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VETERINAEY PHYSIOLOGY 



is supplied by the auriculo-temporal division of the fifth and 

 also by sympathetic fibres (fig. 154). 



The influence of these nerves has been chiefly studied on the 

 submaxillary and sublingrual glands. 



It has been found that, when the lingual nerve is cut, the 

 reflex secretion of saliva still takes place, but that, when the 

 chorda tympani (Ch.T.\ a branch from the seventh nerve 

 which joins the lingual, is cut, the reflex secretion does not 



Par 



FIG. 154. Nervous Supply of the Salivary Glands. Par., parotid, and S.M. 

 and S.L., the submaxillary and sublingual glands; VII. , the seventh 

 cranial nerve, with Ch.T., the chorda tympani nerve, passing to L., the 

 lingual branch of V., the fifth nerve, to supply the glands below the 

 tongue, T. ; IX., the glossopharyngeal giving off J. N. , Jacobson's nerve, 

 to the 0., otic ganglion, to supply the parotid gland through Aur.T., 

 the auriculo-temporal nerve. 



occur. Stimulation of the chorda tympani causes a copious 

 flow of watery saliva, and a dilatation of the blood vessels of 

 the glands. If atropine has been first administered the 

 dilatation of the vessels occurs without the flow of saliva. 

 This indicates that the two processes are independent of one 

 another. The secreting fibres all undergo interruption before 

 the glands are reached ; the fibres to the sublingual gland 

 having their cell, station in the submaxillary ganglion (S.M.G.), 

 the fibres to the submaxillary gland having theirs in a little 



