DOI Page / Citation link:
https://doi.org/10.11588/diglit.6271#0038
( 12 >
part transmits the blood from the lateral sinus of the dura
mater, whose course is marked by a deep groove leading to
the foramen lacerum, into the jugular vein. The portion of
'bone which proceeds backwards from the posterior clinoid
processes, between the petrous portions of the temporal bone,
is the cuneiform, or basilary process-of (he occipital bone; it
is somewhat hollowed for the reception of the medulla oblon-
gata, which lies upon it. At the bottom of this process of
bone is a considerable opening, called the foramen magnum
occipitale; it transmits the spinal marrow, the vertebral ar-
teries, and the accessory nerves of Willis; and a process of
the second vertebra of the neck lies in its anterior part. Be-
tween this opening, and the foramen lacerum in basi cranii, is
the foramen condyloideum anterius, which gives passage to the
ninth, or lingual pair of nerves. Beyond the great occipital
foramen is a crucial eminence, to which processes of the dura
mater are attached; the horizontal eminence separates the
two superior occipital cavities from the two inferior.
The skull is divided into calvaria and basis. The calvaria
comprehends all that portion situated anteriorly, about
an inch above the nose, and half an inch above the
orbits ; laterally above the semicircular ridge of the
parietal bones ; and posteriorly about an inch above
the occipital tubercle. The calvaria is the part which
is sawed off, to examine the brain after death. The ope-
ration of trepanning ntay be performed on any part of
the calvaria, avoiding, if possible, that part which lies
over the sinuses of the dura mater.
The calvaria is sometimes very thick. It is not clear
whether this be the effect of disease or not. It is,
however, very probable, that in some instances it is
the consequence of rheumatic inflammation.
The diastasis, or separation, and often the absorption, of
the bones of the calvaria, are frequently the conse-
quences of an accumulation of water within the skull ,
part transmits the blood from the lateral sinus of the dura
mater, whose course is marked by a deep groove leading to
the foramen lacerum, into the jugular vein. The portion of
'bone which proceeds backwards from the posterior clinoid
processes, between the petrous portions of the temporal bone,
is the cuneiform, or basilary process-of (he occipital bone; it
is somewhat hollowed for the reception of the medulla oblon-
gata, which lies upon it. At the bottom of this process of
bone is a considerable opening, called the foramen magnum
occipitale; it transmits the spinal marrow, the vertebral ar-
teries, and the accessory nerves of Willis; and a process of
the second vertebra of the neck lies in its anterior part. Be-
tween this opening, and the foramen lacerum in basi cranii, is
the foramen condyloideum anterius, which gives passage to the
ninth, or lingual pair of nerves. Beyond the great occipital
foramen is a crucial eminence, to which processes of the dura
mater are attached; the horizontal eminence separates the
two superior occipital cavities from the two inferior.
The skull is divided into calvaria and basis. The calvaria
comprehends all that portion situated anteriorly, about
an inch above the nose, and half an inch above the
orbits ; laterally above the semicircular ridge of the
parietal bones ; and posteriorly about an inch above
the occipital tubercle. The calvaria is the part which
is sawed off, to examine the brain after death. The ope-
ration of trepanning ntay be performed on any part of
the calvaria, avoiding, if possible, that part which lies
over the sinuses of the dura mater.
The calvaria is sometimes very thick. It is not clear
whether this be the effect of disease or not. It is,
however, very probable, that in some instances it is
the consequence of rheumatic inflammation.
The diastasis, or separation, and often the absorption, of
the bones of the calvaria, are frequently the conse-
quences of an accumulation of water within the skull ,