Changes in emotional state while holding a slimy fluid in the palmar skin
Various effects have been observed when a slimy fluid is held in palmar skin. The observed effects include friction control of the skin and cleansing and moisturizing of the skin. However, few reports exist regarding the changes in the emotional state of persons when a slimy fluid is held in their p...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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The Japan Society of Mechanical Engineers
2021-07-01
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| Series: | Journal of Biomechanical Science and Engineering |
| Subjects: | |
| Online Access: | https://www.jstage.jst.go.jp/article/jbse/16/4/16_20-00531/_pdf/-char/en |
| _version_ | 1818532544096763904 |
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| author | Yoshitaka NAKANISHI Shou HOSOKAWA Yuta NAKASHIMA |
| author_facet | Yoshitaka NAKANISHI Shou HOSOKAWA Yuta NAKASHIMA |
| author_sort | Yoshitaka NAKANISHI |
| collection | DOAJ |
| description | Various effects have been observed when a slimy fluid is held in palmar skin. The observed effects include friction control of the skin and cleansing and moisturizing of the skin. However, few reports exist regarding the changes in the emotional state of persons when a slimy fluid is held in their palmar skin, even though the viscosity properties of the fluid affect emotional changes. Thus, this study investigates the emotional changes due to holding slimy fluid in the palmar skin by evaluating heart rate variability (HRV) and sensibility. Newtonian and non-Newtonian fluids, with viscosities ranging from 0.01 to 100 Pa·s, were prepared. Eight male subjects in their 20s soaked their palms in the slimy fluid without seeing it. At the room temperature of 25 °C, the subjects moved their palms freely for 1 min. They were allowed to rub their palms together. During the experiments, the HRV was recorded. A frequency analysis was performed for estimating autonomic nerve activity. After holding the fluid, the subjects were asked to provide feedback through the semantic differential method. Significant changes in autonomic nerve activations were observed when the subjects soaked their palms in the slimy fluid. The high viscosity Newtonian fluid reduced the parasympathetic nervous system activity. These changes in the psychophysiological indexes influenced the feelings of the subjects ascertained according to the semantic differential method. A relationship between the characteristic of the slimy fluid and a psychophysiological index can improve the efficiency when developing products exposed to human skin. |
| first_indexed | 2024-12-11T17:46:54Z |
| format | Article |
| id | doaj.art-f6179c7b1fa74abcab720d203c4744a2 |
| institution | Directory Open Access Journal |
| issn | 1880-9863 |
| language | English |
| last_indexed | 2024-12-11T17:46:54Z |
| publishDate | 2021-07-01 |
| publisher | The Japan Society of Mechanical Engineers |
| record_format | Article |
| series | Journal of Biomechanical Science and Engineering |
| spelling | doaj.art-f6179c7b1fa74abcab720d203c4744a22022-12-22T00:56:21ZengThe Japan Society of Mechanical EngineersJournal of Biomechanical Science and Engineering1880-98632021-07-0116420-0053120-0053110.1299/jbse.20-00531jbseChanges in emotional state while holding a slimy fluid in the palmar skinYoshitaka NAKANISHI0Shou HOSOKAWA1Yuta NAKASHIMA2Faculty of Advanced Science and Technology, Kumamoto UniversityGraduate School of Advanced Science and Technology, Kumamoto UniversityFaculty of Advanced Science and Technology, Kumamoto UniversityVarious effects have been observed when a slimy fluid is held in palmar skin. The observed effects include friction control of the skin and cleansing and moisturizing of the skin. However, few reports exist regarding the changes in the emotional state of persons when a slimy fluid is held in their palmar skin, even though the viscosity properties of the fluid affect emotional changes. Thus, this study investigates the emotional changes due to holding slimy fluid in the palmar skin by evaluating heart rate variability (HRV) and sensibility. Newtonian and non-Newtonian fluids, with viscosities ranging from 0.01 to 100 Pa·s, were prepared. Eight male subjects in their 20s soaked their palms in the slimy fluid without seeing it. At the room temperature of 25 °C, the subjects moved their palms freely for 1 min. They were allowed to rub their palms together. During the experiments, the HRV was recorded. A frequency analysis was performed for estimating autonomic nerve activity. After holding the fluid, the subjects were asked to provide feedback through the semantic differential method. Significant changes in autonomic nerve activations were observed when the subjects soaked their palms in the slimy fluid. The high viscosity Newtonian fluid reduced the parasympathetic nervous system activity. These changes in the psychophysiological indexes influenced the feelings of the subjects ascertained according to the semantic differential method. A relationship between the characteristic of the slimy fluid and a psychophysiological index can improve the efficiency when developing products exposed to human skin.https://www.jstage.jst.go.jp/article/jbse/16/4/16_20-00531/_pdf/-char/enslimy liquidnewtonian fluidnon newtonian fluidskinemotionsr-r intervalsympathetic nerveparasympathetic nerve |
| spellingShingle | Yoshitaka NAKANISHI Shou HOSOKAWA Yuta NAKASHIMA Changes in emotional state while holding a slimy fluid in the palmar skin Journal of Biomechanical Science and Engineering slimy liquid newtonian fluid non newtonian fluid skin emotions r-r interval sympathetic nerve parasympathetic nerve |
| title | Changes in emotional state while holding a slimy fluid in the palmar skin |
| title_full | Changes in emotional state while holding a slimy fluid in the palmar skin |
| title_fullStr | Changes in emotional state while holding a slimy fluid in the palmar skin |
| title_full_unstemmed | Changes in emotional state while holding a slimy fluid in the palmar skin |
| title_short | Changes in emotional state while holding a slimy fluid in the palmar skin |
| title_sort | changes in emotional state while holding a slimy fluid in the palmar skin |
| topic | slimy liquid newtonian fluid non newtonian fluid skin emotions r-r interval sympathetic nerve parasympathetic nerve |
| url | https://www.jstage.jst.go.jp/article/jbse/16/4/16_20-00531/_pdf/-char/en |
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