Cranial Cavity Flashcards
The skull is made up of _ bones. There are _ different areas to which these bones contribute. 2 of which are the _____ and (roof/floor) of the ____ cavity.
29; 9; calvaria and floor of the cranial cavity
The top part of the skull is called the ____ and it makes up the skull cap.
calvaria
The frontal bone is separated from the parietal bones by the (coronal/sagittal) suture.
coronal
The parietal bones are separated from each other by the (coronal/sagittal) suture.
sagittal
The occipital bone is separated from the two parietal bones by the (sagittal/lambdoid) suture.
lambdoid
The floor of the cranial cavity is separated into an (anterior/superior), (middle/sub superior), and (posterior/inferior) cranial fossa. On the anterior cranial fossa there is a section called the ______ plate and ______.
anterior, middle, and posterior; cribriform; crista galli
. The sella turcica is part of the (anterior/middle) cranial fossa.
middle
The most outer layer of the cranial meninges is the (dura/arachnoid) mater, the middle layer is the (pia/arachnoid) mater, and the most inner layer is the (pia/arachnoid) mater.
dura; arachnoid; pia
The meninges are continuous with the spinal cord meninges and they are generally the same. The only slight difference is in the (dura/pia) mater. The (dura/pia) mater from the vertebral column had an epidural space filled with fat and venules and that epidural space (does/ does not) exist in the cranial meninges. The dura mater in the cranial meninges is actually fused to the ______ of the cranial cavity. So it is fused to the inner surface of the cranial cavity to the _____ layer of the bone. There is no epidural space.
dura; dura; does not; periosteum; periosteal
The cranial meninges have _ layers. Those _ layers lead to the creation of dural ___ and dural ____. The dura mater has a periosteal layer and it is right up against the bone and it has a meningeal layer. These layers are fused together except at various locations where the meningeal layer separates from the periosteal layer. And when it separates it separates to form dural ____ . The dural ____ partition (subdivide) the cranial cavity and they create venous ____ .
2; 2; septa; sinuses; septa; septa; sinuses
The first major septa in the cranial cavity is the _____. This septum’s job is to separate the two _____ hemispheres.
falx cerebri; cerebral
The falx cerebri is in the (sagittal/frontal) plane.
sagittal
The ______ is another major dural septa in the cranial cavity and it is in the transverse plane . It separates the _____ lobes of the brain from the ____ .
tentorium cerebelli; occipital; cerebellum
(Above/Below) the tentorium cerebelli is the falx cerebella. The sellar diaphragm is (on top of/below) sella turcica and covers it. By covering the sella turcica it partitions the ___ gland and actually creates a little compartment for the gland.
Below; on top of; pituitary
The falx cerebella separates the two ____ hemispheres
cerebellar
The dural venous sinuses (have valves/are valveless) and sit within the dura and most of them are between two layers of the dura and they mostly all work to drain through the _____ foramen of the skull.
are valveless; jugular
The superior sagittal sinus lies in the midline at the junction of the upper boarder of the ______. This sinus starts at the _______ anteriorly and ends at the junctional region of the _____ of the sinuses which is posterior.
falx cerebri; crista galli; confluence
The inferior sagittal sinus is on the _____. This sinus lies in the inferior free edge (not connected to the bone) of the ______ . It joins anteriorly with the ______ vein. It is getting blood from the brain through the ______ vein that is running into the inferior sagittal sinus. All that blood is running to the posterior portion of the skull through the falx cerebri where its name changes to the ____ sinus.
falx cerebri; falx cerebri; great cerebral; great cerebral; straight
The straight sinus is a continuation from the (superior/inferior) sagittal sinus. The straight sinus runs between the ______ and the ______. It is going to run and dump into _____ of the sinuses.
inferior; falx cerebelli; tentorium cerebelli; confluence
There are two transverse sinuses that emerge from the confluence of the sinuses. They travel in the ________. They are heading to the _____ foramen. In their path going there, it drops down inferiorly and after that drop off it becomes the ____ sinus. There are two ____ sinuses (one on each side).
tentorium cerebelli; jugular; sigmoid; sigmoid
The sigmoid sinus is going to join in with the _____ vein. The ______ vein starts when you cross the _______ foramen.
internal jugular; internal jugular; jugular
The cavernous sinus is the huge area around the ______. There are two cavernous sinuses, one on each side. They are going to connect to the _____ sinus via the superior _____ sinus. As soon as it joins with the ______ sinus they both dump into the _____ sinus on both sides. The cavernous sinus also connects to the sigmoid sinus via the inferior _____ sinus. It joins with the ____ sinus just as it is going to drop through the _____ foramen. So the cavernous sinus is a big venous system which has two outlets for the blood to flow to get to the _____ foramen.
sella turcica; transverse; petrosal; transverse; sigmoid; petrosal; sigmoid; jugular; jugular
The frontal lobe, parietal lobe, temporal lobe, occipital lobe, cerebellum, and spinal cord all sit in the ____ cavity.
cranial
The anterior cranial fossa is formed by the ____ plate of the frontal bone (anterior portion of it), the lesser wing of the ______ bone, and the sphenoid _____. They make up the anterior cranial fossa.
orbital; sphenoid; body
