Bell, Charles: The anatomy of the brain: explained in a series of engravings (London, 1802)

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EXPLANATION

OF

PLATE XII.

THIS Plate shews the Base of the Cranium, the place of the great
Arteries and Sinuses, and the exit of the Nerves from the Scull. By
comparing it with the last we shall learn the relation of the base of
the Encephalon to the base of the Scull.

a. The Frontal Sinuses.

b. b. The Cranium.

c. c. The most elevated part of the base of the Scull, formed by the

Orbital Plate of the Frontal Bones, upon which the Anterior
Lobes of the Brain, Plate XI. a. a. rest.

d. The Crista Galli of the ./Ethmoid Bone, upon which the an-

terior part of the Falx, Plate XI. b. b. takes firm origin.

e. The dura Mater turned back a little from its adhesion to the

Frontal Bone.

f. f. The acute edge of that part of the Sphenoid bone called the

Wing of Ingrassias, which enters into the Fossa Silvii. (Plate

XI. n. n.) 1

1 And the little process of the Dura Mater at this place is the Processus Spheno-
idalis.

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