Springer Nature is making SARS-CoV-2 and COVID-19 research free. View research | View latest news | Sign up for updates

The location and distribution of type A and type B atrial endings in cats

Summary

In the attempt to explain the difference in discharge pattern of atrial endings, 131 endings were localized by punctate stimulation, 44 were type A, 77 type B and 10 of an intermediate type. All were located on the dorsal wall of the atria with none on the ventral wall or in the appendage. On the right side, 74% of type A were located in the atria and 63% of type B in or near the veins. On the left side, 67% of type A and 94% of type B were located in or near the veins. Thus, there appeared to be some difference in the location of type A and type B endings on the right side, but on the left side both types of endings were for the most part confined to the venous region. Further, on both right and left sides, these endings were present both in the central part of the atria and in or adjacent to veins. This leads to the suggestion that the difference in discharge patterns is not caused by the location but may be due to some other reasons, e. g. difference of arrangement in the atrial wall with respect to the contractile elements.

This is a preview of subscription content, log in to check access.

References

  1. Arndt, J. O., Brambring, P., Hindorf, K., Röhnelt, M.: The afferent discharge pattern of atrial mechano-receptors in the cat during sinusoidal stretch of atrial strips in situ. J. Physiol. (Lond.)240, 33–52 (1974)

  2. Coleridge, H. C. G., Hemingway, A., Holmes, R. L., Linden, R. J.: The location of atrial receptors in the dog. J. Physiol. (Lond.)136, 174–197 (1957)

  3. Coleridge, H. M., Coleridge, J. C. G., Kidd, C.: Cardiac receptors in the dog, with particular reference to two types of afferent ending in the ventricular wall. J. Physiol. (Lond.)174, 323–339 (1964)

  4. Floyed, K., Linden, R. J., Saunders, D. A.: Presumed receptors in the left atrial appendage of the dog. J. Physiol. (Lond.)227, 27–28P (1972)

  5. Gupta, B. N.: The location of types A and B atrial receptors in cats. Ind. J. Physiol. Allied Sci.26, 22–23 (1972). Presented in Indian Physiological Cong. 1971

  6. Holmes, R. L.: Structure in the atrial endocardium of the dog which stain with methylene blue and effect of unilateral vagatomy. J. Anat. (Lond.)91, 259–266 (1957)

  7. Johnston, B. D.: Nerve endings in the human endocardium. Amer. J. Anat.122, 621–630 (1968)

  8. Khabarova, A. Ya.: The afferent innervation of the heart. Consultants Bureau. Enterprises Inc. (New York) 11, New York 1963

  9. Langrehr, D.: Entladungsmuster und allgemeine Reizbedingungen von Vorhofreceptoren bei Hund und Katze. Arch. ges. Physiol.271, 257–269 (1960)

  10. Miller, R. M., Kasahara, M.: Studies on the nerve endings in the heart. Amer. J. Anat.115, 217–234 (1964)

  11. Neil, E., Joels, N.: The impulse activity in cardiac afferent vagal fibres. Naunyn-Schmiedeberg's Arch. exp. Path. Pharmak.240, 453–460 (1961)

  12. Nonidez, J. F.: Identification of receptor areas in the venae cavae and pulmonary veins which initiate reflex cardiac acceleration (Bainbridge's reflex). Amer. J. Anat.61, 203–231 (1937)

  13. Paintal, A. S.: A study of right and left atrial receptors. J. Physiol. (Lond.)120, 596–610 (1953)

  14. Paintal, A. S.: Vagal afferent fibres. Ergebn. Physiol.52, 74–156 (1963)

  15. Paintal, A. S.: Cardiovascular receptors: Handbook of sensory physiology (E. Neil, ed.), Vol. III/1, pp. 1–45. Berlin-Heidelberg-New York: Springer 1972

  16. Pearce, J. W., Henry, J. P., Chapman, K. M.: The behaviour and possible function of cardiac atrial stretch receptors (Abst.). Proc. XX Intern. Congr. Physiol. Sci., pp. 711–712 (1956)

  17. Struppler, A., Struppler, E.: Über spezielle Charakteristika afferenter, vagaler, Herznervenimpulse und ihre Beziehungen zur Herzdynamik. Acta Physiol. scand.33, 219–231 (1955)

  18. Whitteridge, D.: Electrophysiology of afferent cardiac and pulmonary fibres (abst.). Proc. XIX Intern. Congr. Physiol. Sci., pp. 66–72 (1953)

Download references

Author information

Correspondence to B. N. Gupta.

Rights and permissions

Reprints and Permissions

About this article

Cite this article

Gupta, B.N. The location and distribution of type A and type B atrial endings in cats. Pflugers Arch. 367, 271–275 (1977). https://doi.org/10.1007/BF00581365

Download citation

Key words

  • Atrial mechanoreceptors
  • Type A atrial endings
  • Type B atrial endings
  • Intermediate type atrial endings
  • Localization of atrial receptors
  • Distribution of atrial receptors