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Cover illustration. Left: line drawing depicting the location of five different corticofugal tracts originating from five different arm representations of the motor cortices. The illustration represents mid-levels of the internal capsule in the horizontal plane. The corticofugal projection from the arm representation of the rostral cingulate motor cortex (blue outline) occupied the anterior limb and genu of the internal capsule. The supplementary motor cortex (red outline) occupied the genu and posterior limb. The corticofugal projection from the arm area of the dorsal lateral premotor cortex (green outline), caudal cingulate motor cortex (yellow outline) and primary motor cortex (dark blue outline) occupied anterior to posterior regions, respectively, of the posterior limb. Top right: low power photomicrograph of a horizontal section through inferior levels of the posterior limb of the internal capsule showing the corticofugal tract (blue fibre bundle) from the arm area of the dorsal lateral premotor cortex. The inset is a high power image of the labelled fibre field. Bottom right: a low power photomicrograph of a coronal section illustrating labelled fibres in the corona radiata arching inferiorly from the arm representation of the supplementary motor cortex en route to the internal capsule. From `Localization of arm representation in the corona radiata and internal capsule in the non-human primate' by R. J. Morecraft et al., pp. 176 -198.
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