Diploe thickness and cranial dimensions in males and females in mid-Anatolian population: An MRI study

Sabancıoğulları, Vedat; Koşar, Mehmet İlkay; Şalk, İsmail; Erdil, F. Hayat; Öztoprak, İbrahim; Çimen, Mehmet

doi:10.1016/j.forsciint.2011.11.033

Cited by 28 publications

(25 citation statements)

References 17 publications

(39 reference statements)

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“…Following from this, development of the human skull does not cease after infancy, but continues to undergo remodelling, microstructural, density and histological changes until death, further impacting conductivity. Firstly, total cranial thickness has been observed to increase with age (Todd, 1924) notably related to increase in diploe thickness (Hatipoglu, Ozcan, Hatipoglu, & Yuksel, 2008;Sabancıoğulları et al, 2012), which in one study was accompanied with inner and outer compact thinning (Skrzat, Brzegowy, Walocha, & Wojciechowski, 2004). An increase in diploe (and hence spongiform bone) thickness would suggest conductivity of the skull to increase with age, as revealed by (Tang et al, 2008).…”

Section: Layered Skullmentioning

confidence: 99%

Variation in reported human head tissue electrical conductivity values

McCann

Pisano

Beltrachini

2019

Preprint

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Electromagnetic source characterisation requires accurate volume conductor models representing head geometry and the electrical conductivity field. Head tissue conductivity is often assumed from previous literature, however, despite extensive research, measurements are inconsistent. A meta-analysis of reported human head electrical conductivity values was therefore conducted to determine significant variation and subsequent influential factors. Of 3,121 identified publications spanning three databases, 56 papers were included in data extraction. Conductivity values were categorised according to tissue type, and recorded alongside methodology, measurement condition, current frequency, tissue temperature, participant pathology and age. We found variation in electrical conductivity of the wholeskull, the spongiform layer of the skull, isotropic, perpendicularly-and parallelly-oriented white matter (WM) and the brain-to-skull-conductivity ratio (BSCR) could be significantly attributed to a combination of differences in methodology and demographics. Specifically, whole-skull conductivity varied significantly with the employed method, whilst the spongiform layer differed with measurement condition. Grey matter conductivity fluctuated according to method and pathology, whilst isotropic WM differed according to all of the independent variables. Finally, the BSCR significantly varied with participant's age. The reported results provided evidence for head conductivity inconsistencies being dependent on methodology and demographics, supporting the hypothesis that conductivity values should not be assumed from the literature.

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Section: Layered Skullmentioning

confidence: 99%

Variation in reported human head tissue electrical conductivity values

McCann

Pisano

Beltrachini

2019

Preprint

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“…Over the last few years, the use of imaging modalities such as computed tomography (CT), magnetic resonance imaging, and ultrasonography in age estimation has been investigated alongside the reevaluation of classic techniques such as estimation based on cranial sutures [1–13]. Cranial suture closure progresses with age, and therefore, the macroscopic assessment of the surface of cranial sutures has long been used as a method of age estimation [14–17].…”

Section: Introductionmentioning

confidence: 99%

Age estimation by multidetector CT images of the sagittal suture

et al. 2013

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Closure of cranial sutures progresses with age; therefore, macroscopic assessment of cranial sutures has been used as one method of age estimation. Postmortem computed tomography (PMCT), which many forensic medical departments and institutes have begun to adopt, has the potential to simplify the gathering of information from cranial sutures for both surface and cross-sectional evaluation. To examine the feasibility of age estimation by cross-sectional multidetector computed tomography images of the sagittal suture, PMCT findings of 125 subjects of known age and sex were retrospectively reviewed. The sagittal suture was divided into four segments, and 20 cross-sectional slices from each segment were analyzed. These slices were each categorized by visual evaluation into one of the seven stages defined by Harth et al. according to the degree of closure. The mean stage value of 20 slices was calculated for each segment. We were able to evaluate cross-sectional images of the sagittal suture by PMCT, and a positive correlation between age and closure degree was observed. Despite the prediction interval achieved with this method not being superior to traditional macroscopic or flat-panel CT assessment, multidetector CT is a potentially useful tool, in conjunction with other methods, for age estimation, particularly in adult females and in cases where only a skull is the sole remain.

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“…Skrzat et al () observed some differences in the diploe density of younger and older adults due to a reduction in calcium concentration. No significant sexual differences have been described in CVT (Ross et al, ; Lynnerup, ; Lynnerup et al, ; Torres‐Lagares et al, ; Sabancıoğulları et al, ; Anzelmo et al, ).…”

mentioning

confidence: 99%

Parietal Bone Thickness and Vascular Diameters in Adult Modern Humans: A Survey on Cranial Remains

Eisová

Lázaro

Píšová

et al. 2016

The Anatomical Record

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4 Katedra antropologie a genetiky člov eka, Univerzita Karlova, Czech Republic 5 Antropologick e odd elen ı P r ırodov edeck eho muzea, Narodnı Muzeum, Prague, Czech Republic ABSTRACT Cranial bone thickness varies among modern humans, and many factors influencing this variability remain unclear. Growth hormones and physical activity are thought to influence the vault thickness. Considering that both systemic factors and energy supply influence the vascular system, and taking into account the structural and biomechanical interaction between endocranial vessels and vault bones, in this study we evaluate the correlation between vascular and bone diameters. In particular, we tested the relationship between the thickness of the parietal bone (which is characterized, in modern humans, by a complex vascular network) and the lumen size of the middle meningeal and diploic vessels, in adult modern humans. Our results show no patent correlation between the thickness of parietal bone and the size of the main vascular channels. Values and distributions of the branching patterns, as well as anatomical relationships between vessels and bones, are also described in order to provide information concerning the arrangement of the endocranial vascular morphology. This information is relevant in both evolutionary and medical contexts. Anat Rec,

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Diploe thickness and cranial dimensions in males and females in mid-Anatolian population: An MRI study

Cited by 28 publications

References 17 publications

Variation in reported human head tissue electrical conductivity values

Variation in reported human head tissue electrical conductivity values

Age estimation by multidetector CT images of the sagittal suture

Parietal Bone Thickness and Vascular Diameters in Adult Modern Humans: A Survey on Cranial Remains

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