The lateral wall of the cavernous sinus

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Abstract
In a study of the cavernous sinus in 70 [human] specimens, the lateral wall of the sinus was formed by 2 layers: a superficial, dural layer and a deep layer. The latter was formed by the sheaths of nerves III, IV and V1,2 plus a reticular membrane extending between the sheaths. This membrane was often incomplete, particularly between the sheaths of nerves III and IV above, and V1 below. These findings do not conform with the descriptions of a single dural layer of the lateral wall, with nerves III, IV and V1,2 embedded in it, nor to other descriptions showing the cavity of the sinus divided into 2 compartments by a septum close to the lateral wall, with nerves III, IV and V1 located within the septum. The superficial and the deep layers of the lateral wall were loosely attached to each other and easy to separate. In no case was a superficial compartment of the sinus present between the 2 layers, and the nerves were never running embedded in the superficial layer.

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