276 On the Motor Functions of certain Cranial Nerves. [June 7, 

 Summary of Results — continued. 



Cranial nerves. 



XII. Hypoglossal. 



Reference. 



Hughlings Jack- 

 son, ' London 

 Hospital Rep.,' 

 toI. 1, p. 335, 

 1864. 



Hermann, loc. cit. 



Quain, loc. cit. 



V olkinann, loc. cit. 



Bastian, loc. cit. 



"Views previously 

 held. 



Denies that motor 

 fibres of soft pa- 

 late come from 

 facial nerve, and 

 supports the be- 

 lief that they come 

 from vagus, or its 

 accessory nerve. 



Muscles of tongue, 

 muscles connected 

 with hyoid bone, 

 and it receives 

 sensory fibres 

 through its ramus 

 descendens from 

 the first cervical 

 nerves. 



It supplies, alone or 

 in union with 

 spinal nerves, the 

 tongue, muscles, 

 and depressors of 

 the hyoid bone. 



As a rule no move- 

 ment in depressors 

 of hyoid, but the 

 sterno-hyoid was 

 seen to contract on 

 intracranial exci- 

 tation in two 

 calves and one 

 dog. 



Motor to tongue and 

 most of the mus- 

 cles attached to 

 hyoid bone. 



Authors' views. 



to movements of 

 the pharynx, 

 larynx, &c, as 

 stated by other 

 authors. 



Intrinsic muscles 

 of tongue of the 

 same side only. 

 Not the depres- 

 sors of hyoid 

 bone. 



