DOI Page / Citation link:
https://doi.org/10.11588/diglit.6271#0047
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Cavities. The sphenoidal pituitary sinus, which is in the
middle of the bone, has a communication with the nostrils,
and is divided by an intermediate septum;—two pterygoid de-
pressions, one between each greater-and lesser wing, for the
reception of a part of the palate-bone ;—two foramina, each
leading to a canal, called the pterygoid, or Viduan canal, in
the root of the pterygoid process, through which the recurrent
or Viduan branch of the fifth pair of nerves passes into the
cranium.—Internally. The sella turcica, or ephippium, which
is surrounded by the four clinoid processes, and contains the
pituitary gland;—two foramina optica, one before each ante-
rior clinoid process, which transmit the optic nerves;—two
grooves, one on each side of the sella turcica, between the an-
terior and posterior clinoid processes, formed by the pulsa-
tion of the carotid arteriestwo foramina lacera orbitalia
superiora, between each greater and lesser wing, through
which the third, fourth, first branch of the fifth, and the sixth
pair of nerves, and the ophthalmic artery, pass out of the
cranium ;—two foramina rotunda, for the passage of the se-
cond branch of the fifth pair of nerves;—two foramina ovalia,
for the third branch of the fifth pair ;—two foramina spinosa,
through which the spinous artery of the dura mater enters the
cranium.
Connexion. The sphamoid bone is connected with all the
bones of the cranium ; with the frontal, the ethmoid, the two
parietal, and the two temporal by harmony, and with the oc-
cipital by synostosis: it is also united to the. two cheek-bones,
the two superior maxillary bones, and the two palate-bones
by harmony, and to the vomer by gomphosis.
Use. The use of this bone is to form'the basis of the era-
mum, to concur in forming the orbits, the pituitary sinuses of
the nose, the temples, and to contain the middle lobes of the
brain.
Cavities. The sphenoidal pituitary sinus, which is in the
middle of the bone, has a communication with the nostrils,
and is divided by an intermediate septum;—two pterygoid de-
pressions, one between each greater-and lesser wing, for the
reception of a part of the palate-bone ;—two foramina, each
leading to a canal, called the pterygoid, or Viduan canal, in
the root of the pterygoid process, through which the recurrent
or Viduan branch of the fifth pair of nerves passes into the
cranium.—Internally. The sella turcica, or ephippium, which
is surrounded by the four clinoid processes, and contains the
pituitary gland;—two foramina optica, one before each ante-
rior clinoid process, which transmit the optic nerves;—two
grooves, one on each side of the sella turcica, between the an-
terior and posterior clinoid processes, formed by the pulsa-
tion of the carotid arteriestwo foramina lacera orbitalia
superiora, between each greater and lesser wing, through
which the third, fourth, first branch of the fifth, and the sixth
pair of nerves, and the ophthalmic artery, pass out of the
cranium ;—two foramina rotunda, for the passage of the se-
cond branch of the fifth pair of nerves;—two foramina ovalia,
for the third branch of the fifth pair ;—two foramina spinosa,
through which the spinous artery of the dura mater enters the
cranium.
Connexion. The sphamoid bone is connected with all the
bones of the cranium ; with the frontal, the ethmoid, the two
parietal, and the two temporal by harmony, and with the oc-
cipital by synostosis: it is also united to the. two cheek-bones,
the two superior maxillary bones, and the two palate-bones
by harmony, and to the vomer by gomphosis.
Use. The use of this bone is to form'the basis of the era-
mum, to concur in forming the orbits, the pituitary sinuses of
the nose, the temples, and to contain the middle lobes of the
brain.