The Journal of laryngology and otology . Fig. :H.—Horizontal .section made by Professor Thompson of the head of a chihl at birth. Thesection was cut transversely through the head at the level of the middle ear. It shows thecontinuous cavities of the Eustachian tube, the tympanum, and the mastoid antrum, i. e. thecavities included in the middle T*fc, T Fig. 4.—Dissection made by Professor Robinson showing the middle ear and its cavities, and therelation of the external auditory meatus, in a child at birth. The dissection was made bysagittal and coronal sections, removing a wedge-lik
The Journal of laryngology and otology . Fig. :H.—Horizontal .section made by Professor Thompson of the head of a chihl at birth. Thesection was cut transversely through the head at the level of the middle ear. It shows thecontinuous cavities of the Eustachian tube, the tympanum, and the mastoid antrum, i. e. thecavities included in the middle T*fc, T Fig. 4.—Dissection made by Professor Robinson showing the middle ear and its cavities, and therelation of the external auditory meatus, in a child at birth. The dissection was made bysagittal and coronal sections, removing a wedge-like portion of the face lantil the middle earcleft and the external aviditory meatus were exposed. It shows from a different point of viewthe points seen in Fig. 3, biit, owing to the oblique position of the specimen, it does not showthe whole of the mastoid antrum. Eustachian tube. Tympanic cavity, External auditory meatus, Mastoidantrum, p. Pharynx, Tympanic cavity. Plate II. T illustrate the eontinuitv of the several cavities of the middle ear. To fact- page 462, I ol. XX. Adlard ST Son, Imp. September, 1905.] Rhinology, and Otology. 46o delineates well-developed aii-cells or pneumatic spaces in a childaged five. Sappey ^ asserted in 1867 that the air-cells appearduring the course of the first year, and
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Keywords: ., bo, bookcentury1800, booksubjectear, booksubjectnose, bookyear1887
