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Dogs in motion
Date:5/27/2011

The reason being: "So far scientific studies were limited mostly to the movement of sick animals or to single aspects of locomotion", says Fischer, Professor of Systematic Zoology and Evolutionary Biology. To change this, Professor Fischer and his team started a comprehensive study about the locomotion of healthy dogs in 2006 and have now presented the results.

With enormous technical effort the scientists measured, documented and compared the motion sequences of 327 dogs from 32 different breeds. The dogs were filmed by two high speed cameras in different gaits from the front and from the side. "In addition we analysed the movements three-dimensionally", Dr. Karin Lilje explains. For this, the zoologist glued reflecting markers on the skin of the animals and filmed their movements with infrared cameras. These sent out short flashes and registered their reflections. Up to 1.000 images per second went into these analyses. "As the reflections were being recorded from several cameras we could assess the position of the markers in the room from the data", Dr. Lilje continues. Additionally, the movements of the dogs were recorded with a high speed X-ray video system. The University Institute for Systematic Zoology and Evolutionary Biology, which the Phyletisches Museum is also part of, owns one of the most modern and efficient systems of this type. "By combining these three methods data about the movement of dogs are available now in a precision so far unknown", says Fischer.

Numerous displays and preparations of skeletons in today's schoolbooks and museums show how patchy and in some aspects fundamentally incorrect the knowledge about the locomotor system was until now: The displays position the hip and shoulder joint of the animals on the same level. "However this implies that these two joints correlate with each other and that they are the centre of rotation in the movement which is wrong as we could now prove with the help of our analyses",
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Contact: Ute Schoenfelder
presse@uni-jena.de
49-364-193-1041
Friedrich-Schiller-Universitaet Jena
Source:Eurekalert  

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