847 
is reduced to almost half its normal size!), but So its cauda the small dorsal 
ant the large ventral cells (s. flg. 6) are completely intact ; there too the striae 
medullares as well as the proper capsule are on the whole untouched. 
The conclusion is readily made: the possibility of sight in the 
upper quadrants is due to the conservation of the cells and fibres 
in the cauda of the lateral geniculate body, their projection on the 
cortex being preserved by the ventra/ layer of the area of WERNICKE 
and of the geniculo-cortical radiation. 
But where do these cells find their projection on the cortex? Not 
in the occipital pole which in my opinion was totally separated 
by the focus from the lateral geniculate body, as is shown by the 
complete degeneration of the stratum sagittale externum and all the 
medullary cones of the oecipital convolutions (only fibrae arcuatae 
remained). Perhaps from the gyrus occipito-temporalis, its medulla 
being bui partly cut through by the focus (s. fig. 7). Distally from 
it (s. fig. 9) the medullary cones of the temporal circouvolutions 
were normal, those of the occipital lobe (s. fig. 9) were degenerated. 
Proximally from it this convolution with normal medullary cone 
contributed to the forming of the intact ventral division of the strata 
sagittalia. 
The answer to the question where the field of projection of the 
lateral cells of this body was situated, was brought to me by a very 
remarkable right hemisphere, given to me by Professor Bork. He 
had found it by accident in the corpse of a woman of whose ante- 
cedents nothing was known. 
EE. 
This right hemisphere carries the rests of a very old pathological process, which 
has reduced on the transition of the basal temporal and occipital lobe all the 
convolutions with their medullary cones to a thin membrane. When the pia mater 
was removed it was torn near the cuneas. (s. fig. 11). The occipital pole is intact. 
On the middle of the cuneus the defect begins with a sharp edge. The proximal 
end of the cuneus, of the gyrus lingualis and of the gyrus fusiformis, as well 
as the medial part of the gyrus occipito temporalis (as far as near to the f. rhinica) 
ave replaced by a thin membrane (s. fig. 11, 13, 14, 15 and 16). 
The series of sections show the following”). The first remarkable alteration is 
drawn in fig. 16 (pointed out by the line 16 on fig. 11 and comparable with 
fig. 9 of the first observation). Thrice the distal end of the defect has been cut. 
firstly in A in the depth of the fiss. calcarina. There the cortex is gone and the 
1) The enlargement is similar to that of the normal figure. (s. fig. 3). 
*) In order to give an easy survey the sections are reversed and drawn as if 
they came from a left hemisphere. 
