Neck osteoarthritis in Eremotherium laurillardi (Lund, 1842; Mammalia, Xenarthra) from the Late Pleistocene of Brazil.

Autor: Barbosa FHS; Programa de Pós-Graduação em Geologia, Departamento de Geologia, Instituto de Geociências, Universidade Federal do Rio de Janeiro, Av. Athos da Silveira Ramos, 274, Ilha do Fundão, 21941-916, Rio de Janeiro, RJ, Brazil. Electronic address: fhsbarbosa@gmail.com., Araújo-Júnior HI; Programa de Pós-Graduação em Geologia, Departamento de Geologia, Instituto de Geociências, Universidade Federal do Rio de Janeiro, Av. Athos da Silveira Ramos, 274, Ilha do Fundão, 21941-916, Rio de Janeiro, RJ, Brazil. Electronic address: herminio.ismael@yahoo.com.br., Oliveira EV; Departamento de Geologia, Laboratório de Paleontologia, Universidade Federal de Pernambuco, Rua Acadêmico Hélio Ramos, S/N, Cidade Universitária, Recife, PE, Brazil. Electronic address: vicenteedi@gmail.com.
Jazyk: angličtina
Zdroj: International journal of paleopathology [Int J Paleopathol] 2014 Sep; Vol. 6, pp. 60-63. Date of Electronic Publication: 2014 Feb 04.
DOI: 10.1016/j.ijpp.2014.01.001
Abstrakt: Paleopathological analyses of Brazilian Quaternary mammals remain scarce. However, this type of study can shed light on several paleoecological issues in vertebrate paleobiology and taphonomy. Here, we describe and diagnose a pathology on an axis of a ground sloth Eremotherium laurillardi (Lund, 1842) from Pernambuco State, Brazil. Through the identification of osteophytes, we define an osteoarthritic lesion in the atlantoaxial joint (C1-C2), which is unrelated to body weight support. Thus, this paper reports a peculiar allocation of osteoarthritis in a mammalian skeleton. We did not attribute such alteration to calcium pyrophosphate deposition disease (CPPD) because the bone elevation occurs only on the borders of the lateral articular facets of the axis, and not on the joint surface. This analysis shows that osteoarthritis can also occur in regions of vertebral column that are not weight-bearing, which is one of the main predisposing factors for this disease.
(Copyright © 2014 Elsevier Inc. All rights reserved.)
Databáze: MEDLINE
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