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Slice no. 7. T2-weighted transverse image (20/9.2/12) at the level of the vertex (31 weeks' gestation). 1, precentral sulcus; 2, central sulcus (almost abutting the hemispheric fissure); 3, postcentral sulcus.fig 9. Slice no. 8. T1-weighted transverse image (300/15/4) at the level of the third ventricle (29 weeks' gestation). The insula (star) is wide open
