Skip to main content Accessibility help
×
×
Home

VII.—On Some Points in the Early Development of Motor Nerve Trunks and Myotomes in Lepidosiren paradoxa (Fitz.)

  • J. Graham Kerr (a1)

Extract

My main purpose in the following short paper is to publish figures illustrating some of the more important facts of the early development of myotomes and motor nerves in Lepidosiren. The bearing of some of the observations of nerve development upon current theories renders it particularly desirable that they should be illustrated by untouched photographs of the sections. A few photographs illustrating the more important stages in the development of the motor nerve trunks are given on Plate I. For the preparation of the photographs here published, as well as several others, I am indebted to the skill of my friend Dr T. H. Bryce, and of Mr Fingland, our University photographer.

Copyright

References

Hide All

page 119 note * By stage n I mean the stage represented by fig. n in my paper on the external features during development, Phil. Trans. Roy. Soc. B., vol. cxcii. p. 299.

page 119 note † Cf. Raffaele's fig. in Anat. Anz., 1900, p. 340 (Per la genesi dei nervi da catene cellulari). Cf. also Kolliker's remarks on this, op. cit., p. 511.

page 120 note * Here as elsewhere I use the word “cell” merely as a substitute for the more cumbrous expression “nucleated mass of protoplasm” without in the least implying that it is separate from its neighbours. As a matter of fact the “cells” of the mesenchyme are merely the enlarged and nucleated nodes of an irregular continuous protoplasmic spongework such as Sedgwick describes in Selachians.

page 121 note * Phil. Trans. B., vol. cxcii., pl. 10, fig. 24.

page 122 note * These have been printed as separate Plates—V. and VI.

page 123 note * Cf. Godlewski, , Arch. Mikr. Anat., Bd. lx., 1902 .

page 126 note * Were this the case, it might well be that the formation of fibrils might tend as a rule to spread from the end of the nerve from which came the most active and frequent nerve impulses.

page 126 note † Bethe, Allgemeine Anatomie and Physiologie des Nervensystems, p. 244

page 126 note ‡ Büngxer, Ziegler's Beiträge z. Path. Anat., Bd. x., 1891.

page 126 note § Wieting, op. cit., Bd. xxiii., 1898.

page 126 note ∥ This view of nerve regeneration, which my ontogenetic work inclines me towards, appears to agree most closely with that enunciated by Neumann (Arch. Path. Anat. u. Phys., Bd. clviii. p. 466).

page 126 note ¶ This protoplasmic strand within the protoplasmic sheath could only be demonstrated with extreme difficulty.

page 127 note * Op. cit., p. 238.

page 127 note † Much of the minute detail has unfortunately disappeared in the mechanical printing of these figures. I shall be glad therefore to show any specialists who are interested sun prints from the same negatives, in which the full detail is brought out.

Recommend this journal

Email your librarian or administrator to recommend adding this journal to your organisation's collection.

Earth and Environmental Science Transactions of The Royal Society of Edinburgh
  • ISSN: 1755-6910
  • EISSN: 1755-6929
  • URL: /core/journals/earth-and-environmental-science-transactions-of-royal-society-of-edinburgh
Please enter your name
Please enter a valid email address
Who would you like to send this to? *
×

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed