The groove for transverse sinus is a groove which runs along the internal surface of the occipital bone, running laterally between the superior and inferior fossae of the cruciform eminence. The transverse sinuses travel along this groove.
A small or absent bony groove in the occiput in conjunction with the compressible nature of the transverse sinus makes this structure vulnerable to tapering with increased ICP. [1]
Additional images
Base of the skull. Upper surface. Groove for transverse sinus labelled at bottom.
Base of the skull. Upper surface. Transverse sinuses are drawn at bottom.