Interactions between the Central Nervous System and Hormones 85 



Whether the latter conditions are influenced by hormones was not reported. 

 Hormonally-induced changes in the rabbit EEG and behavior have been 



A. BEFORE LH (5 U.) B. 10 MIN. AFTER LH C. 15 MIN. D. 17 MIN.. STANDS UP 



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a! BEFORE FSH (20 U.) B! 30 MIN. AFTER FSH C! 35 MIN. Dl 60 MIN. "^^ 



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DMT 



Fig. 5. Effects of intraperitoneal injections of LH and FSH on the EEG. Abbreviations 

 (cf. Fig. 3): OLF.B, olfactory bulb; SMA, supramammillary area; NACC, nucleus 

 accumbens; FF, fimbria of fornix; DTM, nucleus dorsomedialis thalami. From Kawakami 



and Sawyer (37). 



reported extensively by Faure (40, 41). His olfacto-bucco-ano-genito-sexual 

 syndrome has certain phases similar, if not identical, to stages in the EEG 

 afterreaction sequence. 



THRESHOLDS OF EEG AROUSAL AND EEG AFTERREACTION 



It was soon discovered that the EEG afterreaction could readily be evoked 

 in the estrous, but not in the anestrous, rabbit by low frequency (5/sec) 

 electrical stimulation of the hypothalamus or rhinencephalon (37). The 

 afterreaction often occurred too quickly to have been mediated by the release 



