On stertor, apoplexy, and the management of the apoplectic state . not reach the tongue, while the epiglottis issituated anteriorly to, and (when the animal is prone) at alower level than, the velum. Chauveau asserts % that in ruminants there is no arytseno-epiglottidean hgament. I find, however, in an analogousposition, a couple of free folds of mucous membrane(/, Figs. 3 and 4). These structures are, in life, remarkably * Comp. Anat. of Domestic Animals, Flemings translation, 1873, P- 376. . t Albrecht has suggested that it may be a vestigial homologue of the piscmeurine-bladder. Cf. Wieders
On stertor, apoplexy, and the management of the apoplectic state . not reach the tongue, while the epiglottis issituated anteriorly to, and (when the animal is prone) at alower level than, the velum. Chauveau asserts % that in ruminants there is no arytseno-epiglottidean hgament. I find, however, in an analogousposition, a couple of free folds of mucous membrane(/, Figs. 3 and 4). These structures are, in life, remarkably * Comp. Anat. of Domestic Animals, Flemings translation, 1873, P- 376. . t Albrecht has suggested that it may be a vestigial homologue of the piscmeurine-bladder. Cf. Wiedersheim, .Baudes Menschen, p. 85. Freiburg:1887. X Loc. cii., p. 462. THE ARYT^NO-EPIGLOTTIDEAN LIGAMENT. 113 loose and elastic ; they run from the lateral edges of theepiglottis along the outer sides of the arytaenoids to thebases of the same, and I conceive of them as functional inprotecting the larynx during the regurgitation of food inrumination. Turning now to the human subject, we find that, in theadult, the velum does not reach the tongue. In addition Fig. 3.—The larynx and narial pharynx in the adult sheep, seen from behind;the constrictors of the pharynx having been divided down the as for Figs, i and 2. /, Mucous fold; constrictorpharyngei muscles, cut edges of ; , posterior nares ; «., oesophagus. to its function in alimentation, the former is here animportant accessory to respiration and vocalization; andit hangs, as it were, in mid-air, ready to respond to themost delicate vibrations and other movements. I have been struck, in the course of my work, with thefact that, while much has been done with the comparativeanatomy of the adult mammalian larynx, but little attention I 114 EPIGLOTTIS OF LAMB. appears to have been paid to variations and dififerencesdue to age in any one case. In the course of my researchesinto the relative positions of the various parts concerned inthe production of stertorous breathing, I was early struckby the d
Size: 1195px × 2091px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bo, bookcentury1800, bookdecade1890, bookidonstertorapoplex00bowl
