( 728 ) 
electric reaction expressing himself as follows: “Während der Ermüdung 
nehmen Zuckung und Aktionstrom ab, und zwar ging die Abnahme 
der Aktionströme bei wenig kräftigen Muskeln der der Zuckungen 
annähernd parallel, wenn man die Zuekungshöhe und die electro- 
motorische Kraft der Aktionströme dem Vergleiche zu Grunde legt. 
Bei besonders kräftigen Tieren war dagegen deutlich zu erkennen, 
dass diese Parallelität keine strenge Gesetzmässigkeit darstellt, denn 
in diesen Fällen hielten sich die Aktionströme auch dann noch auf 
ihrer ursprüuglichen Stärke, wenn an den Zuckungen schon deutliche 
Ermüdungszeichen zu erkennen waren”. 
The grade-formations of the electric and mechanical phenomenon 
are not identical. It further appears that the effect of an induction 
stimulus working now and then upon the slack muscle is changeable. 
In the beginning of the process of fatigue namely the effect increases, 
to decrease later on again. This decrease in size is attended by a 
stretching both of crescent and decrescent. The electric phenomenon 
now and then yields a complicated image. Fig. 3. Already Durie *) 
knew such a complicated reaction on a single stimulus; also GARTEN, 
HOFMANN, BRÜCKE *), and Samonorr’*) have observed this in a normal 
muscle. 
It appears that in the course of a process of fatigue the proportion 
of KS > AO as to the electric reaction ofter undergoes a change, 
and that in such a way, that as a rule the difference between KS 
and AO gradually becomes smaller so that KS and AO are equal, 
which generally does not happen before every separate mechanical 
reaction of the muscle has entirely left off. It sometimes happens 
that the KS under the influence of the fatigue is in the end < AO. 
If we make experiments with rather weak currents, it may happen that in 
this way, both the electric and mechanical reaction on the opening-stimu- 
lus do not show themselves for some time, to appear again towards 
the end of the process of fatigue only with an electrical reaction. 
Some of the above mentioned facts have in passing been indicated 
by SamoLorr. These facts might be considered as the manifestation 
of an “Entartungsreaction”. In the same way the slackened crescent 
and decrescent (of the mechanical as well as of the electric reaction) 
may be looked upon. 
Further we often see that in the course of the process of fatigue 
') Durie A. Ueber die elektromotorischen Wirkungen des wasserarmen Muskels, 
Prrücer’s Archiv, Bd. 97, 1903. 
2) Bxtcxe E. Th. v. 1. c. 
3) Samoutorr A., Einige Elektrophysiologische Versuche. Le Physiologiste Russe 
1908. Vol. ¥, N°. 86—96. 
