Cognitive Suppression of Tilt Sensations during Linear Horizontal Self-Motion in the Dark

Wertheim, Alexander H.; Mesland, Barbara S; Bles, W.

doi:10.1068/p3092

Cited by 56 publications

(47 citation statements)

References 16 publications

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“…Therefore, it is clear that the pattern of multisensory stimulation does not always have to be consistent to induce compelling vection and generate substantial vection improvements. However, it should also be noted that, in addition to the contribution of retinal and extra-retinal information, higher-level cognitive (see Palmisano and Chan 2004;Wertheim et al 2001) and contextual factors (see Wright et al 2006) have also been suggested to play a role in the suppression and/or enhancement of illusory self-motion. Therefore, future research should further examine the contribution of the different sensory systems as well as the relative importance of cognitive and contextual information to the perception of selfmotion and vection.…”

Section: Discussionmentioning

confidence: 99%

Vection in Depth during Consistent and Inconsistent Multisensory Stimulation

2011

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We examined vection induced during physical or simulated head oscillation along either the horizontal or depth axis. In the first two experiments, during active conditions, subjects viewed radial-flow displays which simulated viewpoint oscillation that was either in-phase or out-of-phase with their own tracked head movements. In passive conditions, stationary subjects viewed playbacks of displays generated in earlier active conditions. A third control, experiment was also conducted where physical and simulated fore ^ aft oscillation was added to a lamellar flow display. Consistent with ecology, when active in-phase horizontal oscillation was added to a radial-flow display it modestly improved vection compared to active out-of-phase and passive conditions. However, when active fore ^ aft head movements were added to either a radial-flow or a lamellarflow display, both in-phase and out-of-phase conditions produced very similar vection. Our research shows that consistent multisensory input can enhance the visual perception of self-motion in some situations. However, it is clear that multisensory stimulation does not have to be consistent (ie ecological) to generate compelling vection in depth. Disciplines

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Section: Discussionmentioning

confidence: 99%

Vection in Depth during Consistent and Inconsistent Multisensory Stimulation

2011

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“…This is important, since in the absence of vision, perception of vertical is altered by the changing gravito-inertial vector that results from any acceleration not aligned with the constant gravitational background force (i.e., the hilltop illusion) [14], [18], [19], [47]. In this study, no visual tilt is present in the visual input other than the visual tilt directly resulting from self-generated head tilts.…”

Section: Discussionmentioning

confidence: 93%

Head Stabilization Shows Visual and Inertial Dependence During Passive Stimulation: Implications for Virtual Rehabilitation

Wright

Agah

Darvish

et al. 2013

IEEE Trans. Neural Syst. Rehabil. Eng.

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Sensorimotor coordination relies on the fine calibration and integration of visual, vestibular, and somatosensory input. Using virtual environments (VE) allows for the dissociation of visual and inertial inputs to manipulate human behavioral outputs. Our goal was to employ VE technology in a novel manner to investigate how head stabilization is affected by spatiotemporal properties of dynamic visual input when combined with passive motion on a linear sled. Healthy adults (n = 12) wore a head-mounted display during naso-occipital sinusoidal horizontal whole body translations while seated. Subjects were secured in a seat with a five-point harness, with the head free to move. Frequency and amplitude of sinusoidal input (i.e., inertial conditions) were set to create overlapping conditions of maximum acceleration (amax) or velocity (vmax). Four inertial conditions were combined with four visual conditions (VIS). VIS were created so that direction of optic flow either matched direction of passive motion or did not. The effect of near and far fixation distance within the VE was also tested. Head kinematics were collected with a three-axis gyro. Head stability showed a complex interaction dependent on changes in weighting of visual and inertial inputs that changed with the sled driving frequency. Inertial condition affected amplitude (p < 0.0000) and phase (p < 0.0000) of head pitch angular velocity. In the absence of visual input, head pitch velocity amplitude increased (p < 0.01). An interaction effect between inertial and VIS conditions on head yaw occurred in SW (p < 0.05). There was also a significant interaction of depth of field and inertial condition on amplitude (p < 0.001) and phase (p < 0.05) of head yaw velocity in SW, especially during high vmax conditions. We conclude visual flow can organize lateral cervical responses despite being discordant with inertial input. When using VE for rehabilitation, possible unintended, involuntary or reflexive motor responses that may not be present in traditional training environments should be taken into consideration.

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“…This may be attributed to the assumption that not only idiothetic information is taken into account by the CNS, i.e., information gained by inertial sensors or information such as efference copies, but also certain pre-existing knowledge or cognitive information [22,23,25]. Especially these latter cues are likely to vary between subjects, and become more important the less idiothetic information is available.…”

Section: Discussionmentioning

confidence: 99%

Perceived radial translation during centrifugation

Bos

Grácio²

2015

VES

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Abstract. BACKGROUND: Linear acceleration generally gives rise to translation perception. Centripetal acceleration during centrifugation, however, has never been reported giving rise to a radial, inward translation perception. OBJECTIVE: To study whether centrifugation can induce a radial translation perception in the absence of visual cues. METHODS: To that end, we exposed 12 subjects to a centripetal acceleration with eyes closed. To avoid confounding with angular motion perception, subjects were fist rotated on-axis, and were shifted out fast and slow only after rotation sensation had vanished. They were asked for translation direction and velocity right after the shift-out, as well as after about 60 seconds of constant centrifugation. RESULTS: Independent of fast or slow shift-out, the vast statistically significant majority of trials yielded an inward radial translation perception, which velocity was constant after 60 seconds of constant centrifugation. CONCLUSIONS: We therefore conclude that during centrifugation, an inward radial translation perception does exist in humans, which perception reaches a constant, non-zero value during constant rotation, lasting for at least one minute. These results can be understood by high-pass filtering of otolith afferents to make a distinction between inertial and gravitational acceleration, followed by a mere integration over time to reach a constant velocity perception.

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Cognitive Suppression of Tilt Sensations during Linear Horizontal Self-Motion in the Dark

Cited by 56 publications

References 16 publications

Vection in Depth during Consistent and Inconsistent Multisensory Stimulation

Vection in Depth during Consistent and Inconsistent Multisensory Stimulation

Head Stabilization Shows Visual and Inertial Dependence During Passive Stimulation: Implications for Virtual Rehabilitation

Perceived radial translation during centrifugation

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