SINGLE SYNAPSE: TWO NEURONS 



47 



6 = 



1- R 



1 - e* rT 



-brT 



-uT 



R 



o-bT 



(17) 



Equation (17) gives a relation between the relative net excitation 8 , 

 the fraction r of time of stimulation, and the frequency / = 1/T . For 

 / = o , 6 = 1 f or all r . But for / = oo , 6 = r . Furthermore, 6 in- 

 creases with / for small / and the height is greater for small r . The 

 type of relationship between and / for various values of r is shown 



m 





e 



