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Abstract #0441

Relative contribution of motor and association fibres to the white matter underlying motor cortex in human and macaque.

Rilling J, Gross C, Robson M, Kastner S, Richter W, Richter M, Pinsk M, Woolrich M, Behrens T, Johansen-Berg H
Emory University

By explicit modelling of local complexity in the diffusion signal, we are able to make quantitative estimates of the relative contributions of different fibre populations. In the well known region of fibre complexity under motor cortex, we find a notable evolution from macaque to human. In the macaque brain, motor pathways dominate this region; in the human brain language fibres dominate.