Optokinetic-Graviceptive Interaction in Different Head Positions

Dichgans, J.; Diener, H. C.; Brandt, Th.

doi:10.3109/00016487409126371

Cited by 76 publications

(63 citation statements)

References 19 publications

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“…This result is in agreement with the intravisual "motion habituation" model proposed by Brandt, et al (1974) to account for similar alternations of self-motion occurring during circularvection about the vertical axis. Further, the results of Experiment 2 show that state differences in torsion appear to be the same in both the upright and supine viewing conditions, demonstrating an intravisual locus for visually induced torsion.…”

Section: Discussionsupporting

confidence: 81%

“…Since it has been assumed that tilt perception and ocular torsion result from the same vestibular processes (see Howard & Templeton, 1966), visually induced torsion is sometimes taken as the cause of visually induced tilt (e.g., Hughes, Brecher, & Fishkin, 1972). Merker and Held (Note 2) recently confirmed that the visually induced sensation of tilt is increased as a function of head tilt (see also Dichgans, Diener, & Brandt, 1974;Young, Oman, & Dichgans, 1975), allegedly because of the decrease in efficiency of the otoliths (Howard & Templeton, 1966;Young, 1974). However, Merker and Held also found that visually induced torsion is not increased as a result of head tilt, implying that this torsion is independent of the vestibular constraints on induced tilt perception.…”

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confidence: 81%

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State reversals of optically induced tilt and torsional eye movements

Finke

Held

1978

Perception & Psychophysics

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Alternations of the state of apparent self-motion during observation of a large visual display rotating about the line of sight are associated with alternations in the magnitude of induced tilt and torsional eye rotation. In one experiment, shifts in visually induced tilt during these state alternations are found to be in the opposite direction to corresponding shifts in induced ocular torsion. In a second experiment, the reversals of self-motion perception are shown to be an intravisual phenomenon, independent of competing inputs provided by the vestibular system. These results emphasize the importance of distinguishing between visual and vestibular processes in tilt perception and ocular rotation during human orientation to gravitational vertical.

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Section: Discussionsupporting

confidence: 81%

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confidence: 81%

State reversals of optically induced tilt and torsional eye movements

Finke

Held

1978

Perception & Psychophysics

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“…The strong asymmetry of the visually induced SV tilt dependent on whether or not steady head tilt and seen motion are in functionally corresponding (opposite) directions or not Dichgans, Diener, & Brandt, 1974) supports this assumption. Static head tilt, however, provides only steady state stimulation to the otolith, whereas actual head motion adds dynamic inputs from both the graviceptors and the semicircular canals.…”

Section: Frequency Characteristic Of Sv Tiltsupporting

confidence: 65%

The angle of visual roll motion determines displacement of subjective visual vertical

Dichgans

Hufschmidt

1977

Perception & Psychophysics

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The effect of full-field sinusoidal visual roll motion stimuli of various frequencies and peak velocities upon the orientation of subjective visual vertical (SV) was studied. The angle of the optokinetically induced displacement of SV was found to be a linear function of the logarithm of the stimulus oscillation angle. Interindividual slopes of this function varied between 2 and 9. The logarithmic function is independent of stimulus frequency within the range of .02 Hz to .5 Hz and of peak stimulus velocity from 7.5°/sec to 170 0/sec. It holds for oscillation angles up to 100°.140°. With larger rotational angles, saturation is reached. With small stimulus angles, a surprisingly high threshold (5°_8°) was observed in our experiments. This may reflect the unphysiological combination of visual roll stimuli without corroborating vestibular and proprioceptive inputs normally present when body sway produces visual stimulation. Under natural conditions, the visual feedback about spontaneous sway stabilizes body posture by integrating rotational velocity over stimulus duration which is equal to rotational angle.

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“…This asymmetry has been noted in measures of ocular counter-roll (OCR) in normals where there was a greater OCR with left than with right roll-tilt of the same amount (Kompanejetz 1928;Diamond et al 1979). Several studies have found a slight but significant counterclockwise deviation of the earth vertical when the head is in the upright position (Bauermeister 1964; Dichgans et al 1974;Guerrez et al 1998b). These findings and the fact that E-and A-effects in roll-tilt can be different from subject to subject have led to the suggestion of a ''directional preponderence'' in roll-tilt (Diamond et al 1979;Betts and Curthoys 1998).…”

Section: Discussionmentioning

confidence: 99%

Neck Muscle Vibration Alters Visually Perceived Roll in Normals

McKenna

Peng

Zee

2004

JARO - Journal of the Association for Research in Otolaryngolog

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The objective of this study was to determine whether vibration of dorsal neck muscles or of the mastoid bone or of both modified the perception of visual orientation in the head roll-tilt plane in normal subjects. Measurements of the subjective visual vertical (SVV) were obtained from 26 normal human subjects. Subjects reported the SVV in the upright and in the left and right 30°static head roll-tilt positions. Subjects then reported the SVV while vibration was applied to the left or right dorsal neck or left or right mastoid. Both head position and vibration independently modified settings of the SVV. In head-tilted positions, vibration of the upper dorsal neck muscles (on the side of the head opposite to the head tilt) caused a significantly greater shift of the SVV in the opposite direction of head roll-tilt compared to vibration of the lower dorsal neck muscles or of the mastoid. These results support a role for cervical somatosensory information in perception of visual orientation in the roll plane. Our findings may help explain the differences observed in visual orientation perception in normal subjects between head alone and whole-body roll-tilt. Finally, vibration of neck muscles in the head roll-tilted plane may be a useful method to test cervical somatosensory function possibly by increasing their response to external stimulation.

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Optokinetic-Graviceptive Interaction in Different Head Positions

Cited by 76 publications

References 19 publications

State reversals of optically induced tilt and torsional eye movements

State reversals of optically induced tilt and torsional eye movements

The angle of visual roll motion determines displacement of subjective visual vertical

Neck Muscle Vibration Alters Visually Perceived Roll in Normals

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