Influence of the extraocular muscle proprioceptors on the orientation of the vestibulo-ocular reflex.
In the intact brain lamb, unilateral electrolytic lesion of the medial dorso-lateral portion of the semilunar ganglion containing the first order neurons of the eye muscle proprioception induced modifications of the horizontal and vertical vestibulo-ocular reflex (HVOR and VVOR) which consisted in marked alterations of the trajectories of the quick phases, while the slow phases were scarcely affected. Similar results were observed after section of the branches described by Winckler in the retrobulbar region along the extraocular muscle proprioceptive information travels. These findings extend those of previous investigations carried out in decorticate animals.
Pettorossi
V E
VE
Institute of Human Physiology, University of Perugia, Italy.
Errico
P
P
Ferraresi
A
A
Manni
E
E
D000818:Animals; D009801:Oculomotor Muscles / Q000502:physiology*; D011434:Proprioception / Q000502:physiology*; D012027:Reflex, Vestibulo-Ocular / Q000502:physiology*; D012756:Sheep; D012668:Trigeminal Ganglion / Q000502:physiology