8 Transactions of the 



bute to the formation of the sympathetic nerve fibres of the nearest 



bundle. ,,',.. 



The construction of the sympathetic ganghomc bodies is most 

 distinctly seen in those of the pkxus gangliformis of the pneumo- 

 "astric nerve. Still larger in circumference than those of the 

 spinal ganglia, their capsule shows a coarser and unmistakable net- 

 work, the meshes of which attain a diameter of about yi o mm. or 

 more! The ganghonic bodies which lie, mostly in the form of 

 oblonrr groups, between the dark-bordered fibres of the nerve, are 

 here also connected with each other by the reticulated plexus of 

 their capsules. Thus far I have not succeeded in discovering on 

 these bodies more than one process piercing the capsule. This 

 arises generally in the long axis of the nerve, and is, after a course 

 of about iV mm. or more, transformed into a dark-bordered nerve 

 fibre. As in the sympathetic ganglionic bodies before described, a 

 considerable number of fine fibrillae arise here also from the net- 

 work on the outer surface of the capsule, a portion of which sur- 

 round the axis cyhnder, and unite finally to form sympathetic 

 nerve fibres, while the rest, in the form of a plexus, establishes a 

 communication with the adjoining capsules. 



In reviewing the above-described construction of the sympa- 

 thetic ganghonic bodies, it will at first appear more complicated 

 than that of those of the central organs. By a closer examina- 

 tion, however, this seeming complication disappears, and a certain 

 analogy of their component parts, especially with those of the 

 cortical layer of the brain, may be recognized. The ganglionic 

 bodies of the cortical layer of the cerebrum, namely, send out some 

 processes, the lateral and basal, the axis cylinders of which are 

 transformed into dark-bordered nerve fibres, while the ramifications 

 of another, the pointed process, terminate directly in the terminal 

 fibrinous network, the meshes of which are filled up by small 

 elementary granules. Directly from this network, as I have shown 

 above, another set of very fine nerve fibres arises, which also pursue 

 their course toward the periphery. In the cortex of the cerebellum 

 we meet the same arrangement ; the ramifications of the enormous 

 processes of the ganglionic bodies of Purkinje, namely, terminate 

 in the network of the grey layer, while their small hasal processes 

 are transformed into dark-bordered nerve fibres, which finally 

 form a part of the white substance. From the terminal network of 

 the grey layer, the same as in the cerebrum, a considerable numljer 

 of fine fibrillae arise, which subsequently form the axis cylinders of 

 dark-bordered nerve fibres, a part of which pass around the sulcus 

 to a neighbouring convolution, in order to form a communication 

 between the nervous elements of two adjoining convolutions, while 

 the rest proceal to the white substance. 



