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288

Cunningham Memoirs.

furrows are disposed in a simple manner, the hinder end of the inferior
frontal sulcus presents precisely the same relations. To show this, I
introduce a sketch of the fissures on the outer surface of the frontal
lobe of a female brain. Not only is the hinder end of the inferior frontal
sulcus seen to be placed below the sagittal part of the inferior prsecentral

Fig. 67.—Right cerebral hemisphere of an adult female.

tracing orthogonal projections of the skull,
of the deep annectant gyri.

Drawn by the American apparatus for
The dotted lines indicate the position

r.

Fissure of Eolando.

P ■

. Sulcus frontalis inferior vel secundus (the

a.

Sulcus prsecentralis marginalia.



sulcus rectus of the low apes).

s m.

. Sulcus prsecentralis medialis (of Eber-

F.1 .

. Gyrus frontalis superior.



staller).

FS s.

. Upper part of the gyrus frontalis medius.

p. c. s.

Sulcus prsecentralis superior.

F.'2 i.

. Lower part of the gyrus frontalis medius.

p. c. i.

Sulcus prsecentralis inferior (vertical

F.3 .

. Gyrus frontalis inferior.



stem).

10.

. Sulcus fronto-marginalis of Wernicke.

h. .

Horizontal ramus of the sulcus prsecentralis

s. d. .

. Sulcus diagonalis of Eberstaller.



inferior.

s1. .

. Anterior horizontal Sylvian limb.

f.s. .

Sulcus frontalis mesialis.



. Anterior ascending Sylvian limb.

P • •

Sulcus frontalis superior vel primus.

i. t. .

. Inferior transverse furrow of the fissure of

/• m.

Sulcus frontalis medius.



Eolando (Eberstaller).

sulcus, but it will be observed that the sulcus frontalis medius lies more or
less directly in the line of the sagittal portion of the inferior prsecentral
furrow. In the excellent drawing which is given by Eberstaller of a left
human cerebral hemisphere (Das Stirnhirn, p. 117, fig. 9), these relations are