AUTHOR'S ABSTRACT OF THIS PAPER ISSUED 
BY THE BIBLIOGRAPHIC SERVICE, MAY 11 
ON THE QUESTION OF COMMISSURAL NEURONES 
IN THE SYMPATHETIC GANGLIA 
SYDNEY E. JOHNSON 
From the Anatomical Laboratory of Northwestern University Medical School’ 
FIFTEEN FIGURES 
CONTENTS 
eel troduction meeery. = see aera ee so tele od ASI ED Cs 2 erst dcponkt ete ies ae 385 
ieee Niertertallixarn came tn odsier., ss shacac aed aatese altes costes cheveverceeaetene seer aicaae ke 387 
MO Deenvationss. merswe cet een Meera mci ne iat ai dora een ckie acne ition 389 
MUOnveaneliarof mormaltVORs tie: -15% ce cece skh os De hate coat m comrae 389 
Be Onteanelia ohjoperatedinpes ys. ee Ogi. oi iis. Ai bee ath Bae Adee 391 
1. Winter frogs with spinal cords destroyed................... 391 
2. Second lot of frogs—spinal cords destroyed................. 394 
3. Third lot of frogs—spinal cords destroyed and sympathetic 
CEUTISVCI VAG CGIEAR US Sakaki Aah. skiers ciate eee aoe 397 
INES Ulnar ancduconchisionssie sa case ries take Sera ce oinie teeter 400 
Wee Diberat Ure Cibedinad teesairancis cls ates ape wate Sei aceehce shane siete aie oeeietal® arecia sreneke 404 
INTRODUCTION 
The physiological and histological work of J. N. Langley has 
lent new interest to the question concerning the occurrence of com- 
missural or intrinsic sensory neurones in the sympathetic ganglia. 
Langley’s contention against the presence of such neurones is 
supported by evidence of a convincing nature. A number of 
anatomists, on the other hand, have produced evidence of a 
strictly morphological character which stands in opposition to the 
results obtained by the author just named. Dogiel’s (’96) descrip- 
tion of two types (sensory and motor) of sympathetic nerve cells 
‘s well known. Cajal, von Lenhossék, and Huber (Jour. Morph., 
vol. 16, fig. 25, c., and Jour. Comp. Neur., vol. 7, fig. 7,'b) 
have reported finding nerve endings in the sympathetic ganglia 
which they have regarded as sensory or commissural in nature. 
1 Contribution No. 57, February 15, 1918. 
385 
THE JOURNAL OF COMPARATIVE NEUROLOGY, VOL. 29, NO. 4 
