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Med Neuro Lect10

Med Neuro Lect10 Epidural Hematomas

QuestionAnswer
Does the outer dura, creating the periosteum, cover the inside or outside of the calvarium? BOTH
Damage to which arteries will create an epidural bleed Ant, Mid, Post Meningeal Arteries.
Where does an epidural hemorrhage occur? B/w the inner table of the calvarium and the periosteum. **BL will accumulate and push the dura off the bone (this takes considerable amount of pressure).
3 main problematic herniation areas resulting from a Epidural Hematoma? damage resulting from each 1.Cingulate gyrus under falx cerebri:contusions will cause behavioral changes. 2.Thalamic shift under falx cerebri: MIDLINE SHIFT. 3.Uncal (medial aspect of parahippocampus) herniation around tentorium cerebelli: compression of brainstem (lethal) & CN 3
3 things to look for on a CT scan for a EPIdural Hematoma? 1.Lens-shaped hematoma. 2.Midline shift (asymmetrical ventricles). 3.Flattened GYRI on OPPOSITE side.
What does swirled lens-shaped hematoma on a CT scan indicate? Intermitten bleeding (not all of it is fresh, only the really white fluid is fresh BL).
Why does the hemorrhage remain confined to the the lens shaped region? Due to the dura's firm attachment to the inner table of calvarium at the frontal and occipital pole.
What type of herniation is occuring when the cingulate gyrus is pushed under the falx cerebri? what kind of cerebral changes will this bring about? Subfalcine herniation. Behavioral changes
Created by: WeeG