Posterior arch defect in a dry atlas

Sanchis‐Gimeno, Juan A.; Aparicio, Luis

doi:10.1007/s00586-011-1715-8

Cited by 5 publications

(6 citation statements)

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“…1994; Senoglu et al . 2007; Sanchis‐Gimeno and Aparicio, 2011; Jin et al , 2014; Sanchis‐Gimeno et al . 2018b), and has been described in the El Sidrón Neanderthal group (Ríos et al .…”

Section: Discussionmentioning

confidence: 99%

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Krapina atlases suggest a high prevalence of anatomical variations in the first cervical vertebra of Neanderthals

et al. 2020

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The first cervical vertebra, atlas, and its anatomical variants have been widely studied in Homo sapiens. However, in Neanderthals, the presence of anatomical variants of the atlas has been very little studied until very recently. Only the Neanderthal group from the El Sidrón site (Spain) has been analysed with regard to the anatomical variants of the atlas. A high prevalence of anatomical variants has been described in this sample, which points to low genetic diversity in this Neanderthal group. Even so, the high prevalence of anatomical variations detected in El Sidrón Neanderthal atlases needs to be confirmed by analysing more Neanderthal remains. In this context, we analysed the possible presence of anatomical variants in the three Neanderthal atlases recovered from the Krapina site (Croatia) within the Neanderthal lineage. Two of the three Krapina atlases presented anatomical variations. One atlas (Krapina 98) had an unclosed transverse foramen and the other (Krapina 99) presented a non‐fused anterior atlas arch. Moreover, an extended review of the bibliography also showed these anatomical variations in other Middle and Upper Pleistocene hominins, leading us to hypothesise that anatomical variations of the atlas had a higher prevalence in extinct hominins than in modern humans.

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Section: Discussionmentioning

confidence: 99%

“…1994; Le Minor, 1997; Klimo et al . 2003; Sanchis‐Gimeno and Aparicio, 2011; Sanchis‐Gimeno et al . 2014; Unlu et al .…”

Section: Introductionmentioning

confidence: 99%

Krapina atlases suggest a high prevalence of anatomical variations in the first cervical vertebra of Neanderthals

et al. 2020

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“…The lateral ossification centers appear at the seventh week of embriyonic development and they extend dorsally to form the posterior arch (7) . At birth, the two hemiarches are almost fused, excepting a gap of few milimeters (7,8) . The fusion is completed between 4-9 years of life (3,7) .…”

Section: Discussionmentioning

confidence: 99%

“…Posterior arch defects are considered as a developmental failure of chondrogenesis of the arch, rather than a defect in the subsequent ossification (3,6,7) . Congenital defects of the C1 posterior arch are generally asymptomatic and diagnosed incidentally on neuroimaging studies (8) . Currarino et al proposed a classification for these defects (2) : Type A (failure of posterior midline fusion of the two hemiarches with a small gap), Type B (unilateral defect ranging from small gap to complete absence of a hemiarch), Type C (bilateral defect with preservation of the most dorsal part), Type D (absence of posterior arch, with persistent posterior tubercle), Type E (absence of the entire arch, including the tubercle).…”

Section: Discussionmentioning

confidence: 99%

Epidermoid tumor of the fourth ventricle with accompanying congenital posterior arch defect of the atlas

Akçakaya

Altunrende

Navruz

et al. 2018

sscd

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Epidermoid tumors are rarely encountered within the fourth ventricle. There are slightly more than 100 cases reported in the literature. Congenital posterior arch defects of the atlas are also rare with less than 50 cases reported in the literature. The coexistence of these two pathologies in one patient has not been previously reported. We present a 51-year-old-woman with an epidermoid tumor of the fourth ventricle and accompanying posterior arch defect of the atlas.

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“…On the other hand, visual examination of human skeletons provides us with a unique opportunity to discover and describe posterior atlas arch defects [4]. In addition, theoretically, it should not be difficult to distinguish between an atlas fracture and a posterior arch defect in the postmortem study of dry atlases; this is not, however, as easy as might be expected in a dry cadaveric vertebra.…”

Section: Introductionmentioning

confidence: 99%

Difficulties in distinguishing between an atlas fracture and a congenital posterior atlas arch defect in postmortem analysis

Sanchis‐Gimeno

Blanco-Pérez

Aparicio

et al. 2014

Forensic Science International

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Posterior arch defect in a dry atlas

Cited by 5 publications

References 4 publications

Krapina atlases suggest a high prevalence of anatomical variations in the first cervical vertebra of Neanderthals

Krapina atlases suggest a high prevalence of anatomical variations in the first cervical vertebra of Neanderthals

Epidermoid tumor of the fourth ventricle with accompanying congenital posterior arch defect of the atlas

Difficulties in distinguishing between an atlas fracture and a congenital posterior atlas arch defect in postmortem analysis

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