747 
Such an extent is now the same as Mrrrens could preparatorily 
ascertain as the norm for the trunk-dermatome of man. 
The trapezium-shape answers likewise to the anatomical dermatome : 
all these proportions consequently plead strongly for the fact that 
my method is superior to the usual isolation methods, and strengthen 
the view, that the strychnine-segmentzone represents in fact the whole 
rootfield: the theoretical dermatome. If this is so indeed, we may 
likewise conelude that W. and v. R’s view, that the central area 
and the whole dermatome have the greatest width in the lateral part, 
is not correct, but that the greatest width is reached at the v.d. ©. 
At last we can try, by a comparison of the dimensions of the 
zones which we have found, to get an insight into the overlappings 
of the rooi-fields. With a view to this I begin to represent here all 
the dimensions found by me in a table likewise indicating those of 
the areflectory zone of the left side, situated between the isolated 
Eh:*VET and, Th. XI. 
| ee ie ik pape nie 
| Width | d.d. dine | ee v.d. 
Strychnine- «_inner-zone | 30 30 5 |, ees 
segmentzone cranial outer-zone Bear 7 1D ef dl 
of Th. VIII. | caudal outer-zone | 3 isu | ie Perel 
Total width of the strsegm.zone | 35 | 50 | 50 | 54 
Areflectoric | | 
man 1S PB he ig 10 
Strychnine- ‚ inner-zone (32-34 | 28 | 26 16 
segmentzone | cranial outer-zone | gba i | LA Ot 
of Th. XI | caudal outer-zone Ús 10 es 12 ee 
Total width of Th. XI ae 55 | 53 | 49 
| 
Strychnine- | - | | 
segmentzone (total widthofthezone, 30 | ? | ? | 48 
of Th. Vib: | | | | | 
| 
1) Compare: V. E. Mertens. Ueber die Hautzweige der Intercostalnerven. Anatom. 
Anzeiger Bd. XIV. S 74 Jena. 1891. MerveNsS describes here the extent ia. of 
the 4th intercostalnerve of man. He found: that the zone provided for by it: .. . 
“sich über drei Intercostalriume, und ebensoviel Rippen erstreckte, und zwar 
begann es mit dem dritten Intercostalraum, und endete auf der sechsten Rippe”. 
