. Smell, taste, and allied senses in the vertebrates . Senses and sensation; Vertebrates. 28 SMELL, TASTE, ALLIED SENSES other 238 sq. mm. The more recent results of Read (1908), however, show that in man the olfactory fibers spread from the dorsal portion of the olfactory cleft ven- trally over the superior concha almost to its free edge and correspondingly over the septum to about one third its ex- tent. (Fig. 4). The antero-posterior spread of the nerve, according to this author, is about twice that of its ventral distribution on either the concha or the septum; hence the whole area innerva
. Smell, taste, and allied senses in the vertebrates . Senses and sensation; Vertebrates. 28 SMELL, TASTE, ALLIED SENSES other 238 sq. mm. The more recent results of Read (1908), however, show that in man the olfactory fibers spread from the dorsal portion of the olfactory cleft ven- trally over the superior concha almost to its free edge and correspondingly over the septum to about one third its ex- tent. (Fig. 4). The antero-posterior spread of the nerve, according to this author, is about twice that of its ventral distribution on either the concha or the septum; hence the whole area innervated by each olfactory nerve, if spread out flat, would be approximately square in outline and not far from 25 mm. Fig. 4—Olfactory cleft to & sidc, somewhat ovcr twice the of man opened by turning , , •^ t i • i ^ -t-» the nasal septum (s) up- Bxtent ascriDed to it by von iJrunn. shows the distribution of 3. Olfactory Epithcllum. The olfac- the olfactory nerve. After RMd^^ 1908, Plate 11, tory epithelium has been an object of interest to histologists for a long time. As early as 1855 Eckhard stated that in the frog it was composed of two classes of elements, long epithelial cells and nucleated fibers. Which of these served as the endings of the olfactory nerve he was imable to say. In the same year Ecker discovered on the deep face of the olfactory epithelium a third class of cells subsequently called by Krause (1876) basal cells. (Fig. 5.) These three classes of elements were identified in a number of vertebrates and described by Schultze (1856, 1862) who expressed the belief that the nucleated fibers were sense cells and represented the true endings of the olfactory nerve though he was unable to demonstrate a connection between these cells and the nerve. It is probable that the connection of the so-called. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these i
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectsensesa, bookyear1922
