Figure 9.

Schematic and coloured correlation between the lateral cortical surface and the subcortical organisation of the TPO region in a dissected left hemisphere. (A) We divided the cortices of the TPO junction into two trapezoidal areas: a, the SMG, posterior part of the STG; b, junction between the posterior MTG and ITG and AG and MOG, IOG. (B) We exposed the subcortical pathways underneath the same two trapezoidal areas we selected on the cortical surface. In particular, the dissection was focused on two main tracts: the SLF (green, orange tags), which connects the frontal, parietal and temporal regions along a vertical, C-shaped course around the posterior insular profile; the IFOF fibres (blue), which have a horizontal orientation running anterior-to-posterior, cross the SLF on a more medial layer (red circle). Loco-regional ‘U’ intergyral fibres were also revealed (red). (C) Fibre tracking of the IFOF (pink fibres) and the SLF (green, yellow: indirect component; red fibres: direct portion). AG, angular gyrus; MTG, middle temporal gyrus; TPO, temporo-parieto-occipital; IOG, inferior occipital gyrus; ITG, inferior temporal gyrus.