Glowania, Catharina ; Dam, L. C. J. van ; Brenner, E. ; Plaisier, M. A. (2017)
Smooth at one end and rough at the other: influence of object texture on grasping behaviour.
In: Experimental Brain Research, 235 (9)
doi: 10.1007/s00221-017-5016-2
Artikel, Bibliographie
Dies ist die neueste Version dieses Eintrags.
Kurzbeschreibung (Abstract)
When picking up objects using a pinch grip, there are usually numerous places at which one could place the thumb and index finger. Yet, people seem to consistently place them at or close to the centre of mass (COM), presumably to minimize torque and therefore the required grip force. People also prefer to grasp objects by parallel surfaces and ones with higher friction coefficients (rough surfaces), to prevent the object from slipping when they lift it. Here, we examine the trade-off between friction and COM. Participants were asked to grasp and lift aluminium bars of which one end was polished and therefore smooth and the other was rough. Their finger positions were recorded to determine how they grasped the objects. The bars were oriented horizontally in the frontal plane, with the centre aligned with the participants’ body midline. The bars varied in the horizontal offset between the COM and the edge of the rough region. The offset could be 0, 1 or 2 cm. We expected participants to grasp closer to the rough area than the centre of the bar. Completely rough bars and completely smooth bars served as control conditions. The slipperiness of the surface that was grasped affected the height of the grasping points, indicating that participants adjusted their grasping behaviour to the slipperiness of the surface. However, the tendency to grasp closer to the rough area was minimal. This shows that the judged COM largely determines how an object is grasped. Friction has very limited influence.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2017 |
| Autor(en): | Glowania, Catharina ; Dam, L. C. J. van ; Brenner, E. ; Plaisier, M. A. |
| Art des Eintrags: | Bibliographie |
| Titel: | Smooth at one end and rough at the other: influence of object texture on grasping behaviour |
| Sprache: | Englisch |
| Publikationsjahr: | 21 Juni 2017 |
| Ort: | Berlin ; Heidelberg ; New York |
| Verlag: | Springer |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Experimental Brain Research |
| Jahrgang/Volume einer Zeitschrift: | 235 |
| (Heft-)Nummer: | 9 |
| Kollation: | 12 Seiten |
| DOI: | 10.1007/s00221-017-5016-2 |
| Zugehörige Links: | |
| Kurzbeschreibung (Abstract): | When picking up objects using a pinch grip, there are usually numerous places at which one could place the thumb and index finger. Yet, people seem to consistently place them at or close to the centre of mass (COM), presumably to minimize torque and therefore the required grip force. People also prefer to grasp objects by parallel surfaces and ones with higher friction coefficients (rough surfaces), to prevent the object from slipping when they lift it. Here, we examine the trade-off between friction and COM. Participants were asked to grasp and lift aluminium bars of which one end was polished and therefore smooth and the other was rough. Their finger positions were recorded to determine how they grasped the objects. The bars were oriented horizontally in the frontal plane, with the centre aligned with the participants’ body midline. The bars varied in the horizontal offset between the COM and the edge of the rough region. The offset could be 0, 1 or 2 cm. We expected participants to grasp closer to the rough area than the centre of the bar. Completely rough bars and completely smooth bars served as control conditions. The slipperiness of the surface that was grasped affected the height of the grasping points, indicating that participants adjusted their grasping behaviour to the slipperiness of the surface. However, the tendency to grasp closer to the rough area was minimal. This shows that the judged COM largely determines how an object is grasped. Friction has very limited influence. |
| Freie Schlagworte: | grasping, centre-of-mass, object roughness, grasp point selection |
| Sachgruppe der Dewey Dezimalklassifikatin (DDC): | 100 Philosophie und Psychologie > 150 Psychologie 600 Technik, Medizin, angewandte Wissenschaften > 610 Medizin, Gesundheit |
| Hinterlegungsdatum: | 31 Jul 2024 07:23 |
| Letzte Änderung: | 31 Jul 2024 07:36 |
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| Suche nach Titel in: | TUfind oder in Google |
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Smooth at one end and rough at the other: influence of object texture on grasping behaviour. (deposited 22 Jul 2024 13:38)
- Smooth at one end and rough at the other: influence of object texture on grasping behaviour. (deposited 31 Jul 2024 07:23) [Gegenwärtig angezeigt]
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