Archives of neurology and psychopathology. . ne case of the seventh (or sixth ?) to theninth, in the other of the seventh to the eleventh thoracicsympathetic ganglia, in young cats, we concluded that onthe whole, the fibres, at least the afferent—probably alsothe efferent—coming from the ganglia of the lower half ofthe thoracic sympathetic cord, take a rather horizontalcourse in the spinal cord to become connected with spinalcells of the same level, but that part of these fibres prob-ably descend either in the spinal cord or sympatheticnerve through the distance of one or more segments, be-for
Archives of neurology and psychopathology. . ne case of the seventh (or sixth ?) to theninth, in the other of the seventh to the eleventh thoracicsympathetic ganglia, in young cats, we concluded that onthe whole, the fibres, at least the afferent—probably alsothe efferent—coming from the ganglia of the lower half ofthe thoracic sympathetic cord, take a rather horizontalcourse in the spinal cord to become connected with spinalcells of the same level, but that part of these fibres prob-ably descend either in the spinal cord or sympatheticnerve through the distance of one or more segments, be-fore reaching the cells around which they terminate orfrom which they originate if it be efferent fibres (seeText-Figure 11). Extirpation of the stellate ganglion causes within a fewmonths retrogressive changes of an atrophic order in thecells of both lateral horns, of both paracentral groups and RECAPITULATION OF THE RESEARCHES. 191 of both columns of Clarke. These changes extend down-ward at least to the ninth dorsal segment showing that. Text-Figure ii.—Diagram showing the afferent fibres derived from the?tellate ganglion and lower thoracic sympathetic chain in their course to thespinal cord 1 he course is suggested by the degenerations following removalof the stellate ganglion and also the lower thoracic sympathetic chain. Theefferent fibres very likely have a similar course in opposite direction. post. //.—Posterior horn. ant. //.—Anterior horn. r. w» ventralis (anterior division) of dorsal dorsalis (posterior division) of dorsal R.—Anterior comm.—Ramus communicans. I92 EXPERIMENTAL RESEARCHES ON THE SYMPATHETIC. many of the afferent and also of the efferent fibres from thestellate ganglion probably make along descent in the cord,or possibly in the sympathetic nerve, becoming connectedpartly with the same cells with which the fibres from thelower portion of the thoracic sympathetic cord enter con-nections. We may
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