Saccular activations in the brainstem and the cerebellum (fMRI)

The saccular projections in the brainstem and the cerebellum to the uvula and the nodulus have recently been demonstrated in the macaque. The aim of this fMRI study was to determine whether vestibular evoked myogenic potentials (VEMP) which are a routine diagnostic instrument for sacculus function for the past years can activate areas other than the vestibular nuclei in the brainstem and the cerebellum in humans. If so could one also demonstrate a dominant saccular input from either ear in right-handers? Therefore, the differential effects of unilateral VEMP stimulation (500Hz tone burst signal in the right ear…