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Bilateral asymmetry in bone weight at various skeletal sites of the rat

Fox, Kathleen M. ; Kimura, Sumiko ; Plato, Chris C. ; Kitagawa, Tadashi

Anatomical Record, February 1995, Vol.241(2), pp.284-287 [Peer Reviewed Journal]

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  • Title:
    Bilateral asymmetry in bone weight at various skeletal sites of the rat
  • Author: Fox, Kathleen M. ; Kimura, Sumiko ; Plato, Chris C. ; Kitagawa, Tadashi
  • Description: : Morphological and funtional asymmery in the limbs has generally been regarded as a human characteristic that is of genetic or of the geneic and environmental origin. The aim of this study was to determine the presence of lateral dominance in bone weight of the forelimb of the rat. : Wistar rats (77) were used, 45 Controls and 32 experimental animals, implanted with a steel weight subcutaneously under the light forelimb. Bones exmined for bilateral asymmetry in bone weight were the mandibula, the bones of fore‐ and hindlimbs, calcaneus, and talus of the tarsus. The Weight of eact dr done was measured to the nearest milligram. : Significant bilateral asymmetry in the forelimb was evident in male and female rats, with the left sidehaving more bone mass than the right. Bilaterial difference were more pronounced in the females than the male rats. Greater asymmetr was evident in the experimental group compared to the control rats. : These findings demonstrate that asymmetry is present not only in humans, but also in lower animals such as rats. Greater asymmery in the experiemntal rat group is indicative of the influence of environmental factors or physical stress on asymmetry. We conclude that genetics might control the development of asymmetr, but physical stress may alter the functional expression of the asymmetry. © 1995 Wiley‐Liss, Inc.
  • Is Part Of: Anatomical Record, February 1995, Vol.241(2), pp.284-287
  • Identifier: ISSN: 0003-276X ; E-ISSN: 1097-0185 ; DOI: 10.1002/ar.1092410215
  • Subjects: Bilateral Asymmetr ; Bone Weight ; Rat Skeleton
  • Language: English

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