Saccular impact on ocular torsion
article
When someone is tilted laterally the sheer force on the maculae of the utriculus and the sacculus is described by the sine and the cosine of the angle of tilt, respectively. So both the sacculus and the utriculus are stimulated, but in the litera-ture ocular torsion is normally attributed to utricular function alone (and thus seen as a response to y-axis linear acceleration).
However, on the base of a series of experiments on a tilt chair, a linear track, human centrifuges, and during parabolic flights, we conclude that the sacculus contribu-tes to ocular torsion as well (there is a response to z-axis linear acceleration).
The data suggest that the ratio of the utricular and saccular impact on ocular torsion is 3:1. The utriculus generates conjugate and the sacculus disjunctive torsional eye movements.
However, on the base of a series of experiments on a tilt chair, a linear track, human centrifuges, and during parabolic flights, we conclude that the sacculus contribu-tes to ocular torsion as well (there is a response to z-axis linear acceleration).
The data suggest that the ratio of the utricular and saccular impact on ocular torsion is 3:1. The utriculus generates conjugate and the sacculus disjunctive torsional eye movements.
Topics
TNO Identifier
8607
Source
Brain Research Bulletin, 40(5-6), pp. 321-326.
Pages
321-326
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