Volume 2

Manual of human and comparative histology / edited by S. Stricker ; assisted by J. Arnold [and others] ; translated by Henry Power.

  • New Sydenham Society.
Date:
1870-73
Catalogue details

Licence: Public Domain Mark

Credit: Manual of human and comparative histology / edited by S. Stricker ; assisted by J. Arnold [and others] ; translated by Henry Power. Source: Wellcome Collection.

Provider: This material has been provided by Royal College of Physicians, London. The original may be consulted at Royal College of Physicians, London.

    544/582 (page 522)
    and connect each of them with another similar half, so as again to form one whole, the distended base, directed towards the granules of the commonly called flask-shaped body with its (probably) single process, would by its duplication repre- sent one of those vesicular forms, poor in processes, that are connected with the sensory roots in the interspinal ganglia, in the Gasserian ganglia, and in the descending roots of the fifth (see p. 448). The half which passes into the neck of the flask, that is to say, by gradual attenuation into the thick processes turned towards the pure grey layer, would, on the other hand, by its duplication, represent one of the slender forms, rich in thick processes, that form the nuclei of origin of all motor roots. The nerve cells of Purkinje would consequently (if the statements of Deiters, Koschewnikow, and Hadlich, in regard to their unbranched connection with one axis-cylinder be cor- rect) be connected by that extremity which is formed on the type of a sensory cell, with one centripetally conducting fibre, and through its branched extremity, constructed on the type of a motor cell, with several centrifugally conducting fibres. The circumstance that the smaller (poorer in fibres) restiform body passes into the posterior column of the spinal cord, whilst the far larger (more abundantly fibrous) processus ad pontem is connected with the crusta, which, on account of its origin from the lenticular and caudate nuclei, is motor, de- monstrates that in general the proportionate size of these cerebellar arms corresponds with the relative numbers of these two forms of cell processes, and supports the view that in each of the cells of Purkinje we have a nodal point which effects the looping of two tracts having different sig- nificance. 6. The Structure of the Transitional Region between the Medulla and Spinal Cord. In the formation of the anterior and posterior divisions of the medulla oblongata, the double nature of the cerebral pe- duncle, which had been foreshadowed by the separation of the chief groups of cerebral ganglia, and had become fairly