oculomotor nucleus


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oculomotor nucleus

[¦äk·yə·lō′mōd·ər ′nü·klē·əs]
(neuroscience)
A nucleus in the floor of the midbrain that gives rise to motor fibers of the oculomotor nerve.
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Its pathway involves the following primary structures: retinal cones, optic nerve, lateral geniculate nucleus, occipital lobe, posterior parietal cortex, frontal eye field (FEF), and the FEF sending projections via the internal capsule to the main oculomotor nucleus, as well as the parasympathetic accessory oculomotor nucleus (i.