SOME THALAMIC AND CORTICAL MECHANISMS OF TASTE 311 



ties. This possibility was appealing, but did not seem compatible with the 

 fact that taste, touch, and temperature units were all found intermingled 

 in the somatic sensory tongue area in the cortex of Swedish cats (Cohen 



• TASTE o COLD 



X MECHANICAL ^ WARM 



Fig. 2. Localization of electrophysiologically isolated single neurons in the rat 

 thalamus responsive to stimulation of the tongue. Abbreviations as in Fig. 1. 



et al., 1957 ; Landgren, 1958). The thalamus of American rats proved to 

 be different, however. Frommer recorded multi-unit responses to taste 

 stimuli only in this medial location showing that taste was not coextensive 

 with the other modalities (Frommer, 1961 ; Frommer and Pfaffmann, 

 1961 ; Pfaffmann et al., 1961). The results of a single unit study shown 



