Journal of Veterinary Medical Science
Online ISSN : 1347-7439
Print ISSN : 0916-7250
ISSN-L : 0916-7250
Wildlife Science
Mobility of the forearm in the raccoon (Procyon lotor), raccoon dog (Nyctereutes procyonoides) and red panda (Ailurus fulgens)
Minao KAMIOKAMotoki SASAKIKazutaka YAMADAHideki ENDOMotoharu OISHIKazutoshi YUHARASohei TOMIKAWAMiki SUGIMOTOTatsuo OSHIDADaisuke KONDOHNobuo KITAMURA
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2017 Volume 79 Issue 1 Pages 224-229

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Abstract

The ranges of pronation/supination of forearms in raccoons, raccoon dogs and red pandas were nondestructively examined. Three carcasses of each species were used for CT analysis, and the left forearms were scanned with a CT scanner in two positions: maximal supination and maximal pronation. Scanning data were reconstructed into three-dimensional images, cross-sectional images were extracted at the position that shows the largest area in the distal part of ulna, and then, the centroids of each cross section of the radius and ulna were detected. CT images of two positions were superimposed, by overlapping the outlines of each ulna, and then, the centroids were connected by lines to measure the angle of rotation, as an index of range of mobility. The measurements in each animal were analyzed, using the Tukey–Kramer method. The average angle of rotation was largest in raccoons and smallest in raccoon dogs, and the difference was significant. In the maximally pronated forearm of all species, the posture was almost equal to the usual grounding position with palms touching the ground. Therefore, the present results demonstrate that the forearms of raccoons can supinate to a greater degree from the grounding position with palms on the ground, as compared with those of raccoon dogs and red pandas.

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この記事はクリエイティブ・コモンズ [表示 - 非営利 - 改変禁止 4.0 国際]ライセンスの下に提供されています。
https://creativecommons.org/licenses/by-nc-nd/4.0/deed.ja
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