63. THE MENINGES OF THE BRAIN Flashcards
How many meninges cover the brain?
Three meninges cover the brain: dura mater, arachnoid mater, and pia mater.
How do the meninges of the brain differ from those of the spinal cord?
The meninges of the brain have crucial differences, particularly in their relationship to the cranial cavity.
What is the outer meningeal layer of the brain?
The dura mater is the outer meningeal layer of the brain.
How does the dura mater of the brain compare to that of the spinal cord?
The dura mater of the brain is thicker and more fibrous than in the spinal cord.
What are the two layers of the dura mater?
The two layers of the dura mater are the periosteal layer and the meningeal layer.
What is the function of the periosteal layer of the dura mater?
The periosteal layer binds to the inner surface of the skull.
What is the function of the meningeal layer of the dura mater?
The meningeal layer forms the outer covering of the brain and folds into the dural sinuses.
What is the role of the dural sinuses?
The dural sinuses drain venous blood from the brain into the internal jugular vein.
What is the middle meningeal layer of the brain?
The arachnoid mater is the middle meningeal layer.
What is the structure of the arachnoid mater?
The arachnoid mater is a thin, clear membrane.
What is the function of the subarachnoid space?
The subarachnoid space cushions the brain and contains cerebrospinal fluid (CSF).
What does the subarachnoid space contain?
The subarachnoid space contains cerebrospinal fluid (CSF) and blood vessels.
What is the innermost meningeal layer of the brain?
The pia mater is the innermost meningeal layer.
How does the pia mater interact with the brain’s surface?
The pia mater is very thin and tightly conforms to the shape of the brain, including its sulci.
What does the pia mater contain?
The pia mater contains blood vessels and is in contact with neural tissue.
What is the function of the dura mater’s extensions?
The dura mater has extensions like the falx cerebri and tentorium cerebelli, which anchor the brain.
Where is the falx cerebri located?
The falx cerebri is located between the cerebral hemispheres.
Where is the tentorium cerebelli located?
The tentorium cerebelli is located between the cerebrum and the cerebellum.
What is the primary function of the pia mater?
The pia mater is responsible for nutrient exchange and brain perfusion.
