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Figures
- fig 1.
Distribution of fetuses by gestational age (GA)
- fig 2.
Slice no. 1. T2-weighted midline sagittal image (20/9.2/12) (31 weeks' gestation). 1, parietooccipital fissure; 2, calcarine fissure; small arrow, marginal sulcus; large arrow, cingular sulcus.fig 3. Slice no. 2. T2-weighted parasagittal image (20/9.2/12) at the level of the sylvian fissure (28 weeks' gestation). Opercularization of the insula is completed posteriorly (arrow). Anteriorly, the insula (star) is wide open
- fig 4.
Slice no. 3. T2-weighted anterior coronal image (20/9.2/12) at the anterior part of the frontal lobes (35 weeks' gestation). 1, superior frontal sulcus; 2, inferior frontal sulcus.fig 5. Slice no. 4. T2-weighted coronal image (20/9.2/12) at the level of the third ventricle (35 weeks' gestation). Large arrow, cingulate sulcus; small arrow, callosal sulcus (barely visible); 1, superior temporal sulcus (anterior part); 2, inferior temporal sulcus; 3, external occipital temporal sulcus; 4, collateral sulcus.
- fig 6.
Slice no. 5. T2-weighted coronal image (20/9.2/12) at the level of the temporal horns (33 weeks' gestation). Large arrow, cingulate sulcus; small arrow, callosal sulcus (barely visible); 1, superior temporal sulcus (posterior part); 2, collateral sulcus; 3, hippocampal fissure.fig 7. Slice no. 6. T2-weighted coronal image (20/9.2/12) at the level of the ventricular atria (33 weeks' gestation). 1, collateral sulcus; 2, intraparietal sulcus
- fig 8.
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
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Chronology of sulcation in our MR imaging series and in neuropathologic studies
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