Clinical tuberculosis . or the most part, the ganglia of the vegeta-tive system. Some of the neuroblastic substance, however, is de-posited in other jdaccs, and this is known as chromaffin tissue;because, when stimulated, it secretes a material which stainsbrown with chi-onie salts. Physiologically, we know this secretedsubstance as .adrenin or its immediate precursor. The cells which migrate from those portions of the centralnervous system which give origin to Ihc i))athctic fibers? do not come to rest until they are situated in the walls of theviscera to be innervated by them. Here t
Clinical tuberculosis . or the most part, the ganglia of the vegeta-tive system. Some of the neuroblastic substance, however, is de-posited in other jdaccs, and this is known as chromaffin tissue;because, when stimulated, it secretes a material which stainsbrown with chi-onie salts. Physiologically, we know this secretedsubstance as .adrenin or its immediate precursor. The cells which migrate from those portions of the centralnervous system which give origin to Ihc i))athctic fibers? do not come to rest until they are situated in the walls of theviscera to be innervated by them. Here they form ganglia andthrow out their processes which become motor and secretory arc connected with the central nervous system by connectorfibers belonging lo tiic j)arasytnpathetic system, as illustrated inPlate T from (iaskcll, wliich i-iin from llic centers in the cranial,bull)ar, and sacral ])ortions of the central nervous system di-rectly to the ganglia in the walls of the viscus supplied. There DNX DNX. B X Y M A Plate I.—The Reflex Paths in the Bulbar Region. (Green—Sensory nerve; receptor neuron. Black—Connector —Motor nerve; excitor neuron.) A. Of the Somatic System. The afferent neurons run in the fifth nerve, V, their cells lying in the gasserianganglion. CG. These connect with the connector neurons lying close against thedescending root of the fifth nerve, DSV. The connector neurons in their turnconnect with the excitor cells which lie in the nucleus of the twelfth nerve, NXIl. B. Of the Splanchnic System. The receptor neurons run in the tenth nerve, X, with their cells lying in theganglion of this nerve, VG, and connect with connector neurons which lie inthe dorsal nucleus of the vagus, DAX. Processes of the connector cells con-nect with the excitor neurons which lie in the nucleus ambiguus, NA, their proc-esses form the motor part of the tenth nerve. C. Of the Involuntary System. The receptor neurons run on the tenth nerve, X. with thei
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