Spontaneous eye motility following a unilateral vestibular lesion.
The strong imbalance of the output of vestibular nuclei, resulting from a hemilabyrinthectomy, causes among other postural and ocular symptoms, a failure to hold a steady ocular position in the dark. In this study the time course of the spontaneous eye motility following a right hemilabyrinthectomy was analyzed. In all animals, at the first recordings, drifts of 0.8-1.0 degrees/s were present. These drifts were directed to the lesion side, then they shifted their trajectory more than once. At the final recordings, most animals exhibited very slow drifts (0.05-0.1 degrees/s) directed to the intact side suggesting an overcompensation of the initial extreme rightward deviation.
Petrosini
L
L
Institute of Human Physiology, Catholic University, Rome, Italy.
Gremoli
T
T
D000818:Animals; D007758:Ear, Inner / Q000502:physiology* / Q000601:surgery; D005133:Eye Movements; D006168:Guinea Pigs; D009473:Neuronal Plasticity; D014726:Vestibular Nuclei / Q000502:physiology*