The bi-polar cells of the spinal cord and their connections / by Fredk. W. Mott.

  • Mott, F. W. (Frederick Walker), 1853-1926.
Date:
[1890]
Catalogue details

Licence: Public Domain Mark

Credit: The bi-polar cells of the spinal cord and their connections / by Fredk. W. Mott. Source: Wellcome Collection.

Provider: This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.

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    Clarke’s column extends from the first dorsal to about the second lumbar. It is best^developed however in the lower dorsal region. A few somewhat similar cells are found in the sacral region, termed “ Stilling’s nucleus,” and a few in the upper cervical region. Drs. Gaskell and Hill believe that the homologue of Clarke’s column in the medulla is the nucleus of the spinal accessory and vagus. The cells of these “nuclei” are spindle-shaped bi-polar cells—not unhke the cells of Clarke’s column, only not so large. And as we know that the lateral horn contains similar cells, which moreover correspond in size, I should ,be inclined to believe that the larger bi-polar cells seen in vertical and transverse sections of the lateral horn in the dorsal region of the cord corresponded more closely with the cells of the vagus accessory nucleus. The homologue of Clarke’s column in the medulla is probably the “ cuneate nucleus,” the cells of which resemble in shape and size the average-sized cells of Clarke’s column. Upon this point Sherrington’^ and I concur. Dr. Alexander Bruce^ showed sections of the medulla of the fcEtus, which demonstrated that the upward con- tinuation of the “ cuneate nucleus ” was “ Better’s nucleus,” and the cells of this nucleus are in connection with the fibres coming from the semi-circular (deep) root of the auditory, the fibres terminating in this situation. The cells of Deiter’s nucleus resemble in size and shape the large cells found in the lower part of Clarke’s column, and measure fiO/i.—90/i. in their long axis. Schwalbe states that they are multipolar, and gives the measurement in their long axis as 60/“'—100/x. When these cells first begin to appear in the ascending root of the auditory nerve they are mingled with smaller bi-polar cells belonging to the cuneate nucleus. The cells of Deiter’s nucleus do not appear to me to be more multipolar in their character than many of the cells in the lower end of Clarke’s column i^ide micro-photo. 2). If these cells, which closely resemble the large cells of Clarke’s column, are connected with the deep fibres of the audi- ' Luc, cit. ® Meeting of the Physiological Society at Edinburgh, July, 1890.