Freiburger historische Bestände - digital

284

Cunningham Memoirs.

inferior frontal furrow, but merely a fissure dividing the middle convolution
into an upper and a lower part.*

Schwalbet and Mingazzini^: divide the outer surface of the frontal lobe
into an upper and a lower area by the horizontal limb of the sulcus arcua-
tus and the sulcus rectus, both of which together, in their opinion, represent
the sulcus frontalis primus in man.

The most recent hypothesis which has been pat forward on this question
is that which has been elaborated by Eberstaller§ and Herve\|| I shall not
attempt to go into the question of priority. Waldeyer^f has stated the case
briefly and very fairly. I shall merely say that the theory, as it is represented
to us by Eberstaller, is one which has been worked out with the
greatest care, and rests upon a very different basis from same hypothesis
as it is presented to us by Herve\ Waldeyer remarks : " Die Feststellung
dieser Homologie gebuhrt, so wTeit ich sehe, vor Allem Eberstaller." I
would endorse this statement if I were able to accept the hypothesis.
Both authors virtually arrive at the same conclusions. These, as expressed
by Eberstaller, may be stated briefly thus :—

1. The sulcus rectus represents the sulcus frontalis medius in man.

2. The sulcus arcuatus is the homologue of the sulcus prsecentralis
inferior in man.

3. In many of the lower apes the sulcus frontalis primus is present in
the form of two or three shallow furrows which are placed between the
horizontal part of the sulcus arcuatus and the mesial border of the hemisphere
. The hindermost of these, if transverse in its direction, may represent
a sulcus prsecentralis superior.

* It may be well to mention that Bischoff did not always hold these views. In his earlier
and greater work ("Die Grosshirn-Windungen des Menschen," Abh. d. 2. CI. d. k. Akad. der
Wiss., x. Band, 2. Abth., p. 460), he expresses himself very differently.

\ Lehrbuch der Neurologie. Erlangen, 1881.

J Intorno ai solchi le circonvoluzioni cerebrali dei primati et del feto umano. Estratto dagli
Atti della B. Accad. Med. di Boma, 1888, vol. iv., serie ii.

§ Das Stirnhirn. Leipzig, 1890.

|| La circonvolution de Broca. Baris, 1888.

Das Gribbon-Hirn. Internationale Beitrage zur Wissenschaftlichen Medicin. Virchow's
Festschrift, Band i., p. 35.