TEMPERATURE CHANGE ON THE RESPONSE OF TASTE RECEPTORS 157 

 Table 1. Afferent fibres in the chorda tympani classified 



FROM their responsiveness TO TASTE AND TEMPERATURE STIMULI 

 TO THE TONGUE (NaGAKI, SaTO AND YaMASHITA, UNPUBLISHED). 



Types of units 



A. Units responding to taste, warming and cooling 



B. Units responding to taste and cooling 



C. Units responding to taste stimuli only 



D. Units responding to temperature change only 



Number 



14 (5) 

 10 (4) 



2 

 3 



Total 



29 (9) 



Numbers in the brackets indicate those of units, which responded 

 to thermal stimuli intensely. Twenty-four cats were used for this 

 experiment. 



.1/256 M 



quinine 



Ringer 



5 10 



Fig. 7. Impulse frequency-temperature relationships, obtained with four 

 different kinds of units. Ordinate ; number of impulses in the first second, 

 abscissa ; temperature of solutions. From Nagaki, Sato and Yamashita, 



unpublished. 



