1 38 THE INVOL UNTAR Y NER VO US S YSTEM 



oculomotor nucleus, and found that contraction of the sphincter 

 muscle occurred upon stimulation of the most frontal part of the 

 nucleus. The physiological evidence thus agrees with the histolo- 

 gical, that the connector neurons of the involuntary nervous sys- 

 tem in the prosomatic region are situated close against the motor 

 neurons of the voluntary somatic muscles of the same region. 



