Frequency of all landmarks
| All Hemispheres (n = 178) | Right (n = 88) | Left (n = 90) | |
|---|---|---|---|
| Upper T sign | 109 (61.2%) | 51 (58%) | 58 (64.4%) |
| L sign | 107 (60.1%) | 55 (62.5%) | 52 (57.8%) |
| Lower T sign | 138 (77.5%) | 69 (78.4%) | 69 (76.7%) |
| M sign | 157 (88.2%) | 77 (87.5%) | 80 (88.9%) |
| Bifid pc sign | 157 (88.2%) | 76 (86.4%) | 81 (90%) |
| Midline sulcus sign | 159 (87.5%) | 77 (87.5%) | 82 (91.1%) |
| Bracket sign | 82% (of 78 patients) | ||
| Thin post cg sign | 170 (95.5%) | 85 (96.6%) | 85 (94.4%) |
| Handknob sign | 97 (54.5%) | 49 (55.7%) | 48 (53.3%) |
| Subcentral gyrus sign | 176 (98.9%) | 84 (95.5%) | 88 (97.8%) |
Note:—Bifid pc sign indicates the bifid post cg sign.