LACRYMAL PASSAGES IN THE GUINEA-PIG AND RABBIT
1924; BMJ; Volume: 8; Issue: 4 Linguagem: Inglês
10.1136/bjo.8.4.158
ISSN1468-2079
Autores Tópico(s)Glycosylation and Glycoproteins Research
ResumoTHE guinea-pig and the rabbit are extensively used in experiments in which in the first place it is necessary to pay attention to the anatomical conditions peculiar in these two animals.Even in ophthalmology guinea-pigs and rabbits are used to a great extent when experimentally studying various problems, and thus it is not without importance for us to familiarize ourselves wvith their anatonmical structure, the more so, as the hitherto published data are inaccurate, and, being of a general nature, apply to whole animal groups, and do not regard the requirements of practice.The anatomy of thie lacrymal passages in the rabbit anid th-ie guiniea- pig constitutes one of little known departments.In comparative anatomy we find only general data relative to this subject, the rabbit being a rare exception at best, for, with regard to it, scant and scattered information nmay be found in current literature.WTallsberg01s has pointed out that in the rabbit, the pig, and the sheep, the lacrymal passages commence with one lacrymal punctum, hut in other domestic mammals with two puncta, exactly as in man.Ellenberger 21, in his "Comparative Anatomy of Domestic Animals," says that lacrymal passages commence with lacrymal canaliculi beginning in the punctum lacrimale; the canaliculi lie at the bottom of the lacus lacrimalis in the inner canthus, and not, as in man, at the top of the papillae, but at a definite distance fro'm the margin of the upper and the lower lid in the conjunctiva respectively.In the sheep the superior lacrymal canaliculus may be altogether absent; both canaliculi converge in a slight-curve downward and enter into the lacrvmal sac situateed under the'caruncle.The sac in the domestic animals is either very (indistinctly defiped, or is altogether absent.A. Chauveau(3' and S. Arloing state that, according to Charles Vogt an'd Emil Jung, the rabbit possesses only one lacryinal punctum a few millimetres distant from the edge of the lower lid (loc.cit.Vol.1I.p. 665).Schirmer, treats only of the anatomical structure in mnan, and makes no mention of the guinea-pig or of the rabbit.The most detailed; treatnme-nt of lacrymal passages in the rabbit is that by Dr. W. Krause in his book "Anatomie des Kaninchens."But the above 'descriptions do not exhaust the subject, and are ltp insufficient for an experimenter interested in the pathological physiology of thoe conjunctival sac, and of the lacrymal passages.
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