48 



DON TUCKER 



Most often the nose is left intact for experimentation with odorous 

 stimuH. In general, it is difficult to recognize discrete units in the activity 



3 V 



4^ 



5 MV 



50 MSEC 



m <*■ 



A. 



4#-« 



J V^''''"'*^----*^^ 



"^'^ "mmmrn 



10 



Fig. 3. Compound action potentials recorded from a twig of olfactory nerve in 

 response to electrical stimulation of the olfactory mucosa. Differential recording 



with d.c. amplifier. 



recorded from olfactory and vomeronasal twigs. But if the twig is suffi- 

 ciently small and the background activity is not too high, one can get 

 results such as are shown in Fig. 4. Nineteen hours later the preparation 



