EXPERIMENTAL STUDIES OF PARALYSES IN DOGS 
AFTER MECHANICAL LESIONS IN THEIR SPINAL 
CORDS WITH A NOTE ON ‘FUSION’ ATTEMPTED 
IN THE CAUDA EQUINAS OR THE SCIATIC NERVES 
HENRY O. FEISS 
From the H. K. Cushing Laboratory of Experimental Medicine, Western Reserve 
University 
TWENTY-SEVEN FIGURES 
CONTENTS 
[trot PRO CIO ta A ia igsG ah we bab Bhar ba aE ere ic ah Big es Gea chs oh ae san gts oe eu iene ag erica 100 
JRGRINCIMEL NOI HCV) TROSTOCUAClN ay nc Gus oe Da oe Pe ae aadre cues dato ememenduE Sooner 100 
SEDER WLOCUCTIONAO! une Le SION wey Ne Aso eer Abe Ghani: sish-ceyt acai 101 
Method of studying the surviving aMintals). 2.092 44sec cu soo gore 101 
SEMA Gre aIlt OPS WTA A LEI Al cr ped Oe, cha he cea ott ete eels ah 4 fae ancients eae 102 
Part 1. Clinical improvement after the production of the lesion in relation 
‘0 the histological findings at different stages....* ..4.........---+--5---:- 102 
Gharacversotche clinicalmmprovementemen=.— oes eee eee aac 103 
Espolomical simamanyan ces. 2. 2: «- Se e an e em etnies aeerero or eles, 2 103 
limerencesmirommoheEaboOviesteuecn |... eeeece conce are hia os =o 104 
Bearings of above inferences on infantile paralysis..................... 105 
Part 2. The localization of centers in the lumbo-sacral cord. .............. 106 
IM etdavarel @n Siiioly Bune) REAR ONIN bbs o6 ccc uSsucnoaeuosuboubobonouHuoUOOEC 106 
Inferences from the individual experiments: summary............-.-.+-- 107 
Correlation of data derived from individual experiments................ 109 
AEE Controlcos(OMlsetRCeteT a: ae eer aera eer ee ees sys mera 109 
i Bicgel <0i Lev (ol 0 se cage ae ene A 2°? 22! Si ee eRe 109 
GO Sensationes - ca toee oe he ee ree nas OME Ok pawns esa plan 109 
Dae Atriailiene Hex si75 sn ne. aces a eee elie sks ce nomen 109 
BeControlyot sphimcters.< 4.5, yas r pa sete orate ne ny eae 109 
Ha CON CIUSTONE see src Aer eR Re Ne Bisce, Spc n nse Oise 110 
Comparison of inferences with current views on the subject............ 110 
Significance of cell-groups in grey matter of the spinal cord............ 113 
Part 3. Nerve fusion attempted in the caudas and the sciatic nerves in ani- 
mals paralyzed by mechanical lesions in the cord......................++ 113 
RTE inns OLAUHeT PLOCE GUILE: pcr. to nO Ebr renee 2 ec cr2 sSar).a: « raves oo Sle Sieh 113 
We MME NL AMC a GALe a. n10e Wace parse een eee oie te See cuca soe Bis iw a coleta ace Sibel 114 
IDASOUS ORS SS Cte se SOE AE SOS 115 ble bot dhowma gt G0 /c..5 cho nerd aes caer pearl Oi Pesan thee 117 
99 
THE JOURNAL OF COMPARATIVE NEUROLOGY, VOL. 22, NO. 2 
APRIL, 1912 
