Freiburger historische Bestände – digital

262 Cunningham Memoirs.

in front of the terminal part of the inferior frontal sulcus, Eberstaller has

Fig. 59.

Lateral view of the frontal lobe of an adult male. The outline was obtained by means of the
American apparatus for tracing orthogonal projections of the skull.

In this cerebrum the inferior frontal sulcus is evidently connected with Eberstaller's sulcus radiatus
and the so-called lateral part of the fronto-marginal sulcus. It presents, therefore, three transverse
pieces in connexion with its fore end. The hinder end of the sulcus is also directly and without
interruption joined to the vertical stem of the sulcus prsecentralis inferior, whilst the sulcus diagonalis
runs continuously into it from below.

The cruciform arrangement of the superior prsecentral and first frontal sulci is seen.

The front portion of the sulcus frontalis medius is superficially connected with, and runs in the line of,
the sulcus frontalis primus. Its place is taken by secondary transverse sulci.

Note the great development of the sulcus frontalis mesialis, and the complete manner in which it
divides the first or superior frontal convolution into two gyri.

The dotted lines indicate the position of the deep annectant gyri.

r.

Fissure of Rolando.

F.1 s.

. Upper part of the superior frontal gyrus.

a.

Sulcus prEecentralis marginalis.

F.1 i.

. Lower part of the superior frontal gyrus.

P-

c. s. .

Basal part of the first frontal furrow.

f-1 ■

Sulcus frontalis primus.

P-

c. m. .

Sulcus prsecentralis superior.

f. m.

. Sulcus frontalis medius.

P-

c. i. .

Sulcus prsecentralis inferior.

w.

. Sulcus fronto-orhitalis of Wernicke, with

h.

Ramus horizontalis.

anterior part of the sulcus frontalis

s.

d. . .

Sulcus diagonalis.

medius joined to the first frontal

Ascending limb of Sylvian fissure.

sulcus.

I>

Anterior horizontal limb of the Sylvian

F* s.

. Upper part of middle frontal gyrus.

fissure.

F.z i.

. Lower part of middle frontal gyrus.

f-

s. . .

Sulcus frontalis mesialis.

P •

. Inferior or second frontal furrow.

named the " lateral portion of the fronto-marginal sulcus." It is a small