The falx cerebri is a double-fold of dura mater that descends through the interhemispheric fissure in the midline of the brain to separate the two cerebral hemispheres. The falx cerebri is relatively thin anteriorly where it attaches to the crista galli of the ethmoid bone , but is broader posteriorly where it attaches to the superior surface of the tentorium cerebelli inferiorly 1,2. It attaches superiorly to the midline of the cranium and extends posteriorly to attach to the internal occipital protuberance 3.
For blood supply and innervation, see dura. The falx is rarely abnormal as an isolated variant; rather it is usually deficient as part of a broader congenital abnormality such as holoprosencephaly 6. The most common variants are seen anteriorly where the falx may be deficient or fenestrated 6. Abnormalities of the falx are frequently associated with abnormalities of the superior sagittal sinus 6.
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Maingard, J. Falx cerebri. Reference article, Radiopaedia. Central Nervous System. Its lower margin is free and concave, and contains the inferior sagittal sinus. IMAIOS and selected third parties, use cookies or similar technologies, in particular for audience measurement.
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