FIGURE 2.

Redundancy circuits of the commissural pathways identified in the human brain. (a) The tractogram shows the fiber tract composition of the orbitofrontal (red), temporal (green), and occipital (blue) redundancy circuits. Each of them connects two cortical regions with two distinctly different connection routes through the anterior commissure and the corpus callosum. (b) The two tractograms show the anterior commissure components of the three redundancy circuits in axial and sagittal views. The orbitofrontal component (red) connects between left‐right 10 pp and 10v. The temporal (green) component connects primarily to the left and right TGd and TGv region. The occipital (blue) component connects V1 primarily, and partly to V2, V3, and V4. (c) The two tractograms show the corpus callosum components of the three redundancy circuits in axial and sagittal views. The three components (red, green, and blue) also connect to the same cortical regions of their anterior commissure counterpart but through a completely different route in the midsagittal plane. (d) Connectograms represents bilateral connectivity patterns of the average human anterior commissure and corpus callosum, confirming that these two commissure pathways connect to common parcellated region pairs. (e) The white matter map of the anterior commissure and corpus callosum forming the redundancy circuits confirms that their connections travel through entirely different routes. AC, anterior commissure, CC, corpus callosum