| corticonuclear fibre | <physiology> Descriptive term connotating fibres from a cortical structure (cerebral or cerebellar) passing to subcortical cell groups; fibres comprising the tractus corticobulbaris; cerebellar corticonuclear fibres (Purkinje cell axons to the cerebellar nuclei). Synonym: fibrae corticonucleares. (05 Mar 2000) |
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| corticonuclear t. |
the nerve fiber tract formed by fibers (corticonuclear fibers) of the pyramidal tract that arise in the cerebral cortex, descend in the internal capsule, and synapse in the various motor nuclei of the mesencephalon, pons, and medulla oblongata. Called also corticobulbar t.
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