Juxtaoral Organ: Ultrastructure and Features Indicating a Mechanoreceptive Function

  • Robert Mayr


Present knowledge about the history of the discovery, about the development and the morphology of the juxtaoral organ is shortly summarized in a separate contribution (Mayr, this volume). Although regularly present as a paired formation in both cheeks in man, in all other mammals, as well as in certain reptiles (squamates), but not found in other vertebrates (amphibia, aves, pisces), the function of this organ is still unknown. After an extensive study of its comparative anatomy, Salzer and Zenker (1962) introduced the descriptive designation “the juxtaoral organ”, according to the most typical common feature (i.e. the paraoral location) of the homologous organs in mammals and reptiles. Concerning the organ’s functional significance, two lines of suggestions have to be considered: (i) Indications of a secretory function of the parenchyma of the organ, and (ii) morphological features indicating a (mechano-)receptive function of the organ (cf. Zenker, 1982). None of the two suggested functions excludes the other. Therefore, both lines of suggestions would require functional studies for verification. Experimental studies in the rat showed that the organ undergoes a high degree of atrophy after hypophysectomy (Salzer and Zenker, 1968).


Basal Lamina Axon Terminal Typical Cross Section Pacinian Corpuscle Golgi Tendon Organ 
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  1. Andres, K.H., and von Düring, M., 1973, Morphology of cutaneous receptors, in: “Somatosensory Systems”, A. Iggo, ed., Handbook of Sensory Physiology, vol. II:2–28, Springer-Verlag, Berlin — Heidelberg — New York.Google Scholar
  2. Barker, D., 1974, The morphology of muscle receptors, in: “Muscle Receptors”, C.C. Hunt, ed., Handbook of Sensory Physiology, vol. III/2:1–190, Springer-Verlag, Berlin — Heidelberg — New York.Google Scholar
  3. Chambers, M.R., Andres, K.H., von Düring, M., and Iggo, A., 1972, The structure and function of the slowly adapting type II mechanoreceptor in hairy skin, Quart. J. exp. Physiol., 57, 417–445.PubMedGoogle Scholar
  4. Iggo, A., 1976, Is the physiology of cutaneous receptors determined by morphology?, Progr. Brain Res., 7, 15–34.CrossRefGoogle Scholar
  5. Jeanneret-Gris, B., 1980, Ultrastructure de 1 organe juxta-oral, Arch. d Anat. microsc., 69, 197–214.Google Scholar
  6. Jeanneret-Gris, B., and Mayr, R., 1980, Ultrastructure de l’organe juxta-oral chez le hamster, Acta anat. (Basel), 108: 264.Google Scholar
  7. Mayr, R., and Salzer, G.M., 1967, Elektronenmikroskopische Untersuchungen am juxtaoralen Organ des Menschen, Z. Zellforsch., 81: 135–154.CrossRefGoogle Scholar
  8. Salzer, G.M., Stockinger, L., and Zenker, W., 1964, Die Ultrastruktur des juxtaoralen Organs der Ratte, Z. Zellforsch., 62, 829–854.PubMedCrossRefGoogle Scholar
  9. Salzer, G.M., and Zenker, W., 1962, Das juxtaorale Organ, Bibliotheca anat., Fasc. J, S. Karger, Basel and New York.Google Scholar
  10. Salzer, G.M., and Zenker, W., 1968, Veranderungen am juxtaoralen Organ der Ratte nach Hypophysektomie, Z. Zellforsch., 84, 72–86.PubMedCrossRefGoogle Scholar
  11. Schoultz, T.W., and Swett, J.E., 1972, The fine structure of the Golgi tendon organ, J. Neurocytol., 1:1–26.PubMedCrossRefGoogle Scholar
  12. Zelená, J., 1978, The development of Pacinian corpuscles, J. Neurocytol., 7, 71–91.PubMedCrossRefGoogle Scholar
  13. Zenker, W., 1982, “Juxtaoral Organ (Chievitz Organ), Morphology and Clinical Aspects”, Urban and Schwarzenberg, Baltimore — Munich.Google Scholar
  14. Zenker, W., and Halzl, L., 1953, Beitrag zur Entwicklung des Chievitz schen Organs beim Menschen, Z. Anat. Entwickl.-Gesch., 117, 215–236.CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media New York 1988

Authors and Affiliations

  • Robert Mayr
    • 1
  1. 1.Institut für Anatomie 2Universität WienWienAustria

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