File:American journal of physiology (1898) (14595833917).jpg

Identifier: americanjourn01ameruoft (find matches)
Title: American journal of physiology
Year: 1898 (1890s)
Authors: American Physiological Society (1887- ) American Physiological Society (1887- ). Abstracts of papers presented at the fall meeting American Physiological Society (1887- ). Proceedings
Subjects: Physiology Physiology
Publisher: (Bethesda, Md., etc.) American Physiological Society (etc.)
Contributing Library: Gerstein - University of Toronto
Digitizing Sponsor: University of Toronto

View Book Page: Book Viewer
About This Book: Catalog Entry
View All Images: All Images From Book
Click here to view book online to see this illustration in context in a browseable online version of this book.

Text Appearing Before Image:
ic nerve of the heart, that stimulation ofthis nerve causes constructive metabolism to be induced during theperiod of inhibition, and that the heart is thus nursed into morevigorous activity. The good effects upon the heart of vagusinhibition artificially induced in the warm-blooded animals may, Ithink, be questioned. My experience with the guinea-pig wouldseem to support the view that caution should be used in drawing verydetailed conclusions with regard to specific physiological conditionsin one kind of animals from experimental work on animals very ^ Hunt and Harrington: Journal of experimental medicine, 1897, ii, p. 715. 390 D. W. Harriiigton. dififerent morphologically and, in general, physiologically. The in-frequently beating hearts of the cold-blooded frog and turtle are verydifferent in several respects from the frequently beating hearts of thewarm-blooded rabbit and guinea-pig. . The opinion that inhibitioncaused by vagus stimulation is beneficial to the heart is largely the
Text Appearing After Image:
Figure 3. Three-fifths the original size. Inhibition from stimulation of the right vagusof the guinea-pig with the secondary coil at 15 cm. Time in seconds. The line ofzero pressure is not shown. The writing-points of the manometer and of the stimulat-ing key were in the same vertical line. result of the teaching of Gaskell, but it must be remembered that Gas-kell concludes his paper ^ by stating that his observations were con-fined to the cold-blooded animals, and that he is not yet in positionto say how far, in the more highly-developed mammalia, the phe-nomena of the heart may have become changed under a greater dif-ferentiation of function, and an increased complexity of structure.Immediate supply of nutriment is a matter of comparatively littleimportance to the cold-blooded hearts; it is a matter of the greatestimportance to the very frequently beating warm-blooded hearts.The two organs of the body whose supply.of oxygenated .blood can-not be interrupted, even temporarily, withou

Note About Images