Observations on the Development of the Trigeminal Nerve in the Chick (Classic Reprint) - Hardcover

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Excerpt from Observations on the Development of the Trigeminal Nerve in the Chick

The development of the trigeminal nerve has never been thor oughly studied and described. Though one of the most constant, this is also one of the most complicated nerves of the heai. Professor Minot, in his book on human embryology, says, No satis factory observations on the growth of the branches are known to me. The subgect would well repay a careful investigation, and Dr. J. B. Johnston, in his recent work on the nervous system.of vertebrates, says that, with the exception of the ciliary ganglion, the development of the sympathetic ganglia connected with the tri geminus, has not been directly followed.

The materials used in this study were chick embryos obtained from.the incubation of eggs selected without regard to breed, and the heads of adult fowls procured at the poultry house. Examina tion of transverse and sagittal series proved that the latter were, at all stages of development, the better for show1ng the trigemina us. An attempt was made to select such stages for the drawings and description as would show the consecutive changes that take place and give a connected history of the whole. The stains used were haematoxylin and eos1n for larger structures, and, for the finer ones, either iron haematoxylin or vom.rath's fluid.

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