Freiburger historische Bestände - digital

24

Cunningham Memoirs.

hemispheres have, in all probability, been produced by a retention of the
transitory fissures; and it would be a matter of high importance if we
could prove that pressure continuously applied to the head of the early
foetus would lead to the preservation of the temporary furrows. At the
same time I am very doubtful if external pressure has had anything to do
with the continuance of the temporary furrows on the mesial face of this
brain. If the figures which accompany Zuckerkandl's Paper be correct
the posterior part of the corpus callosum is absent, and the abnormal
arrangement of the fissures on the inner surface of the hemispheres is
more likely to be associated with this condition. This is rendered all the

Fig. 8.—Abnormal brain figured by Zuckerkandl.

more probable from the fact that it is in the back part of the cerebrum
that the departure from the normal arrangement is most strongly
accentuated.

One other example of what appears to me to be a retention of the
early transitory fissures I may be allowed to give. It is in the brain of a
Cretin, the photograph of which Professor Victor Horsley has been so good
as to place in my hands. This I have reproduced in the accompanying
figure (fig. 9). Unfortunately there is no history of the case. The only
information which we have of it is that furnished by the photograph. We
cannot tell, therefore, whether the corpus callosum was properly developed