Read e-book online Atlas of the Ear: By Scanning Electron Microscopy PDF

By Yasuo Harada

ISBN-10: 9400965982

ISBN-13: 9789400965980

ISBN-10: 9400966008

ISBN-13: 9789400966000

The body structure of the semicircular canals was once my major study curiosity sooner than i started to review their morphology. In 1966, by using the remoted semicircular canal of the frog, i used to be in a position to convey that phone task within the horizontal semicircular canal has the other polarity to that during the vertical canals, which was once the 1st physiological facts of Ewald's legislation. a number of transmitting electron microscope (TEM) reports had already mentioned at the morphology of the semicircular canal cristae; despite the fact that, my morphological paintings used to be prompted via a robust wish to see even if the morphological polarity accorded to the physio­ logical polarity. In 1968 I occurred to determine the paper written through Dr David Lim, one in all my shut acquaintances. His findings about the vestibular morphology, whilst tested through scanning electron microscopy (SEM), interested me very much as a result third-dimensional caliber of the micro­ graphs. This inspired me to get entangled in vestibular morphol­ ogy. at first, even though, I confronted many issues of specimen guidance for SEM, and the 1st few years have been spent easily fixing technical difficulties, particularly these of artifacts. a number of the figures during this booklet were photographed with a JEOL JSM U-3 scanning electron microscope over a decade. The sharpness of those photos nonetheless, i feel, bears comparability to the defi­ nition of these taken by way of the extra subtle SEM scopes at present available.

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The function of the otolithic organs The otolithic organs perceive gravity, linear acceleration and centrifugal force, thus affecting the muscular tonus of the body, extremities and ocular muscles and influencing positional sensation of the body. As an effect, the posture and smooth movement of the body are maintained. Historically, Breuer (1874) first reported that otolithic organs were stimulated by linear acceleration and postural change. Mach (1875) reported some changes of the sensations under linear acceleration.

Marco, J. Fernandez, S. and Romar, R. (1971). Ultrastructure of the otoliths and otolithic membrane of the macula utriculi in the guinea pig. Acta Otolaryngol. (Stockholm), 71, 1 10. Vilstrup, T. (1951). On the formation of the otolith. Ann. , 60, 974 11. Wittmaak, K. (1956). Die Ortho und Pathoviologie des Labyrinthes. (Stuttgart: Georg Thieme) 49 b Figure 32 Figure 33 High magnification of Figure 32A (x 30000) Figure 32 Saccular otolithic membrane (frog). (a) Surface of the otolithic membrane.

I 978c). Metabolic disorder of otoconia and the vestibular dark cells. , 37, 1 4. Vilstrup, T. (1951). On the formation of the otoliths. Otol. Rhinol. Laryngol. St. Louis, 60, 974 Figure 36 X-ray microanalysis of the undersurface of the otolithic membrane (cat). (a) A peak, which derives from the large global substance, is recognized. It is also revealed that these structures contain approximately 20% calcium which is half of the normal content of otoconia (x 4000), (b) The global substance and the granular products in (a) turned into white dotted image by plane analysis, indicating high calcium concentration (x 4000) 54 a Figure 36 55 a b Figure 37 Calcium analysis of the utricular sensory epithelium (cat).

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Atlas of the Ear: By Scanning Electron Microscopy by Yasuo Harada

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