter as food and remain generalized and adapted to different niches.

http://brill.metastore.ingenta.com/content/journals/10.1163/002829680x00212
Loading

Article metrics loading...

/content/journals/10.1163/002829680x00212
1980-01-01
2016-02-08

Affiliations: 1: Department of Anatomy and Embryology, University of Groningen, Groningen, The Netherlands

Sign-in

Can't access your account?
  • Tools

  • Add to Favorites
  • Printable version
  • Email this page
  • Subscribe to ToC alert
  • Get permissions
  • Recommend to your library

    You must fill out fields marked with: *

    Librarian details
    Name:*
    Email:*
    Your details
    Name:*
    Email:*
    Department:*
    Why are you recommending this title?
    Select reason:
     
     
     
     
    Other:
     
    Netherlands Journal of Zoology — Recommend this title to your library

    Thank you

    Your recommendation has been sent to your librarian.

  • Export citations
  • Key

  • Full access
  • Open Access
  • Partial/No accessInformation