( 933 ) 
Nevertheless in both, as well in that of the gyrus cuneus as in 
that of the gvrus lingualis, there is a stria of degeneration. 
In the medullary cone of the g. cuneus this stria is lying dorsally, 
in the direction of the dorsal portion of the cuneus. The part of the 
cone situated beneath the cortex in the f. calcarina, is wholly 
free from degeneration. 
In the medullary cone of the g. lingualis the degenerate stria is 
situated ventrally, directed towards its ventral portion and connected 
with the degenerate layer of the medullary cones of the occipital 
gyri. In the g. linguatis too, there is no degeneration in that part 
of the medullary conus, confining the cortex in the f. calcarina. 
Both lips of this fissura, are in Wricurt-PaL preparations surrounded 
by black coloured medullary cones. 
The tumour found in the left thalamus may aid us to understand 
the general view of the symptoms of disease. 
The present state of our knowledge enables us to conclude that 
the hypalgesy of the right half of the body, the loss of the deep- 
seated feeling and the false localisation on that side, the accessory move- 
ments and the ataxia of the right hand, and likewise the astereognosy 
in the vight hand are dependent on the destruction of the ventral 
and medial nuclei of the thalamus. 
The growing weakness of the right half of the body, the mono- 
tonous, stammering speech present indications of the tumour develop- 
ing frontalward, and perforating the capsula interna. 
The destruction of the left corpus geniculatum internum may 
perhaps be held responsible for the disturbance of hearing on both sides. 
Most remarkable however is the disturbance of vision in the patient, 
as the fundus does not present any abnormal condition. A superficial 
examination led to a presumption of hemiopia, but after a more careful 
investigation it became evident that, apart from a slight restriction 
to the right of both fields of vision, the patient was able to perceive 
movement and colour in both halves of the field of vision. On the 
contrary, shapes are not perceived at all in the right halves of the 
field of vision. They are recognised however in the point of fixation 
and in the left halves of the fields of vision until far towards the 
periphery. 
It ensues that these disturbances are dependent on a tumour, 
originating in the left pulvinar, which has destroyed this ganglion 
together with its medial and ventral nuclei, whilst the corpus geni- 
culatum laterale, We…rnieke’s field and the corpus quadrigeminum 
anticum were left intact by it. 
