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Abstract
Objective – To examine the potentials evoked by rotatory stimulation, which we consider the optimal means of invoking angular acceleration and which may lead to clinical applications in patients with vertigo. Material and Methods – Horizontal rotatory stimulation using a trapezoidal waveform was performed with 3 different angular accelerations (20, 15 and 10°/s2) used sequentially, with alternating clockwise and counterclockwise stimulation, to normal subjects and a patient with bilateral loss of vestibular function. Results – It is likely that angular accelerations of <20°/s2 produce minor somatosensory effects. Clear potentials were evoked in 13/18 ears (72%) of the normal subjects with stimulation at an angular acceleration of 15°/s2. No response was recorded in the patient with stimulation at 15°/s2. Conclusion – We suggest that an angular acceleration of 15°/s2 is optimal for clinical examinations.
Kenmochi M, Ohashi T, Nishino H, Sato S. Cortical potentials evoked by horizontal rotatory stimulation: the effects of angular acceleration. Acta Otolaryngol 2003; 123: 923–927.
Kenmochi M, Ohashi T, Nishino H, Sato S. Cortical potentials evoked by horizontal rotatory stimulation: the effects of angular acceleration. Acta Otolaryngol 2003; 123: 923–927.