Torsional nystagmus and otolith dumping effects investigated by head circumduction.

ABSTRACT: This study introduces a novel paradigm to induce the torsional vestibulo-ocular reflex (VOR) using head circumduction-a circular motion of the head combining extension, lateral rotation, and flexion of the neck. The aims were to 1) evaluate the reliability of this maneuver in generating torsional nystagmus and 2) explore the impact of postrotational head tilt on induced VOR responses. Fourteen healthy participants (age = 27.3 ± 5.3 yr) were tested using a three-dimensional (3-D) eye-tracker to record eye movements induced by head circumduction, performed at a frequency of 0.75 Hz. Participants were recorded on stopping in either a head-up or head-down condition. All participants showed robust postrotational torsional nystagmus. However, this was significantly shorter during h

SUBMITTER: Corrado M 

PROVIDER: S-EPMC7617948 | biostudies-literature | 2025 Apr

REPOSITORIES: biostudies-literature