parietal f

A f. of varying size, and not always constant, near the posterior superior angle of the parietal bone, which contains an emi ary vein of the superior longitudinal sinus, posterior condylar foramina. Foramina behind the condyles of the occipital bones, giving pa age to veins, and opening externally into the occipital fo a, posterior ethmoidal f. See posterior ethmoidal canal, under canal, posterior palatine foramina. The external apertures of the pal a to maxillary and pterygopalatine canals, posterior sacral foramina. Four openings on each side of the posterior surface of the sacrum, which transmit the posterior branches of the sacral nerves.