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DOI: 10.1055/s-0031-1271805
© Georg Thieme Verlag KG Stuttgart · New York
Erfassung der Kraftprofile verschiedener primärer Griffe durch dynamische Kraftmessung mit einem Sensorhandschuh
Assessment of Force Patterns of Different Primary Grips through Dynamic Force Measurement using a Sensor GlovePublication History
eingereicht 29.5.2010
akzeptiert 29.1.2011
Publication Date:
30 March 2011 (online)
![](https://www.thieme-connect.de/media/hamipla/201103/lookinside/thumbnails/10.1055-s-0031-1271805-1.jpg)
Zusammenfassung
In der vorliegenden Arbeit werden primäre Griffe anhand differenzierter Kraftverteilungsmuster analysiert. Die Untersuchung erfolgte mit dem TUB-Sensorhandschuh, der mit 10 Drucksensoren ausgerüstet war. 5 proximale Sensoren sind beugeseitig über den Grundgelenken und 5 distale Sensoren beugeseitig an den Fingerendgliedern befestigt. 9 Griffe werden untersucht: der Kraftgriff in 4 Varianten, der Spitzgriff, der Präzisionsgriff und der Feingriff in 3 Varianten. 10 Probanden nehmen an der Studie teil. Die Kraftverteilungsmuster der 9 Griffe lassen sich eindeutig in 2 Gruppen unterteilen. Auf der einen Seite stehen die Kraftgriffe, deren Kraftverteilungsmuster sich aus den an proximalen und an distalen Sensoren gemessenen Kräften zusammensetzen. Auf der anderen Seite stehen der Spitz-, der Präzisions- und die Feingriffe, deren Kraftverteilungsmuster nur aus an distalen Sensoren gemessenen Kräften bestehen. Damit wird Napiers auf Anschauung beruhendes Konzept der 2 dominierenden funktionellen Greifmuster messtechnisch bestätigt. Innerhalb der Kraftgriffe verlagert sich mit zunehmender Größe der Greifkörper die Kraftaufnahme immer weiter nach distal, sodass sich ihre Kraftverteilungsmuster denen der Präzisionsgriffe annähern. Am Kleinfinger überwiegt der distale Sensor bereits bei den Kraftgriffen mit kleinen Greifkörpern. Der Daumen ist bei Kraftgriffen mit kleinen Greifkörpern zunächst von untergeordneter Bedeutung, da der Griff noch sehr dem Faustschluss ähnelt und der Greifkörper zwischen den Fingern und der Hohlhand eingeklemmt gehalten werden kann. Mit zunehmender Größe der Greifkörper wird er immer wichtiger, da seine Oppositionsstellung die Voraussetzung für die Durchführung des Griffs darstellt.
Abstract
The present study analyses force distribution patterns during primary grips. 10 subjects were examined using the TUB-sensor glove, which was equipped with 10 pressure sensors. 5 proximal sensors at the MCP joints and 5 distal sensors at the DIP joints were attached palmarly. 9 different gripping motions were examined: the cylinder grip using 4 different objects, the pinch grip and 4 different kinds of precision grips. The force distribution patterns can be clearly divided into 2 groups. On the one hand there are the “power grips”, in which the force is distributed over the proximal and distal sensors. On the other hand there are the “precision grips”, which only show a force distribution at the distal sensors. Therefore Napier's concept of the existence of primarily 2 gripping patterns, which is based on visual analysis, can be verified objectively. For the “power grips” the force distribution is shifted further distally with increasing size of the objects. In conclusion, their distribution pattern shifts towards the pattern of the “precision grips”. At the small finger the distal sensor is already dominant during the “power grips” of smaller objects. The thumb plays a subordinate role during the “power grip” of smaller objects, since these grips are similar to the “closing fist motion” and the objects can be held between the fingers and the palm of the hand. However, with increasing object sizes the thumb gains more importance, since its opposing movement is now required to accomplish the grip.
Schlüsselwörter
Kraftmessung - primäre Griffe - Sensorhandschuh - Kraftverteilungsmuster
Key words
power measurement - primary grips - sensor glove - force distribution patterns
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Korrespondenzadresse
Dr. Joachim Gülke
Universitätsklinik Ulm
Unfallchirurgie,
Hand-, Plastische und
Wiederherstellungschirurgie
Steinhövelstraße 9
89075 Ulm
Email: joachim.guelke@uniklinik-ulm.de