Innervation especially sensory innervation of dog tongue.

(Received for publication, July 21, 1952) Many histological studies1),2),3) on the innervation of mammalian tongues have been reported and praiseworthy results achieved histherto, but much seems yet left unexplored, and in particular, many questions are still waiting solution in connection with dog tongue. Recently, much licht has been thrown on the subject of innervation of human tongue by the minute studies by Kumagawa,4) Nakayama,5) Inazawa6) and Ohgaki7) of this laboratory. So, I took the tongues of dog as my material, and through a thoroughgoing histological study on its innervation, especially sensory innervation undertook to elucidate its biological meaning, in comparison with the innervation of adult human tongue. The materials were taken from fresh adult dog tongues, which were fixed for a long time in 10% neutral formol, cut into 40 ,u frontal frozen sections, and stained with Seto's silver method in use in this laboratory. The series of beautiful stained preparations I subjected to a minute micro scopic scrutiny and succeeded in arriving at many new informations as described in the following.