Diseases of the upper respiratory tract : the nose, pharynx and larynx / by P. Watson Williams.

  • Williams, P. Watson (Patrick Watson), 1863-1938.
Date:
1901
Catalogue details

Licence: In copyright

Credit: Diseases of the upper respiratory tract : the nose, pharynx and larynx / by P. Watson Williams. Source: Wellcome Collection.

Provider: This material has been provided by The University of Leeds Library. The original may be consulted at The University of Leeds Library.

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    pass through the cribriform plate from the olfactory cells of Max Schultze, from which the fine terminal filaments pass through the external limiting membrane of v. Brunn to lie between the columnar epithelial cells. The olfactory nerve fibres represent the axones of the olfactory cells, and are non-medullatecl. Von Brunn showed that the olfactory area of the nasal mucous membrane is restricted to a small area covering the superior turbinal, the adjacent part of the septum and nasal roof, the whole area occupying about six square centimetres. {b^j Ordinary .sensation by ethmoidal branches of the fifth nerve from Meckel's ganglion and the superior maxillary, etc. (6-,) The arterial supply to the mucous membrane and to the erectile tissue of the turbinated bodies is controlled by vaso- motor nerves from Meckel's ganglion, and is under the control of the vaso-motor centres in the medulla, where there is ]3robabl\- a connection with the nuclei of the vagus through association fibres, a physiological connection which has an im- portant bearing on the pathology of various neuroses, as for instance the cases of asthma associated with nasal disease. I would especially direct attention to Cajal's observation that a few of the collateral fibres from the gelatinous substance of Rolando, which is the receptive nucleus of the trigeminus in the medulla, break up under the motor nuclei of the facial and vagus, and the inference is they communicate (Golgi method). Also in the mouse Cajal figures collaterals from the sensory ganglia in the substance of Rolando: the descending root of the fifth nerve terminates by arborisation in the substance of Rolando, and from the cells of the substance of Rolando axones arise which terminate in the nucleus ambiguus of the same side and in that of the opposite side. As a further indication of the physiological association existing between the several portions of the respiratory tract, it is worthy of note that Spencer, corroborating and extending Monk's observations, has demonstrated experimentally the influence of the nasal area, and, in less degree, of excitation of other sensory areas, on normal respiration. He found that four different results were eacli obtainable from a distinct area on the cortex ; all the results being such as can be produced upon Fii;. 13. Seciioii of the n.'isal mucous mcmbrane'shoH'ing the olfjiciury ceils of M.-ix Scluilizi?. (After ZuLKER- KANIJI..')