Die Beziehungen Der Tranenorgane Zur Nasenhohle Und Zu Ihren Nebenhohlen

Die Beziehungen Der Tranenorgane Zur Nasenhohle Und Zu Ihren Nebenhohlen

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1913 edition. Excerpt: ...7mm and by Henle to be 7 to 9mm. lts lumen measures 0'5 to 1'5 mm. Sappey, Foltz, Hyrtl and Lesshaft thought that a conjoined termination of the lachrymal canals was the normal state of matters, but Henle (4) and others have held that a separate termination is the rule, ---or is more frequent at least. Lesshaf t, however, encountered a separate opening in only 3 out of 112 instances. Cases of duplication of the lachrymal canals and of the puncta lacrimalia have also been recorded (Foltz, Weber, Graefe, Bochdalek)--two and even three puncta in one eyelid with supernumerary lachrymal canaliculi which sometimes united and sometimes opened independent of each other into the tear-sac. A blind canal, 2mm in length, has also been described (Bochdalek, Graefe). Finally, absence of the puncta and lachrymal canals has been observed (Emmert, Magnns, Zehender, Burnett, v..Reuss, Wicherkiewicz). The existence offo lds has been reported; thus Lesshaft observed a transverse plica in the common canal; Vlacovich found longitudinal and oblique folds which ran the whole length of the canal, and Hyrtl claimed that he had seen a spiral fold. Merkel and Walzberg have thrown doubt upon these spiral folds. The lachrymal sac (tear-sac), saccus lacrim alis, occupies the lachrymal fossa. Its medial wall is inseparable from the periosteum and its lateral wall is bridged over by orbital fascia stretching between the anterior and posterior lachrymal crests. The wall of the lachrymal sac is adherent to the limbs of the medial (internal) palpebral ligament. Those parts of the sac left bare by the ligament are covered by fibres of the orbicularis palpebrarnm and by skin. The lachrymal sac measures 12 mm vertically and 2 to 3 mm transversely. Its superior rounded...show more

Product details

  • Paperback | 46 pages
  • 189 x 246 x 3mm | 100g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236795288
  • 9781236795281