Human discrimination of translational accelerations

Naseri, Amir; Grant, Peter R.

doi:10.1007/s00221-012-3035-6

Cited by 36 publications

(46 citation statements)

References 19 publications

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“…First, the adaptive procedure relied on an online logarithmic fit of the psychometric function to select the most informative stimuli. Additionally, the concept of fitting in the logarithmic space is consistent with decreased sensitivity for increasing motion intensities reported here and elsewhere (Mallery et al 2010; Naseri and Grant 2012; Zaichik et al 1999). …”

Section: Resultssupporting

confidence: 88%

“…2) with amplitudes ranging from 0 to 3.3 m/s 2 . This allows for comparison with previous research (Benson et al 1986; MacNeilage et al 2010; Naseri and Grant 2012; Roditi and Crane 2012) and is within the frequency range of flight simulations. Pedestal and comparison stimulus order was randomized to avoid order effects and complications due to motion after-effect (i.e., the influence of a previous motion on the next motion, Crane 2012).…”

Section: Methodsmentioning

confidence: 67%

“…It has been shown that this can significantly improve the fit (Wichmann and Hill 2001). The fitting was performed in logarithmic stimulus space, a choice motivated by the proportional decrease in self-motion sensitivity with increasing stimulus intensity (Mallery et al 2010; Naseri and Grant 2012; Zaichik et al 1999) and because it has already been adopted in previous studies (Soyka et al 2011, 2012).

Fig.…”

Section: Methodsmentioning

confidence: 99%

“…This parameter is an indicator of the participant’s sensitivity to relative change in motion and is therefore arbitrarily taken as the differential threshold. Normally, the probability of correct discrimination corresponding to a stimulus change of one differential threshold is arbitrarily chosen by the experimenter between 70 and 85 % (MacNeilage et al 2010; Mallery et al 2010; Naseri and Grant 2012). …”

Section: Methodsmentioning

confidence: 99%

“…Human differential thresholds to linear self-motion have been investigated by Naseri and Grant (2012) over a range of 0.5–2 m/s 2 for surge motion and by Zaichik et al (1999) over a range of 0–0.6 m/s 2 for surge, sway, and heave motion. Their works show that differential thresholds increase with stimulus intensity following Weber’s perceptual law (Fechner 1860).…”

Section: Introductionmentioning

confidence: 99%

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Human sensitivity to vertical self-motion

Nesti

Barnett‐Cowan

MacNeilage³

et al. 2013

Exp Brain Res

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Perceiving vertical self-motion is crucial for maintaining balance as well as for controlling an aircraft. Whereas heave absolute thresholds have been exhaustively studied, little work has been done in investigating how vertical sensitivity depends on motion intensity (i.e., differential thresholds). Here we measure human sensitivity for 1-Hz sinusoidal accelerations for 10 participants in darkness. Absolute and differential thresholds are measured for upward and downward translations independently at 5 different peak amplitudes ranging from 0 to 2 m/s2. Overall vertical differential thresholds are higher than horizontal differential thresholds found in the literature. Psychometric functions are fit in linear and logarithmic space, with goodness of fit being similar in both cases. Differential thresholds are higher for upward as compared to downward motion and increase with stimulus intensity following a trend best described by two power laws. The power laws’ exponents of 0.60 and 0.42 for upward and downward motion, respectively, deviate from Weber’s Law in that thresholds increase less than expected at high stimulus intensity. We speculate that increased sensitivity at high accelerations and greater sensitivity to downward than upward self-motion may reflect adaptations to avoid falling.

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Section: Resultssupporting

confidence: 88%

Section: Methodsmentioning

confidence: 67%

Fig.…”

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Human sensitivity to vertical self-motion

Nesti

Barnett‐Cowan

MacNeilage³

et al. 2013

Exp Brain Res

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Perception-Based Motion Cueing: A Cybernetics Approach to Motion Simulation

Pretto

Venrooij

Nesti

et al. 2015

Trends in Augmentation of Human Performance

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The goal of vehicle motion simulation is the realistic reproduction of the perception a human observer would have inside the moving vehicle by providing realistic motion cues inside a motion simulator. Motion cueing algorithms play a central role in this process by converting the desired vehicle motion into simulator input commands with maximal perceptual fidelity, while remaining within the limited workspace of the motion simulator. By understanding how the one’s own body motion through the environment is transduced into neural information by the visual, vestibular and somatosensory systems and how this information is processed in order to create a whole percept of self-motion we can qualify the perceptual fidelity of the simulation. In this chapter, we address how a deep understanding of the functional principles underlying self-motion perception can be exploited to develop new motion cueing algorithms and, in turn, how motion simulation can increase our understanding of the brain’s perceptual processes. We propose a perception-based motion cueing algorithm that relies on knowledge about human self-motion perception and uses it to calculate the vehicle motion percept, i.e. how the motion of a vehicle is perceived by a human observer. The calculation is possible through the use of a self-motion perception model, which simulate the brain’s motion perception processes. The goal of the perception-based algorithm is then to reproduce the simulator motion that minimizes the difference between the vehicle’s desired percept and the actual simulator percept, i.e. the “perceptual error”. Finally, we describe the first experimental validation of the new motion cueing algorithm and shown that an improvement in the current standards of motion cueing is possible

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Vestibular modulation of muscle sympathetic nerve activity by the utricle during sub-perceptual sinusoidal linear acceleration in humans

et al. 2014

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We assessed the capacity for the vestibular utricle to modulate muscle sympathetic nerve activity (MSNA) during sinusoidal linear acceleration at amplitudes extending from imperceptible to clearly perceptible. Subjects (n = 16) were seated in a sealed room, eliminating visual cues, mounted on a linear motor that could deliver peak sinusoidal accelerations of 30 mG in the antero-posterior direction. Subjects sat on a padded chair with their neck and head supported vertically, thereby minimizing somatosensory cues, facing the direction of motion in the anterior direction. Each block of sinusoidal motion was applied at a time unknown to subjects and in a random order of amplitudes (1.25, 2.5, 5, 10, 20 and 30 mG), at a constant frequency of 0.2 Hz. MSNA was recorded via tungsten microelectrodes inserted into muscle fascicles of the common peroneal nerve. Subjects used a linear potentiometer aligned to the axis of motion to indicate any perceived movement, which was compared with the accelerometer signal of actual room movement. On average, 67% correct detection of movement did not occur until 6.5 mG, with correct knowledge of the direction of movement at ~10 mG. Cross-correlation analysis revealed potent sinusoidal modulation of MSNA even at accelerations subjects could not perceive (1.25-5 mG). The modulation index showed a positive linear increase with acceleration amplitude, such that the modulation was significantly higher (25.3 ± 3.7%) at 30 mG than at 1.25 mG (15.5 ± 1.2%). We conclude that selective activation of the vestibular utricle causes a pronounced modulation of MSNA, even at levels well below perceptual threshold, and provides further evidence in support of the importance of vestibulosympathetic reflexes in human cardiovascular control.

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Human discrimination of translational accelerations

Cited by 36 publications

References 19 publications

Human sensitivity to vertical self-motion

Human sensitivity to vertical self-motion

Perception-Based Motion Cueing: A Cybernetics Approach to Motion Simulation

Vestibular modulation of muscle sympathetic nerve activity by the utricle during sub-perceptual sinusoidal linear acceleration in humans

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