Saccadic Hypermetria From a Selective Lesion of the Fastigial Oculomotor Region

The main cerebellar structures involved in ocular motor control comprise the flocculus and paraflocculus, nodulus and uvula, as well as the oculomotor vermis (OMV) and the fastigial oculomotor region (FOR).1 Although the flocculus and paraflocculus are critical for smooth pursuit and for gaze holding,2 the so-called “vestibulocerebellar” centers, the OMV and the FOR are exclusively involved in the control of smooth pursuit and saccades.

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