华盛顿格兰特县法国山- tonnemaker猛犸象遗址外伤性肋骨骨折1例报告

IF 0.5 4区 环境科学与生态学 Q4 ECOLOGY
G. V. Last, Katherine Newhall-Perry, Rosalie L. Faubion, N. Mara, Bax R. Barton
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引用次数: 0

摘要

在华盛顿格兰特县皇家城北部法国丘陵的Tonnemaker Hill农场的一片苜蓿地里,从100多块猛犸象骨头中发现了一根哥伦比亚猛犸象(Mammuthus columbi)的变形肋骨。猛犸象的遗骸是在16万年后的某个时间沉积在密苏拉细粒度的洪水沉积物中。我们对肋骨进行了详细的检查,包括计算机断层成像,并调查了畸形的可能病因。畸形包括位于肋骨远端(胸骨)的肥厚骨形成。病灶的周长几乎是肋骨内侧周长的两倍。该病变符合骨折未完全愈合或骨折不愈合伴假关节形成。对肋骨近端的大体检查和计算机断层扫描图像,以及对其他骨骼遗骸的粗略检查,尚未发现其他骨骼异常的明确证据。因此,我们推测,这是健康动物钝力创伤的结果。据我们所知,这是太平洋西北部哥伦比亚分枝杆菌个体肋骨骨折愈合不完全或假关节形成的第一例报告。我们怀疑哥伦比亚分枝杆菌肋骨骨折的发生率高于太平洋西北地区的文献,并鼓励对现有收集的证据进行检查,以获得类似的发现。这种伤害的发生率和频率可以提供对M. columbi行为的深入了解。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Case Report of Traumatic Rib Fracture in Mammoth from Frenchman Hills–Tonnemaker Mammoth Site, Grant County, Washington
Abstract A deformed rib from a Columbian mammoth (Mammuthus columbi) was found among more than 100 mammoth bones excavated from an alfalfa field at the Tonnemaker Hill Farm in the Frenchman Hills north of Royal City, Grant County, Washington. The mammoth remains were deposited within fine-grained Missoula flood sediments sometime after 16 ka. We performed a detailed examination of the rib, including computerized tomography imaging, and investigated the possible etiology of the deformity. The deformity consists of hypertrophic bone formation localized toward the distal (sternal) end of the rib. The circumference of the lesion is nearly twice that of the medial circumference of the rib diaphysis. This lesion is consistent with an incompletely healed fracture or a fracture nonunion with pseudarthrosis (false joint) formation. Gross examination and computerized tomography scan images of the proximal aspect of the rib, as well as cursory inspection of the other skeletal remains, have yet to reveal definitive evidence of other bony abnormalities. We surmise, therefore, that this fracture was the consequence of blunt force trauma in a healthy animal. To our knowledge, this is the first report of a rib fracture with incomplete healing or false joint formation in a M. columbi individual in the Pacific Northwest. We suspect the incidence of rib fractures among M. columbi was greater than the Pacific Northwest literature suggests and encourage examination of existing collections for evidence of similar findings. The incidence and frequency of such injuries may provide insight into M. columbi behavior.
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来源期刊
Northwest Science
Northwest Science 环境科学-生态学
CiteScore
1.30
自引率
0.00%
发文量
23
审稿时长
>36 weeks
期刊介绍: The pages of Northwest Science are open to original and fundamental research in the basic, applied, and social sciences. All submissions are refereed by at least two qualified peer reviewers. Papers are welcome from authors outside of the Pacific Northwest if the topic is suitable to our regional audience.
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