Abstract
As we have mentioned earlier, in Chap. II, the superior and middle temporal sulci (ts and tm) run parallel to the superficial sylvian sulcus [sy (p)] along the temporal lobe. The former is generally continuous while the latter is often broken up by plis de passage. Behind the sylvian fissure, they both curve upward at the level of the lower parietal lobule, which they score quite deeply, approaching the intraparietal sulcus. These ascending portions [ts (asc) and tm (asc)] are roughly parallel to the posterior ascending branch of the sylvian fissure [sy (p asc)], but with a slight backward divergence, especially in the case of tm(asc) which, already on the edge of the occipital lobe, slants obliquely posteriorly towards the occipital pole. Near the lateral edge of the hemisphere, an occipital sulcus may continue the direction of the inferior temporal sulcus (ti), located on the inferior aspect of the brain.
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