Fig 4. Correspondence of morphological features and electrophysiological correlates of the heterotopic aberrant bundles.

Upper row. Tractography of sigmoid bundles (in green and blue) showing structural asymmetry of thickness (A). Interhemispheric heterologous (crossed) coherent connections whose absolute (B) and relative (C) coefficients of coherence (see Fig 2) are significantly higher in 3 patients with partial callosal dysgenesis than in the control group, in 3 frequency bands. Notice the correspondence with morphology shown at left. Lower row. Tractography of Probst bundles (D, in purple). Intrahemispheric long-distance coherent connections whose absolute (E) and relative (F) coefficients of coherence are significantly higher in the group of five patients than in the control group, in 3 frequency bands. Left hemisphere is represented at left in all maps.