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

By Yasuo Harada

The body structure of the semicircular canals was once my major learn curiosity sooner than i started to review their morphology. In 1966, by using the remoted semicircular canal of the frog, i used to be capable of express that telephone 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 legislations. numerous transmitting electron microscope (TEM) experiences had already pronounced at the morphology of the semicircular canal cristae; even though, my morphological paintings was once prompted through a powerful wish to see no matter if the morphological polarity accorded to the physio­ logical polarity. In 1968 I occurred to work out the paper written by means of Dr David Lim, one in all my shut acquaintances. His findings in regards to the vestibular morphology, whilst tested via scanning electron microscopy (SEM), interested me very much as a result of 3-dimensional caliber of the micro­ graphs. This inspired me to get entangled in vestibular morphol­ ogy. firstly, besides the fact that, I confronted many issues of specimen instruction for SEM, and the 1st few years have been spent easily fixing technical difficulties, specifically 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 images nonetheless, i believe, bears comparability to the defi­ nition of these taken via the extra subtle SEM scopes at the moment available.

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Hentzer, E. (1970). Ultrastructure of the normal mucosa in the human middle ear, mastoid cavities and Eustachian tube. Ann. 0101. Rhinol. , 79, 1143 3. Lim, D. , Paparella, M. M. and Kimura, R. S. (1967). Ultrastructure of Eustachian tube and middle ear mucosa in the guinea pig. Acta Ololaryngol. (Stockholm), 63, 425 4. Shimada, T. and Lim, D. (1972). Distribution of ciliated cells in the human middle ear. Ann. Otol. Rhinol. Laryngol. 81, 203 25 a b Figure 15 Mucosa of the Eustachian tube (dog).

Rhinol. Laryngol. 81, 203 25 a b Figure 15 Mucosa of the Eustachian tube (dog). (a) Mucosa of the tympanic portion. Numerous goblet cells are seen between the ciliated cells (x 1300). (b) Mucous globule (G) is secreted from the goblet cell (x 4000) a c Figure 16 Mucosa of the isthmus (dog). (a) Dense distribution of the cilia (x 1600), (b) fine filaments are seen on each cilium (x 8000), (c) microvilli on the goblet cell (G) ( x 4800) 27 a b c Figure 17 Pharyngeal portion (dog). (a) Flat cells covered by microvilli and other cells with a few cilia are observed (x 2400), (b) Cells with long microvilli and flat cells (St) are dominant when approaching the pharyngeal orifice.

Numerous small holes are found. (x 300), (b) Sensory cilia are embedded in the hole of otolithic membrane (x 1500) 51 Figure 34 Otolithic membrane and the sensory cilia (pigeon). Some sensory cilia are embedded in the small holes of the otolithic membrane. The top of another cilia touches the gelatinous substance of the membrane. Mesh like substance, which is termed 'veil' (V) by Dohlman, extends from the microvilli on the sensory cell border to the otolithic membrane ( x 4500) 52 Figure 35 The undersurface of the otolithic membrane facing the sensory epithelia (cat).

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