SOME THALAMIC AND CORTICAL MECHANISMS OF TASTE 313 



in Fig. 2 clearly established that the taste neurons were spatially inde- 

 pendent (Blomquist, Benjamin and Emmers, 1962). The location and 

 modality identification of these single neurons are plotted on the same 



IPSILATERAL 



CONTRALATERAL 



• TASTE o COLD x MECHANICAL «> MECH & COLD 



Fig. 4. Localization of electrophysiologically isolated single neurons in the 

 squirrel monkey thalamus responsive to stimulation of the tongue. Abbrevia- 

 tions as in Fig. 3. 



standard diagrams, this time ignoring laterality. Notice that the taste 

 units (solid circles) are located medially, by themselves, while units res- 

 ponsive to mechanical stimulation or to temperature or both are mixed in 

 a more lateral location. 



The same two-stage sequence has been completed for the squirrel monkey 

 (Blomquist, Benjamin and Emmers, 1962 ; Benjamin and Blomquist, 



