]52 rilYMMl.oiiY OF MUSCLES AM> NKKYl -. 



admitted that in sneh cases <A<-if <'iii<'iit dors in reality 

 take place. Imt thai it is not observable on account of 

 external circumstanc ss i hindrance to tin- propa^at ion to 

 the muscle), tl'i-n t! :ceptions may be said t< be 



7n:Tely apparent. MoR-oYi-r, assuming that "the changes 

 in tin 1 strm^tli <(' the currents within the ii'-rvc mily 

 i-xrite in conseiiiii'iici' of the fact that they bring about 

 changes in the mnltrular cmiilil ion of tin- IKTVC, and 

 combining with this all that \\c km\\- of the i-tVrot of 

 other forms of nerve irritation, the following l;\v regard- 

 ing nervous excitement may he regarded as the tinal 

 result: 



Excitement of flu' nerve <!'] n</* on a c//"//;/' 1 /// 

 its molecular coiu/il !<>//. It occurs as soon * such a 



flnl il</<' /'N f'ft'l'ctl'tl H'illi xiljjif'irnt *jit>ed. 



It may be added that this law is in all essential 

 points true also of muscle. Hut it appears that, the 

 molecules of muscle are more sluggish than are those 

 of nerve, so that in the former very transient- influences 

 may more easily be without effect. 1 



1 Sec Notes and Additions, Xos. 7 and 8. 



