1 1 INNERVATION. [CHAP. XIX. 



We may then conclude from human and comparative anatomy, 

 from experiment and pathological states, that the ninth nerve is the 

 motor nerve of the tongue. Its anastomoses with the vagus, and 

 with the fifth, make it probable that it contains some sensitive fila- 

 ments, and this is confirmed by experiments which shew that some 

 sensibility is possessed by the nerve, and that this is greatest the 

 nearer we approach the tongue. But that it has 110 influence upon 

 taste or upon the common sensibility of the organ, is proved by the 

 unimpaired state of both those powers, after complete section of 

 the nerve. 



In addition to the principal systematic works on physiology, reference 

 may be made to Valentin, de Functionibus Nerv. Cerebr. ; the Papers of Sir 

 C. Bell, collected in an octavo volume, 1844; Mayo's papers in his Anat. and 

 Physiol. Commentaries, and his Physiology; Longet, sur le Systeme nerveux. 



