Effects of Five-Day “Dry” Immersion on the Strength of the Ponzo and the Müller-Lyer Illusions

Sosnina, I. S.; Lyakhovetskii, Vsevolod; Zelenskiy, K. A.; Karpinskaya, V. Yu.; Tomilovskaya, Elena

doi:10.1007/s11055-019-00811-2

Cited by 8 publications

(3 citation statements)

References 23 publications

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“…At the same time, recent studies indicate a high interconnection of sensory systems with each other under conditions of support withdrawal, as well as the presence of changes in this interconnection in CNS. These studies, in particular, revealed a correlation between indicators of vestibular function and visual tracking ( Glukhikh et al, 2020 ), an increase in the contrast sensitivity of the visual system in the low spatial frequency range with a specific sensitivity of the magnocellular pathway to these frequencies ( Sosnina et al, 2019 ; 2021 ; Shoshina et al, 2020 ). The results of Pasekova et al (2020) revealed a significant decrease in transient-evoked otoacoustic emissions for the stimulation frequency of 1 kHz when the subjects were in an immersion bath ( Pasekova et al, 2020 ).…”

Section: Dry Immersionmentioning

confidence: 99%

Impact of different ground-based microgravity models on human sensorimotor system

et al. 2023

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This review includes current and updated information about various ground-based microgravity models and their impact on the human sensorimotor system. All known models of microgravity are imperfect in a simulation of the physiological effects of microgravity but have their advantages and disadvantages. This review points out that understanding the role of gravity in motion control requires consideration of data from different environments and in various contexts. The compiled information can be helpful to researchers to effectively plan experiments using ground-based models of the effects of space flight, depending on the problem posed.

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Section: Dry Immersionmentioning

confidence: 99%

Impact of different ground-based microgravity models on human sensorimotor system

et al. 2023

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“…Stimulus configuration may affect the motor responses even with visual feedback though such influence is lower compared to when the visual feedback is absent. The arrows of Muller-Lyer illusion affect the movement amplitude even when the stimulus is clearly visible ( Gentilucci et al, 1996 ); the circles of Ebbinghaus illusion influence the movement time ( van Donkelaar, 1999 ); the Ponzo and Muller-Lyer illusions also modulate the motor responses during the course of 5-day DI ( Sosnina et al, 2019 ). In our case, the effects observed in the memorization phase are mainly similar to those received in the reproduction phase but they have lower magnitude.…”

Section: Discussionmentioning

confidence: 99%

Perception of length and orientation in dry immersion

Lyakhovetskii

Chetverikov

Zelenskaya

et al. 2023

Front. Neural Circuits

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IntroductionHow does gravity (or lack thereof) affect sensory-motor processing? We analyze sensorimotor estimation dynamics for line segments with varying direction (orientation) in a 7-day dry immersion (DI), a ground-based model of gravitational unloading.MethodsThe measurements were carried out before the start of the DI, on the first, third, fifth and seventh days of the DI, and after its completion. At the memorization stage, the volunteers led the leading hand along the visible segment on a touchscreen display, and at the reproduction stage they repeated this movement on an empty screen. A control group followed the same procedure without DI.ResultsBoth in the DI and control groups, when memorizing, the overall error in estimating the lengths and directions of the segments was small and did not have pronounced dynamics; when reproducing, an oblique effect (higher variability of responses to oblique orientations compared to cardinal ones) was obtained. We then separated biases (systematic error) and uncertainty (random error) in subjects’ responses. At the same time, two opposite trends were more pronounced in the DI group during the DI. On the one hand the cardinal bias (a repulsion of orientation estimates away from cardinal axes) and, to a small extent, the variability of direction estimates decreased. On the other hand, the overestimation bias in length estimates increased.DiscussionSuch error pattern strongly supports the hypotheses of the vector encoding, in which the direction and length of the planned movement are encoded independently of each other when the DI disrupts primarily the movement length encoding.

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“…A dissociation between the verbal and motor estimations of the Ponzo and Muller-Lyer illusions was tested in dry immersion conditions, and both were found to be sensitive to the absence of support afference (Sosnina et al, 2019 ; Sosnina I. et al, 2021 ; Sosnina I. S. et al, 2021 ). In the proposed paradigm, participants are presented with the illusions or a neutral pair of lines of the same length on a touch screen; they are asked either to give a verbal estimation of which line section is longer and by what percentage, or to provide a motor estimation by sliding their finger over each line (Karpinskaia et al, 2016 ; Lyakhovetskii and Karpinskaia, 2017 ).…”

Section: Discussionmentioning

confidence: 99%