Meninges and Hemorrhage

If you had to manually remove blood clots from the brain, which would you rather remove subdural or subarachnoid and why?

Skull Cap

The vessels were injected with silicone. The arteries (red) via the common carotid and the veins (blue) via the internal jugular. Dura is adherent to periosteum in some places.

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Dura

There are a few tears and cuts in the dura (caused when the skull cap was being removed). Note meningeal arteries and veins in the epidural space. The superior sagittal sinus in faintly visible.

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Middle Meningeal Artery

The temporalis is reflected and the bone cut to show the left middle meningeal artery.

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Subdural Hemorrhage

The dura is cut and reflected from the left cerebral hemisphere. The blue clot of silicone represents a massive subdural hemorrhage.

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Arachnoid

The arachnoid is largely intact. It covers the gyri and sulci as well as the vessels like a blanket. The red colour is due to silicone in the subarachnoid space (representing a subarachnoid hemorrhage).

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Arachnoid

Same as above.

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Arachnoid

Same as above.

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Subarachnoid Hemorrhage and Pia

The brain has been removed from the skull. The arachnoid is removed from the frontal and part of the parietal lobe. In addition the silicone is removed from the frontal lobe. The silicone had filled the sulci in addition to covering the gyri.

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Arachnoid, Subarachnoid Hemorrhage and Pia

Close up view of the previous. Arachnoid covering the brain on the left, subarachnoid hemorrhage represented by the red in the middle and the pia covering the brain on the right. It can not be peeled off and follows all the grooves.

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Subarachnoid and Subdural Clots

Subarachnoid clots were hard to remove where as the subdural came off very easily.

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