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Article
January 1968

The Innervation of the Mammalian LungIII. Regression of the Intrinsic Nerves and of Their Afferent Receptors Following Thoracic Sympathectomy, Cervical Vagotomy or Thoracic Stripping of the Vagus

Author Affiliations

Chicago and St. Louis
From the Henry Baird Favill Laboratory, Presbyterian-St. Luke's Hospital; the Pathology Laboratory, Columbus Hospital, and the Department of Surgery, University of Chicago School of Medicine, Chicago (Drs. Hirsch, Nigro, Hamouda, and Adams); and the Department of Medicine, St. Louis University School of Medicine, St. Louis (Drs. Kaiser, Barnes, and Cooper).

Arch Surg. 1968;96(1):149-155. doi:10.1001/archsurg.1968.01330190151032
Abstract

THE MAMMALIAN lung is innervated abundantly by autonomic nerves that enter the hilus for distribution in the peribronchiolar tissues into the terminal segments of the air passages.1-3 Many of these hilar nerves have thick and thin myelinated axons, clusters of ganglion cells and unmyelinated fibers. These and other characteristics identify them as vagal. Hilar nerves, less frequent and more fibrillar, have thin and a few thick myelinated axons, unmyelinated fibers and by their structure are recognized as sympathetic. The mammalian lungs have many afferent receptors.4-7 These terminals of myelinated axons, mainly but not exclusively vagal, are recorded as (1) fiber ramifications among the lining epithelial cells of the bronchioles, (2) encapsulated or unencapsulated sessile and pedunculated receptors in the subepithelial tissues of the bronchioles, the alveolar ducts and the alveolar sacs, (3) curved segments of thick sinuous fibers with fibrils and their branches in the walls of

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