Perception of length and orientation in dry immersion
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| Title: | Perception of length and orientation in dry immersion |
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| Authors: | Vsevolod Lyakhovetskii, Andrey Chetverikov, Inna Zelenskaya, Elena Tomilovskaya, Valeriia Karpinskaia |
| Source: | Front Neural Circuits Frontiers in Neural Circuits, Vol 17 (2023) Frontiers in Neural Circuits, 17 |
| Publisher Information: | Frontiers Media SA, 2023. |
| Publication Year: | 2023 |
| Subject Terms: | visuomotor processing, motor oblique effect, Movement, Sensation, dry immersion (DI), Neurosciences. Biological psychiatry. Neuropsychiatry, Neural Circuits, 150 000 MR Techniques in Brain Function, orientation, Orientation, Immersion, Humans, hypermetria, Perception, RC321-571 |
| Description: | 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. |
| Document Type: | Article Other literature type |
| ISSN: | 1662-5110 |
| DOI: | 10.3389/fncir.2023.1157228 |
| Access URL: | https://pubmed.ncbi.nlm.nih.gov/37123106 https://doaj.org/article/151dee413e174a8e8d39ff596ce71498 https://repository.ubn.ru.nl//bitstream/handle/2066/293740/293740.pdf https://hdl.handle.net/2066/293740 |
| Rights: | CC BY |
| Accession Number: | edsair.doi.dedup.....31fe59ed1e8460fa582f2a90bfa041cb |
| Database: | OpenAIRE |
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Nájsť tento článok vo Web of Science | Abstract: | 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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| ISSN: | 16625110 |
| DOI: | 10.3389/fncir.2023.1157228 |