Scene: Superior longitudinal fasciculus 1 (SLF 1); maps 30, 31 (Somatomotor, Cingulo-Opercular networks)

study:
IamBrain HCP Anatomy & Tractography Tutorial

SCENE FILE:
IamBrain_HCP_Tracts_Anatomy_Appendix_1April22

SCENE:
Superior longitudinal fasciculus 1 (SLF 1); maps 30, 31 (Somatomotor, Cingulo-Opercular networks)

DESCRIPTION:
Tractography protocol definition: a coronal plane in the region of the central sulcus within the frontal/parietal cortex is used as a seed along with two target masks. Frontally, target masks for the first, second, and third branches of the SLF were coronal sections through the superior, middle, and inferior frontal gyri, respectively, placed at the level of the posterior end of the genu of the corpus callosum. Posteriorly, a large coronal target mask in the superior parietal lobule, immediately posterior to the margin of the cingulate gyrus is used for SLFl. For SLF2 and SLF3, the second target masks are placed in the angular gyrus and supramarginal gyrus (SMG)respectively. In each case, seed placement reflects the placement of the second target whilst being moved anteriorly into the region of the central sulcus. For each protocol, an axial exclusion mask was placed underneath the parietal cortex and one blocking subcortical areas prevented leaking into ventrally oriented fibres. A final coronal exclusion mask through subcortical areas posterior to the caudal end of the genu of the corpus callosum prevented leaking into ventral longitudinal tracts. (Warrington et al., NeuroImage, 2020)

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