Limb bone scaling in hopping macropods and quadrupedal artiodactyls.
Limb bone scaling in hopping macropods and quadrupedal artiodactyls.
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DOI：
10.1098/rsos.180152
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发表时间：
2018-10
影响因子：
3.5
通讯作者：
Shefelbine SJ
中科院分区：
文献类型：
--
作者：
Doube M;Felder AA;Chua MY;Lodhia K;Kłosowski MM;Hutchinson JR;Shefelbine SJ
骨适应性受机械负荷的时间、方向、速率和大小的调节。要调查是否频繁缓慢，或不经常快速，步态可以支配骨骼适应负荷，我们比较缩放的四肢骨骼从两个哺乳动物食草动物分支，使用根本不同的高速步态，双足跳跃（亚目Macropodiformes;袋鼠和亲属）和四足疾驰（偶蹄目;山羊，鹿和亲属）。前肢和后肢骨收集从20个偶蹄类和15个macropod物种（体重M1.05 -1536公斤），并在计算机断层扫描或X射线显微断层扫描。测量面积二阶矩（Imax）和骨长度（l）。计算每个骨的l与M的比例关系（y = axb），以及每5%长度的Imax与M和Imax与l的比例关系。Imax与M缩放关系的分支之间大致相似，尽管macropod前肢几乎卸载，后肢高度加载，在双足跳跃。Imax与l和l与M缩放运动和行为的专业化。低强度负荷可能足以维持各种物种的骨量。偶尔的高强度步态可能不会突破频繁的低强度步态所产生的负载灵敏度饱和。
Bone adaptation is modulated by the timing, direction, rate and magnitude of mechanical loads. To investigate whether frequent slow, or infrequent fast, gaits could dominate bone adaptation to load, we compared scaling of the limb bones from two mammalian herbivore clades that use radically different high-speed gaits, bipedal hopping (suborder Macropodiformes; kangaroos and kin) and quadrupedal galloping (order Artiodactyla; goats, deer and kin). Forelimb and hindlimb bones were collected from 20 artiodactyl and 15 macropod species (body mass M 1.05–1536 kg) and scanned in computed tomography or X-ray microtomography. Second moment of area (Imax) and bone length (l) were measured. Scaling relations (y = axb) were calculated for l versus M for each bone and for Imax versus M and Imax versus l for every 5% of length. Imax versus M scaling relationships were broadly similar between clades despite the macropod forelimb being nearly unloaded, and the hindlimb highly loaded, during bipedal hopping. Imax versus l and l versus M scaling were related to locomotor and behavioural specializations. Low-intensity loads may be sufficient to maintain bone mass across a wide range of species. Occasional high-intensity gaits might not break through the load sensitivity saturation engendered by frequent low-intensity gaits.
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影响因子：
2.6
作者：
Blob, Richard W.;Espinoza, Nora R.;Sheffield, K. Megan
通讯作者：
Sheffield, K. Megan
DOI：
10.1098/rspb.2011.0069
发表时间：
2011-10-22
期刊：
Proceedings. Biological sciences
影响因子：
--
作者：
Doube M;Klosowski MM;Wiktorowicz-Conroy AM;Hutchinson JR;Shefelbine SJ
通讯作者：
Shefelbine SJ
影响因子：
3.7
作者：
Berman AG;Clauser CA;Wunderlin C;Hammond MA;Wallace JM
通讯作者：
Wallace JM
影响因子：
1.7
作者：
CLANCY, TF;CROFT, DB
通讯作者：
CROFT, DB
影响因子：
3.3
作者：
Conte, S.;Bergeron, R.;Devillers, N.
通讯作者：
Devillers, N.