[TA] a horizontal sulcus extending back from the postcentral sulcus over some distance, then dividing perpendicularly into two branches so as to form, with the postcentral sulcus, a figure H. It divides the parietal lobe into superior and inferior parietal lobules. SYN: sulcus intraparietalis [TA], interparietal sulcus, intraparietal sulcus of Turner, Turner sulcus.
