Surface bone histology of the occipital bone in humans and chimpanzees

Mowbray, Ken

doi:10.1002/ar.b.20055

Cited by 25 publications

(15 citation statements)

References 20 publications

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“…The mendosal suture, thus, develops in the region of the posterolateral (mastoid) fontanelle (Nakahara et al, 2003). Mowbray (2005), using the mendosal suture as a landmark, has found that just inferior to this suture that large areas of resting resorption is observed on the superior aspect of the cerebellar fossa in man. This author also found that just inferior to the mendosal suture resting resorption occurs, but on the inferior aspect of the cerebellar fossa in Pan.…”

Section: Discussionmentioning

confidence: 98%

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Does the mendosal suture exist in the adult?

2005

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There is a paucity of information in the literature regarding the mendosal suture. Furthermore, reports of the closure of this presumed suture of childhood are variable. This study seeks to establish the presence or absence of this structure in the adult. Fifty adult skulls were evaluated for the presence or absence of the mendosal suture. Sixteen percent of specimens were found to have a mendosal suture. Six specimens were found to have these sutures bilaterally, and two had sutures on the right side only. Most sutures were linear in nature. The mendosal suture approximated the superior nuchal line in all specimens and more or less traveled medial and perpendicular to the lambdoidal suture. The length of these sutures ranged from 0.8 to 1.4 cm (1.1 cm). Our hopes are that these data will prove useful to both the anatomist and clinicians, so that, when present, misinterpretation of the mendosal suture will be avoided.

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Section: Discussionmentioning

confidence: 98%

“…The occipital bone arises from six ossification centers (Lang, 1983;Mowbray, 2005). The interparietal portion develops from two centers.…”

Section: Discussionmentioning

confidence: 99%

Does the mendosal suture exist in the adult?

2005

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“…En general, los estudios de paleohistología de superficies óseas se han centrado en alcanzar una mayor exactitud en el registro de los rasgos característicos de cada tipo de actividad celular. En este sentido, se ha evaluado la performance de distintas técnicas de preparación del material y de diversos instrumentos para la observación de superficies óseas en el reconocimiento de campos de modelado óseo (Bromage, 1984;Mowbray, 2005;Martinez-Maza et al, 2010). Sin embargo, es importante evaluar también la precisión con la que se obtienen los datos, para garantizar así la consistencia de las observaciones .…”

Section: Discussionunclassified

“…En base a descripciones establecidas en trabajos anteriores (Boyde, 1972;Bromage, 1984;Mowbray, 2005;Martinez-Maza et al, 2010), se identificaron tres tipos de superficies: 1) Formación ósea: producto de la actividad de los osteoblastos (Fig. 2a).…”

Section: Registro Paleohistológicounclassified

“…These results provide a framework for assessing the reliability of paleohistological observations in future studies. Rev Arg Antrop Biol 18(2), 2016. doi:10.17139/raab.2016.0018.02.07 El análisis microscópico de superficies óseas craneofaciales ha sido aplicado en distintos estudios orientados, por ejemplo, al análisis de patrones de crecimiento, a la evaluación de procesos posdepositacionales y la a caracterización y determinación de especies actuales y extintas (Enlow, 1966;Bromage, 1984Bromage, , 1989O'Higgins et al, 1991; Enlow y Hans, 1996;Mowbray, 2005; Martinez Maza et al, 2006, 2011McCollum, 2008; Rosas y Martinez-Maza, 2010). Tanto la forma como el tamaño del hueso observable a nivel morfológico, resultan de la actividad diferencial de formación de los osteoblastos y de reabsorción de los osteoclastos (Enlow y Hans, 1996).…”

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Error Intraobservador en El Análisis Paleohistológico De Superficies Craneofaciales

Aporta¹

2016

rev arg antrop biol

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RESUMEN En el análisis histológico de las superficies óseas craneofaciales se registran rasgos microestructurales producidos por la actividad de modelado óseo, así como otros rasgos no vinculados al crecimiento normal (alteraciones tafonómi-cas). La identificación de las áreas producto de la actividad celular, así como la determinación de su distribución y su extensión total, puede estar sujeta a diversas fuentes de error. En este sentido, el objetivo del presente trabajo es evaluar el error intraobservador en el relevamiento de las microestructuras correspondientes a formación y reabsorción sobre superficies óseas craneofaciales vinculadas al modelado óseo. Para ello se realizó un diseño observacional de bloques completos aleatorios con medidas repetidas a partir de réplicas de alta resolución de la glabela, el malar y el maxilar observadas PalabRaS clavE error de observación; diseño experimental; superficies de modelado óseo al microscopio de luz incidente. Los resultados permitieron detectar la existencia de tendencias en las observaciones a través del tiempo, así como diferencias en el reconocimiento según el tipo de superficie ósea y la región analizada. En general, se registró un aumento de la concordancia a través de las repeticiones en la observación del tipo de actividad y en la cuantificación de la extensión de las áreas de formación y reabsorción. Asimismo, se observó que presentan mayor dificultad en su análisis los rasgos asociados a la actividad de reabsorción así como las regiones con topografía abrupta, como la región maxilar. Estos resultados proveen un marco de referencia para evaluar la confiabilidad de las observaciones en futuros estudios paleohistológicos. Rev Arg Antrop Biol 18(2), 2016. doi:10.17139/raab.2016.0018.02.07KEywoRdS measurement error; experimental design; bone modeling surface abSTRacT Histological analysis of craniofacial bone surfaces reveals microstructural features produced by the activity of bone modeling, as well as other features not related to normal growth (taphonomic alterations). Identifying the areas produced by cell activity and determining their total size and distribution may be subject to various sources of error. In this sense, the objective of this study is to evaluate intraobserver error in the analysis of microstructures corresponding to formation and resorption on craniofacial bone surfaces linked to bone modeling. To this end an experimental random complete block design with repeated measurements was performed using high-resolution replicas of the glabella, malar and maxilla observed at incident light microscope. The type and extension of each cell activity-formation and resorptionwere registered. The results revealed the existence of trends in observations over time, as well as differences in the recognition by type of bone surface and region analyzed. In general, an increased consistency across repetitions in the observation of the type of activity and in the quantification of formation and resorption areas was recorded. It could also be observed that t...

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Ontogenetic changes of diploic channels in modern humans

Lázaro

Neubauer

Gunz

et al. 2020

American J Phys Anthropol

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ObjectivesThe diploic channels are bony passages of veins, running within frontal, parietal, and occipital bones. In this study, we investigate ontogenetic changes of these channels in a sample of nonadult and adult modern humans.Materials and methodsUsing computed tomography scans of dried crania, we provide quantitative comparisons of lumen size, branch length, volume, and vascular asymmetries, and correlations with age, cranial size, and bone thickness.ResultsThe vascular system displays progressive but nonlinear changes throughout ontogeny, becoming even more complex with adulthood. Vascular variables are significantly different in frontal, parietal, and occipital bones for most of the postnatal ontogeny. Diploic channels of the left and right sides are developed similarly. Vascular variables display a nonlinear association with age and cranial size in modern humans. Cranial bone thickness is shown to be a major determinant of lumen size, branch length, and volume.ConclusionsA previous radiographic survey suggested that diploic channels are more developed in adult modern humans than in nonadults. Recent advances in digital anatomy have been used in this study to investigate this craniovascular structure. The complexity of the channels increases during development, with a noticeable boost in adults. Taking into account the potential metabolic differences and constraints associated with modern human brain size and shape, the vascular differences found might be related to endocranial thermoregulation.

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Surface bone histology of the occipital bone in humans and chimpanzees

Cited by 25 publications

References 20 publications

Does the mendosal suture exist in the adult?

Does the mendosal suture exist in the adult?

Error Intraobservador en El Análisis Paleohistológico De Superficies Craneofaciales

Ontogenetic changes of diploic channels in modern humans

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