CARDIAC INHIBITION IN DECAPOD CRUSTACEA 



169 



■v — A4 



•^- A \ - — 4-' 



.y^ — 



E 

 F 

 G 

 H 

 I 



< «'^«i|i > ' f 



^^■^^V^ ^ 



Lau>s4, 



J -.- 



K - 



N - 





> '■ " • \i * f ■ f 



■ ^ • <i'L»i>» >r ft * 



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t'im t " ' 



- V ■ i('|L < ■» < ^ > 



jajr 



Fig. 23. Inhibition of driven ganglion activity (Panulirus). Stimuli applied directly 

 to the ganglion at frequencies of 1/sec evoked a burst response, a-n, responses to 

 successive stimuli. The stimulus artifact is seen as a major break in the baseline. 

 The dot (•) indicates the first potential of the burst complex. Vertical dashes in 

 D point to the inhibitor fiber impulse in the ganglion, a-c, normal response; d-i, 

 six inhibitor stimuli at 50/sec applied to inhibitor nerve before driving stimulus 

 to ganglion; j-n, post-inhibition. Stimulating electrodes on inhibitor nerve and 

 posterior ganglion; recording electrodes on anterior ganglion (see diagram). 

 Time signal, 60/sec, spikes retouched (Maynard, 1954). 



