Postvibration changes in the spike activity of neurons in the medial vestibular nucleus.

Changes in the baseline spike activity in the medial vestibular nucleus were studied after exposure to vibration for 5, 10, and 15 days. Studies addressed the distributions of neurons within this structure in terms of the regularity of their spike activity, the dynamics of neural flows, and the modalities of interspike histogram modalities. Mean values were calculated for the major statistical measures of baseline spike activity. Statistically significant changes in the major characteristics of neuron activity were seen in the medial vestibular nucleus at different periods of vibration exposure. Vibration was found to induce complex dynamic rearrangements in the baseline activity of neurons in this structure. The characteristics and functional significance of the results are discussed.