Experimental researches on the central localization of the sympathethic with a critical review of its anatomy and physiology / by B. Onuf and Joseph Collins.

  • Onuf, Bronislaw.
Date:
[Utica, N.Y.] :
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Licence: In copyright

Credit: Experimental researches on the central localization of the sympathethic with a critical review of its anatomy and physiology / by B. Onuf and Joseph Collins. Source: Wellcome Collection.

Provider: This material has been provided by King’s College London. The original may be consulted at King’s College London.

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    vi of degeneration in the intramedullary anterior roots. 13th dorsal segment showing only slight fibre degeneration in distal, none in proximal part. Examination of Nissl Specimens from the First and Third Lumbar Segments 124 The first lumbar segment showing shrinkage of cells in both columns of Clarke, more marked in the left one. The changes diminishing towards the distal end; other cell groups apparently unaltered. Examination of 3d lumbar segment negative. Recapitulation of the Spinal Degenerations Following Removal of Lumbar Sympathetic Ganglia 126 Termination of the sympathetic sensory fibres around the cells of Clarke's columns. Origin of these fibres evidently in cells of the sympathetic, not of spinal ganglion as Kolliker thinks. Ascending course of said fibres, probably in Clarke's columns. Bilateral changes of fibres and cells probably best accounted for by unintended lesion of the other sympathetic. Reasons of apparent scarcity of degen- erating fibres within Clarke's column. The degenerating fibres passing, from ventrad of Clarke's column towards the lateral horn are probably the continuation of sympathetic sensory fibres of the posterior roots. Chapter XIX.—Examination of the Spinal Cord after Ex- tirpation of Thoracic Ganglia of the Sympathetic Nerve .... 131-144 I. —Extirpation of the 6th (?), 7th. 8th and 9th Thoracic Ganglia of the Right Sympathetic Nerve together with the Inter- vening Internodial Rami and the Adjoining Piece of the Splanchnic Nerve of a Cat Six Weeks Old (Case 417). The animal sacrificed four weeks after the operation 131 Description of the operation. Findings of autopsy. Swelling of the r. 7th intercostal nerve. Examination of the Specimens Treated by Marchi's Method... 132 5th, 6th. 8th, gth and loth dorsal segments examined. No fibre degeneration traceable, evidently too late stage of degeneration for detection with Marchi, but numerous foci of diapedesis found. Examination by Nissl's Method 134 The 7th, gth and loth dorsal segments examined. Cell shrinkage in both columns of Clarke of all the perused segments, more marked on the operated side; possibly cells near the central canal and cells of the lateral horn also altered. Summary i25 Interpretation of foci of diapedesis. Reason of bilaterality of changes in Clarke's column. Intramedullary course of the fibres from the rami communicantes of the lower part of the thoracic sym- pathetic. Notes on the paracentral group and group of the lateral horn. II. —Extirpation of the 8th, gth, loth and nth Thoracic Ganglia of the Right Sympathetic Cord together with the Inter- vening Internodial Rami and the Adjoining Piece of the Splanchnic Nerve in a Cat of Five or Six Weeks (Case 415). Animal Killed Six Months after the Operation 138 Operation the same as in the preceding case. Autopsy findings. Only Nissl specimens made. Longitudinal series through the joined XI and XII dorsal seg- ments. Morphological remarks on Clarke's column. In the operated