682 STRUCTURE OF SPINAL CORD. [BOOK in. 



P.F 



FIG. 110. A TRANSVERSE DORSOVENTRAL SECTION OF THE SPINAL CORD (HUMAN) 

 AT THE LEVEL OF THE SIXTH THORACIC (DORSAL) NERVE. (Sherrington.) 1 



Magnified 15 times. One lateral half only is shewn. The large conspicuous 

 nerve-cells (drawn from actual specimens) are shaded black to render their rela- 

 tive size, shape and position more obvious ; the outline of the grey matter has 

 been made thick and dark in order to render it conspicuous. 

 A.F. anterior fissure. P. F. posterior fissure, c.c. central canal, c.g.s. central 

 gelatinous substance. A.r. anterior root, P.r. lateral (or intermediate) bundle, 

 P.r'. median bundle of posterior root of spinal nerve, _p', p" fibres of poste- 

 rior root passing p', indirectly through the substance of Rolando, p", directly 

 into grey matter, a.g.c. anterior grey commissure, p.g.c. posterior grey 

 commissure, a.c. anterior white commissure, ant. col. anterior column. 

 lat.'col. lateral column, post. col. posterior column, s.g. the substance of 

 Rolando, s. septum marking out the external posterior column or column 

 of Burdach, e.p., from the median posterior column or column of Goll, m.p. 

 cells of the anterior horn. 3. posterior vesicular column or vesicular cylin- 

 der, or column of Clarke ; the area of the cylinder is defined by a dotted line. 

 4. cells of the intermedio-lateral tract or lateral horn. 6. cells of the poste- 

 rior horn. 7. cells of the anterior cervix, y. a tract of fibres passing from 

 the vesicular cylinder to the lateral column. 



1 For this and many succeeding figures I arn deeply indebted to my friend and 

 former pupil Dr. Sherrington who has kindly prepared the figures for me from 

 his original drawings. 



1. 



