Freiburger historische Bestände - digital

248

Cunningham Memoirs.

so as to cut its way into the fissure of Sylvius. Still, in many cases an
indirect communication is established between the inferior prsecentral sulcus
and Sylvian fissure. As Eberstaller has pointed out, this connexion may
be brought about in two ways, viz. by the intervention of one or other of
two furrows which he has described under the names of the inferior transverse
furrow of Rolando and the sulcus diagonalis.

Fig. 53.—Profile view of the frontal lobe of an adult female cerebrum. Drawn by tbe American apparatus
for tracing orthogonal projections of the skull. The cerebrum was adjusted in the
apparatus with its upper margin somewhat raised, in order that sulci close to the
mesial border might be brought into the sketch. The dotted connexions between
portions of the sulci indicate the position of the deep interrupting annectant gyri.

r.



. Fissure of Rolando.

F.1 .

. Superior frontal convolution.

a.



. Sulcus praecentralis marginalis.

f. m.

. Sulcus frontalis medius of Eberstaller.

P-

c. s.

Sulcus praecentralis superior.

w.

. Fronto-marginal sulcus of Wernicke.

b.



Sulcus praecentralis medius (?).

F.2 .

. Middle frontal convolution.

h.



Ramus horizontals.

F.2 s.

. Superior part of middle frontal convolution.

P-

c. i.

Sulcus praecentralis inferior.

F.2 i.

. Inferior part of middle frontal convolution.

i.

t. .

Inferior transverse sulcus of the fissure of

/•2 •

. Sulcus frontalis secundus.





Rolando (Eberstaller).

s. d. .

. Sulcus diagonalis of Eberstaller.

/•

s. .

Sulci frontalis mesialis.

s2. .

. Ramus ascendens of the Sylvian fissure.

t.

m.

Sulcus praecentralis medialis (Eberstaller).

s,1 .

Ramus horizontalis anterior of the Sylvian

/•

i

Sulcus frontalis primus.



fissure.

The inferior transverse sulcus of Rolando is a small furrow which cuts the
margin of the fronto-parietal operculum below the lower end of the fissure