S2.B1 Meninges
Neuroscience Meninges lecture
- 1.What is most responsible for forming compartments in the cranial cavity?
- A.
Meningeal sinuses
- B.
Pia mater
- C.
Meningeal septa
- D.
Arachnoid mater
- 2.The meninges start to form during the ____ month and by the end of the ___ trimester they have an adult pattern (3 layers)
- A.
1st, 2nd
- B.
1st, 1st
- C.
2nd, 1st
- D.
2nd, 2nd
- 3.A congenital dermal sinus
- A.
Predisposes the patient to infection, because bacteria can easily get inside
- B.
Is a developmental defect associated with spina bifida
- C.
Is where the mesoderm fails to dissociated from neuroectoderm, leaving an epithelium lined channel to the surface of the skin
- D.
Results in recurrent meningitis
- 4.Regarding the ectomeninx...
- A.
It forms the dura mater
- B.
Around the brain it stays attaches to the periosteal connective tissue layer
- C.
It eventually becomes continuous with the vertebral periosteum in adulthood
- 5.Another word for dura mater is leptomeninx
- A.
True
- B.
False
- 6.List the order from outside in
- A.
Skull, periosteal dura, dural border cells, meningeal dura, arachnoid barrier cells, subarachnoid space, pia mater
- B.
Skull, pia mater, periosteal dura, meningeal dura, dural border cells, subarachnoid space, arachnoid barrier cells
- C.
Skull, periosteal dura, meningeal dura, dural border cells, arachnoid barrier cells, subarachnoid space, pia mater
- D.
Skull, periosteal dura, meningeal dura, dural border cells, subarachnoid space, arachnoid barrier cells, pia mater
- 7.Dura mater is divided into what portions?
- A.
Periosteal
- B.
Meningeal
- C.
Arachnoid
- D.
Border cell
- 8.A subdural hematoma is between the skull and the dura mater
- A.
True
- B.
False
- 9.Dural infoldings...
- A.
Are also called septa or reflections
- B.
Consist of areas in which the periosteal portion of the dura folds inward to separate the cranial cavity into compartments
- C.
Form compartments which determine how displacements can occur with injury as an expanding lesion forces areas of the brain between compartments
- D.
Include the falx cerebri and tentorium cerebelli which are considered the primary folds
- E.
Includes the diaphragma sella, which is the largest septum
- 10.Dural sinuses...
- A.
Are formed primarily by the separation of the meningeal and periosteal dura
- B.
Are arterial structures
- C.
The blood filling the dural sinuses collect from connecting veins from the cortical surgace and internal structures
- 11.The arterial supply for the dura runs between the periosteum and the periosteal dura
- A.
True
- B.
False
- 12.The brain is sensitive to pain
- A.
True
- B.
False
- 13.The anterior and middle cranial fossa are innervated by branches of which nerve?
- 14.The dura of the posterior fossa recieves sensory branches from C2 and C3
- A.
True
- B.
False
- 15.If a patient is complaining of a headache that affects the back of their head, irritation of what part of the dura is likely to be involved?
- A.
Periosteal
- B.
The dura above the tentorium
- C.
Infratentorial dura
- 16.With regards to the arachnoid mater....
- A.
It is more collagenous than dura mater
- B.
It has two primary parts, the arachnoid barrier layer and the arachnoid trabeculae
- C.
The arachnoid trabeculae help suspend the brain in the subarachnoid space
- D.
The trabeculae help reduce the weight of the brain by about 97%
- 17.Collections of arachnoid villi are called....
- 18.Explain how leukemic cells can enter the brain
- 19.Kernig and Brudzinski signs test for what?
- 20.The pia mater forms specialized attachments in the spinal cord called the denticulate ligament as well as the filium terminale externum which connects the end of the dura to the coccyx.
- A.
True
- B.
False
- 21.What is the primary enlargement of the subarachnoid space associated with the spinal cord meninges?
- A.
Cervical cistern
- B.
Thoracic cistern
- C.
Lumbar cistern
- D.
Sacral cistern
- 22.With regards to meningiomas...
- A.
They are mosr likely to arise from clusters of arachnoid cells in the villi (arachnoid cap cells)
- B.
Most likely to form at points where cranial nerves or blood vessels transverse the dura, along the base of the skull, and at the cribiform plate
- C.
They are typically benign, and rarely (atypical) malignant.
- D.
They frequently invade the brain tissue due to close proximity
- E.
The tumors typically become quite large before detected because they usually occur in the anterior fossa.
- 23.Bacterial meningitis spreads through the subarachnoid space because it's an ideal place for bacteria to live.
- A.
True
- B.
False
- 24.Viral meningitis is almost always fatal, usually causing death in 1-2 days
- A.
True
- B.
False
- 25.The ____ are connective tissue membranes surrounding the central nervous system
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