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Le nerf glossopharyngien considéré jusqu'à présent dans sa fonction 
essentielle comme un agent de sensibilité spéciale (sensibilité gustative), 
prend aussi une part réelle et active à titre de nerf sensitif de 
départ réflexe au fonctionnement respiratoire.” 
In 1883 KNoLL considered the N. Glossopharyngeus as belonging 
to those nerves which have always an inspiratory reflex-action on 
the respiration and several physiologists deny the gustative signifi- 
cation of the N. glossopharyngeus altogether or consider it at least 
of little importance. 
For the action of the rhythmical tongue-tractions we have to think 
of three sensible nerves, viz.: 
1. N. laryngeus superior. 
2. N. glossopharyngeus. 
3. Ram. lingualis N. trigemini. 
The first is of little importance to our purpose because on account 
of the distribution of its branches, it has the smallest chance of being 
really stimulated in LABORDE's method. Moreover it gives regularly 
a suspension of expiration under my experiment-conditions, and the 
results arrived at by means of pure chloroformnarcosis have some 
more value in this case, because the method will find its most 
important application in the chloroform-asphyxia. 
Yet it is not impossible that the N. laryng. sup. under certain 
conditions may restore the arrested respiration. 
LABORDE brought about suffocation of his animals, by closing the 
air passages completely. The respiration curve changes its character 
completely, it begins to resemble a normal curve, held upside down. 
Instead of expiratory we get inspiratory positions of rest (see curve 
XVII). It is not easy to explain this phenomenon, as it would be 
more likely that the air-resorption in lungs where the air cannot 
enter, would give mechanically an expiratory position. The craving 
for air (comp. the subjoined curve XVI) does not explain it satis- 
factorily either, as a double pneumothorax gives long positions of 
rest in expiration, interrupted by energetical inspirations. The sti- 
mulation of the N. laryngeus superior gives an arrest, generally in 
a strongly pronounced expiratory position. 
The fact is that the electric excitation of the N. laryngeus superior 
has an opposite effect, which favours expiratory positions and in 
connection with the forced inspirations may bring about rhythmical 
in- and expiration. 
Therefore it does not seem probable to me, that on account of 
the experiment of LABORDE, about which no sufficient information 
