Sex estimation of the sternum by automatic image processing of multi-slice computed tomography images in a Croatian population sample: a retrospective study.

AIM: To determine the sexual dimorphism of the sternum with standard measurements in a contemporary Croatian population sample using multi-slice computed tomography (MSCT) and to compare the data obtained by an automatic with those obtained by a manual approach. METHODS: Five sternal measurements were obtained from MSCT images of 73 men and 55 women and three sternal indices were calculated. Custom image analysis software was developed for automatic segmentation and calculation of sternal measurements. Measurements of sexual dimorphism were automatically calculated and compared with manual measurements. RESULTS: All of the sternal measurements exhibited significant differences between men and women. The discrepancies between manual and automatic measurements ranged from 2.8% to 3.6% of the mean average values obtained with the automatic approach. The most accurate single-variable discriminant function was sternal body length (82.8%), the most accurate index was sternal area (89.1%), and the discriminant function using three variables was manubrium width, sternal body length, and sternal body width (90.6%). CONCLUSION: Sternal measurements are a reliable sex indicator and can be used in forensic casework. Computer-aided measurement methods can accelerate sex estimation and improve its precision and accuracy.

Articular Eminence Inclination in Medieval and Contemporary Croatian Population

Articular eminence inclination (AEI) of the temporomandibular joint leads the mandible in its movements. Therefore, the aim of the present study was to determine AEI values in medieval (MP) and recent (RP) Croatian population. The study was carried out on two groups of specimens: first group with 30 MP human dry skulls, while the other, serving as control group consisted of 137 dry skulls. The AEI was measured on lateral digital skull images as the angle between the best fi t line drawn along the posterior wall of the articular eminence and the Frankfurt horizontal plane. No statistically significant (p>0.05) differences between the left and right side AEI were found between MP skulls and RP skulls. The mean value of MP AEI was 45.5˚, with a range of 20.9˚-64˚. The mean RP AEI value was steeper (61.99˚), with a range of 30˚-94˚. Difference between the mean MP and RP AEI values was statistically significant (p<0.05). Values of AEI vary a lot. Nonsignificant differences between the left and right side AEI confirmed the natural left-right side asymmetry. The values of AEI differ between the RP and MP groups, most probably due to different type of food consumption in medieval time, and consequently different masticatory loads and forces.

Tracing the genetic origin of Europe's first farmers reveals insights into their social organization.

Farming was established in Central Europe by the Linearbandkeramik culture (LBK), a well-investigated archaeological horizon, which emerged in the Carpathian Basin, in today's Hungary. However, the genetic background of the LBK genesis is yet unclear. Here we present 9 Y chromosomal and 84 mitochondrial DNA profiles from Mesolithic, Neolithic Starcevo and LBK sites (seventh/sixth millennia BC) from the Carpathian Basin and southeastern Europe. We detect genetic continuity of both maternal and paternal elements during the initial spread of agriculture, and confirm the substantial genetic impact of early southeastern European and Carpathian Basin farming cultures on Central European populations of the sixth-fourth millennia BC. Comprehensive Y chromosomal and mitochondrial DNA population genetic analyses demonstrate a clear affinity of the early farmers to the modern Near East and Caucasus, tracing the expansion from that region through southeastern Europe and the Carpathian Basin into Central Europe. However, our results also reveal contrasting patterns for male and female genetic diversity in the European Neolithic, suggesting a system of patrilineal descent and patrilocal residential rules among the early farmers.

Alagille syndrome case report: implications for forensic pathology and anthropology.

This case report offers a multidisciplinary interpretation of the violent death of a 4-year-old girl suffering from Alagille syndrome who died after a low-height fall that resulted in temporal bone fracture and a large epidural hematoma. The article evidences the macroscopical and microscopical characteristics of the syndrome, focusing especially on the skeletal findings that emerged during autopsy. In the case report, distinction is made between a possible accidental or non-accidental nature of the injuries and the characteristics of the injury have been interpreted in the light of the existing data on Alagille syndrome. In conclusion, the death was documented as accidental since abnormalities in the skeletal system evidenced during autopsy have predisposed the death of the child albeit through a very mild head trauma. The case report evidences the importance of studying features of skull macro- and microstructure in patients with Alagille syndrome, which have been, until now, underreported in literature and which might contribute to fracture vulnerability in these patients. Although rare, Alagille syndrome is a condition that should be known to forensic medicine practitioners and whose features and peculiarities must be taken into consideration in pediatric autopsy and suspected child abuse cases.

Evaluating sexual dimorphism in the human mastoid process: A viewpoint on the methodology.

The mastoid process is one of the most sexually dimorphic features in the human skull, and is therefore often used to identify the sex of skeletons. Numerous techniques for assessing variation in the size and shape of the mastoid process have been proposed and implemented in osteological research, but its complex form still presents difficulties for consistent and effective analysis. In this article, we compare the different techniques and variables that have been used to define, measure, and visually score sexual dimorphism in the mastoid process. We argue that the current protocols fail to capture the full morphological range of this bony projection, and suggest ways of improving and standardizing them, regarding both traditional and 3D-based approaches.

Analysis and comparison of tooth wear in late antiquity and early middle age in populations that lived in continental and coastal Croatia using digitized VistaMetrix method.

BACKGROUND: Tooth wear is a non-pathological loss of hard tissues on the incisal and occlusal tooth surface. In archaeology, the loss of dental tissue through attrition is associated with living opportunities and habits, availability, characteristics and methods of food preparation. In forensics, tooth wear is used to estimate the dental age on cadavers. MATERIAL AND METHODS: For this study, we used an archaeological sample from two sample collections. In this study, tooth wear was compared in archaeological samples of well-preserved maxilla and mandible specimens (n=392) from Croatian coastal and continental populations from Late Antiquity (LA) and the Early Middle Ages (EMA). The computer system VistaMetrix 1.38 was used to analyse the abrasion and attrition of hard dental tissues. The Shapiro-Wilk and chi-square tests were performed for categorical data to test the difference between two historical periods and two geographical locations, while the Kruskal-Wallis test was performed for continuous data. RESULTS: There was a statistically significant difference in the proportion of tooth wear in total teeth area (P < 0.001) when comparing continental and coastal Croatia in LA and coastal Croatia between LA and EMA (P = 0.006 and P < 0.001, respectively). Samples from coastal Croatia from the LA period had the lowest percentage of tooth wear with a median of 8.35%, while samples from coastal Croatia from the EMA had the highest percentage of tooth wear with a median of 18.26%. Our results generally show greater tooth wear in the EMA period in male subjects. CONCLUSION: The results of the tooth wear research obtained with the Vista Metrix software can contribute to the study of life circumstances and changes that the analysed population has experienced in its historical development.

Y Chromosome Story-Ancient Genetic Data as a Supplementary Tool for the Analysis of Modern Croatian Genetic Pool.

Due to its turbulent demographic history, marked by extensive settlement and gene flow from diverse regions of Eurasia, Southeastern Europe (SEE) has consistently served as a genetic crossroads between East and West and a junction for the migrations that reshaped Europe's population. SEE, including modern Croatian territory, was a crucial passage from the Near East and even more distant regions and human populations in this region, as almost any other European population represents a remarkable genetic mixture. Modern humans have continuously occupied this region since the Upper Paleolithic era, and different (pre)historical events have left a distinctive genetic signature on the historical narrative of this region. Our views of its history have been mostly renewed in the last few decades by extraordinary data obtained from Y-chromosome studies. In recent times, the international research community, bringing together geneticists and archaeologists, has steadily released a growing number of ancient genomes from this region, shedding more light on its complex past population dynamics and shaping the genetic pool in Croatia and this part of Europe.

Bone fractures as indicators of intentional violence in the eastern Adriatic from the antique to the late medieval period (2nd-16th century AD).

To test the historically documented hypothesis of a general increase in deliberate violence in the eastern Adriatic from the antique (AN; 2nd-6th c.) through the early medieval (EM; 7th-11th c.) to the late-medieval period (LM; 12th-16th c.), an analysis of the frequency and patterning of bone trauma was conducted in three skeletal series from these time periods. A total of 1,125 adult skeletons-346 from the AN, 313 from the EM, and 466 from the LM series-were analyzed. To differentiate between intentional violence and accidental injuries, data for trauma frequencies were collected for the complete skeleton, individual long bones, and the craniofacial region as well as by type of injury (perimortem vs. antemortem). The results of our analyses show a significant temporal increase in total fracture frequencies when calculated by skeleton as well as of individuals exhibiting one skeletal indicator of deliberate violence (sharp force lesions, craniofacial injuries, "parry" fractures, or perimortem trauma). No significant temporal increases were, however, noted in the frequencies of craniofacial trauma, "parry" fractures, perimortem injuries, or of individuals exhibiting multiple skeletal indicators of intentional violence. Cumulatively, these data suggest that the temporal increase in total fracture frequencies recorded in the eastern Adriatic was caused by a combination of factors that included not only an increase of intentional violence but also a significant change in lifestyle that accompanied the transition from a relatively affluent AN urban lifestyle to a more primitive rural medieval way of life.

Four cases of ankylosing spondylitis in medieval skeletal series from Croatia.

Osteological changes consistent with ankylosing spondylitis were observed in three males and one female skeleton recovered from four medieval sites-Velim, Koprivno, Buje, and Rijeka-all situated on Croatia's eastern Adriatic coast and its immediate hinterland. The skeletons present changes in the spine, ribs, sacrum, and innominates that are typical of ankylosing spondylitis that is a progressive, inflammatory disease of connective tissue calcification. The disease most commonly affects the sacroiliac joints, the joints of the spine, and the costovertebral joints. In the final stages of the disease, the vertebral bodies remodel and together with the associated syndesmophytes form a continuous, smooth bone surface that is sometimes referred to as "bamboo spine." The prevalence of this disorder in the analyzed Croatian samples is 4/303 or 1.3% and thus corresponds with frequencies recorded in modern European populations. Differential diagnosis rules out the possibility of DISH, rheumatoid arthritis, and melorheostosis. These are the first cases of ankylosing spondylitis identified in Croatian archaeological series.

The repeatability of standard cranial measurements on dry bones and MSCT images.

This study examined if the cranial measurements from Data Collection Procedures for Forensic Skeletal Material 2.0 are repeatable when measured in dry bones and MSCT images and if the virtual measurements correspond to the physical ones. The sample included 33 dry crania imaged by MSCT. Two observers measured dry bones, two placed landmarks on 2D and 3D MSCT reconstructions, and one conducted measurements/landmarking on both media. One of the observers for each media repeated the measurements. Technical and relative technical error of measurement (TEM and rTEM) and percentage differences were calculated to examine the repeatability of measurements and compare measuring modalities. Intraobserver rTEM was above 1.5% for six bone measurements: FOB, ZOB, OBB, NLH, DKB, MDH (1.51%-4.87%) and for seven MSCT measurements: OBH, FOB, OBB, MDH, NLB, ZOB, DKB (1.57%-5.55%). The interobserver rTEM was above the acceptable level (>2%) for 11 measurements: PAC, NLH, OBB, EKB, MAL, FOB, NLB, OBH, ZOB, DKB, and MDH (2.01%-9.34%). The percentage differences were not systematically larger for measurements taken by the same user on both modalities than those obtained by different users on the same modality. When physical and MSCT measurements were tested on sex classification standards, the proportion of crania classified as male or female did not significantly differ (p > 0.05). The study showed that physical and virtual cranial measurements could be interchangeable for developing or applying sex estimation standards. However, clarifications and adaptations are necessary for measurements of mastoid, nasal, and orbital regions that did not meet the standard criteria.

Vertebral pathologies in two early modern period (16th-19th century) populations from Croatia.

In order to test to what degree Schmorl's nodes (SN), osteophytosis of the vertebral bodies (VO), and osteoarthritis of the articular facets (OA) are useful indicators of activity-related stress, an analysis of their frequencies and severity of expression was conducted in two early Modern period skeletal samples from Croatia--Koprivno and Sisak. Historic and contemporary ethnographic sources suggest that living conditions were more demanding in Koprivno, and that a sexual division of labor existed in both populations. A total of 2,552 vertebral bodies (990 from Koprivno and 1,562 from Sisak) and 5,186 articular facets (2,135 from Koprivno and 3,051 from Sisak) were analyzed. Koprivno exhibits significantly higher total frequencies of SN, VO, and OA than Sisak, and the total frequencies of SN and OA in both series are significantly higher in males. When, however, the series were analyzed by age and sex categories, the same trend was noted only in SN. The frequencies and severity of VO and OA could not be interpreted in keeping with the historic and contemporary ethnographic sources and were additionally, unlike SN, found to be strongly correlated with increased age. This study, therefore, suggests that while SN are useful indicators of different lifestyles and/or different activity patterns between various archaeological populations, VO and OA are-possibly because of their more varied etiologies-less useful markers of activity-related stress.

Sexual dimorphism in mastoid process volumes measured from 3D models of dry crania from mediaeval Croatia.

3D analysis of skeletal volumes has become an important field in digital anthropology studies. The volume of the mastoid process has been proposed to display significant sexual dimorphism, but it has a complex shape and to date no study has quantified the full mastoid volume for sex estimation purposes. In this study we compared three different ways to isolate the volume of the mastoid process from digital 3D models of dry crania, and then evaluated the performance of the three different volume definitions for sex estimation purposes. A total of 170 crania (86 male, 84 females) excavated from five medieval Croatian sites were CT-scanned and used to produce 3D stereolitographic models. The three different isolation techniques were based on various anatomical landmarks and planes, as well as the anatomy of the mastoid process itself. Measurements of the three different mastoid volumes yielded different accuracies and precisions. Interestingly, anatomical structures were sometimes more useful than classical landmarks as demarcators of mastoid volume. For all three volume definitions, male mastoid volumes were significantly larger than female volumes, in both relative and absolute numbers. Sex estimation based on mastoid volume showed a slightly higher precision and better accuracy (71% correct classifications) than visual scoring techniques (67%) and linear distance measurements (69%) of the mastoid process. Sex estimation based on cranial size performed even better (78%), and multifactorial analysis (cranium size + mastoid volume) reached up to 81% accuracy. These results show that measurements of the mastoid volume represent a promising metric to be used in multifactorial approaches for sex estimation of human remains.

The harsh life on the 15th century Croatia-Ottoman empire military border: analyzing and identifying the reasons for the massacre in Cepin.

Excavation of the historic period cemetery in Cepin, Croatia revealed the presence of a large number of perimortem injuries distributed among males, females, and subadults. Archaeological and historical data suggest these individuals were victims of a raid carried out by Turkish akinji light cavalry in 1441. Comparisons with the frequencies of perimortem trauma in 12 other, temporally congruent skeletal series from the Balkans (n = 2,123 skeletons) support this assumption. The role of the akinji in the Ottoman army was twofold: to supply war captives, and to terrorize and disperse local populations before the advance of regular troops. This article tests the hypothesis that the purpose of the 1441 raid was the latter. To accomplish this, perimortem trauma in the series were analyzed by sex, age, location, and depth of the injury. A total of 82 perimortem injuries were recorded in 12 males, 7 females, and 3 subadults. The demographic profile of the victims suggests that young adults were specifically targeted in the attack. Significant sex differences are noted in the number, distribution, and pattern of perimortem trauma. Females exhibit significantly more perimortem injuries per individual, and per bone affected, than males. The morphology and pattern of perimortem trauma in females is suggestive of gratuitous violence. Cumulatively, analysis of the osteological data suggest that the objective of the 1441 akinji raid was to spread terror and panic in the Cepin area, either as revenge for recent military setbacks, or as part of a long-term strategy intended to depopulate the area around Osijek.

Bone traumas in late antique populations from Croatia.

We present the results of the analyses of traumatic bone injuries in two Late Antique (3r to 5th century AD) skeletal samples from Croatia: Zadar--located on the eastern Adriatic coast, and a composite skeletal series from continental Croatia consisting of skeletons from Osijek, Vinkovci, Strbinci, and Zmajevac. The osteological series from continental Croatia are related to settlements located on, or near the Danubian military border, while Zadar--350 km to the west, is located deep in the territory of the Roman Empire. Numerous historical sources describe barbaric incursions, as well as large battles related to civil wars during the Late Antique period in continental Croatia. Conversely, there is no mention of similar events in the Zadar region. In accordance with these data our analysis tests the hypothesis that the inhabitants of continental Croatia were exposed to greater levels of violence than those living in Zadar. Analysis of bone traumas in the two series shows a similar, relatively high prevalence of long bone fractures in both samples, with a slightly higher frequency recorded in Zadar. Both series exhibit a high frequency of cranial injuries with, once again, higher frequencies recorded in the Zadar series. Additionally, two perimortem cranial fractures (one caused by a sword, the other by a blunt object) were observed in Zadar. Some of the recorded traumas in both samples resulted from accidents, but a number of injuries clearly resulted from intentional violence of lesser intensity. Further multidisciplinary research incorporating osteological, archaeological, and historical analyses is necessary to confirm the results obtained from these samples.

A case of hydrocephalus in a child from early modern period Zumberak, Croatia.

OBJECTIVE: To evaluate the etiology of a subadult skeleton exhibiting increased size of the neurocranium and upper face. MATERIALS: Skeletal remains of a child aged between 1.5-2 years from the Early Modern Period (14th -18th), Zumberak, Croatia. METHODS: Metric and volumetric data were collected, and CT with VRT reconstruction was employed. RESULTS: Metric analyses indicate that the neurocranium and upper face display increased size and volume. CONCLUSION: A diagnosis of the communicating form of hydrocephalus is suggested. SIGNIFICANCE: This is the first published case of the communicating form of hydrocephalus. LIMITATIONS: It is difficult to determine the specific etiology of this condition based on skeletal remains.

Osteological and dental markers of health in the transition from the Late Antique to the Early Medieval period in Croatia.

The purpose of this study is to analyze health at the transition from the Late Antique (LA) to the Early Medieval (EM) period in Croatia. Results of the analyses of skeletal remains are compared with historical and archaeological data to test the hypothesis that the transition was catastrophic. An additional objective is to determine whether the transition was a uniform process, or differentially affected the past inhabitants of Croatia because of various local considerations. To accomplish this, four markers of health: cribra orbitalia, linear enamel hypoplasia, nonspecific periostitis, and trauma were compared in 981 skeletons: 477 from nine urban LA sites, and 504 from six rural EM sites. Data were collected by sex and age for individual, and for co-occurrences of various features. Because continental and Adriatic Croatia has different ecological features, data were specifically tabulated for the two regions. Comparisons between the continental and Adriatic regions of the LA series showed no significant differences in the frequencies of the analyzed markers of stress. Comparisons between the LA and EM series showed similar frequencies in continental Croatia--suggesting no significant discontinuity of living conditions, and a significant increase of cribra orbitalia, periostitis, and trauma frequencies during the EM period in Adriatic Croatia. The deterioration of living conditions primarily affected subadults and males. These data suggest that the transition from the LA to the EM period in Croatia was not a uniform process, but differentially affected population biology most likely because of local cultural, socio-economical or political considerations.

Assessing childhood stress in early mediaeval Croatia by using multiple lines of inquiry.

ABSTRACT: Childhood stress, using both subadult and adult remains from early mediaeval (8th-11th c. CE) sites on the eastern Adriatic coast is analysed in this report. A total of 242 individuals (83 subadults, 69 adult females, and 90 adult males) were assessed for the presence of linear enamel hypoplasia, cribra orbitalia, sub-periosteal new bone formation, and scurvy. In addition, the dietary profile of nine subadults was assessed by the analysis of carbon and nitrogen stable isotopes from bulk collagen. Over three quarters of individuals with preserved permanent dentition (44/56 or 78.6%) exhibited evidence of linear enamel hypoplasia, while analysis of the onset of this condition shows that all defects formed between 1.2 and 5.6 years of age. Cribra orbitalia was identified in 60 out of 190 individuals with preserved frontal bones (31.6%). Sub-periosteal new bone formation was recorded in 42.6% of analysed subadults (29/68) with fourteen cases still active at the time of death. Additionally, scurvy was identified in three subadults. The isotopic study of carbon and nitrogen suggests that diet of the analysed subadults was based on terrestrial C3 resources, with a varying input from C4 and a low intake of marine resources. The presented study strongly indicates that a large majority of the analysed individuals suffered from poor health during their childhood as indicated by the high frequencies of linear enamel hypoplasia, cribra orbitalia and sub-periosteal new bone formation.

Dental calculus and isotopes provide direct evidence of fish and plant consumption in Mesolithic Mediterranean.

In this contribution we dismantle the perceived role of marine resources and plant foods in the subsistence economy of Holocene foragers of the Central Mediterranean using a combination of dental calculus and stable isotope analyses. The discovery of fish scales and flesh fragments, starch granules and other plant and animal micro-debris in the dental calculus of a Mesolithic forager dated to the end of the 8th millenium BC and buried in the Vlakno Cave on Dugi Otok Island in the Croatian Archipelago demonstrates that marine resources were regularly consumed by the individual together with a variety of plant foods. Since previous stable isotope data in the Eastern Adriatic and the Mediterranean region emphasises that terrestrial-based resources contributed mainly to Mesolithic diets in the Mediterranean Basin, our results provide an alternative view of the dietary habits of Mesolithic foragers in the Mediterranean region based on a combination of novel methodologies and data.

Prediction of stature based on radiographic measurements of cadaver long bones: a study of the Croatian population.

We tested a new approach to the stature prediction that could be used in the identification process of human skeletal remains of unknown identity. The stature of 19 female and 21 male adult cadavers was measured within 24 h after death and considered to be equal to the living stature. The antero-posterior radiographs of all limbs were taken, and the maximum length of the six long bones was measured from radiographs. There was a significant difference in the stature and maximum length of long bones between female and male cadavers (p<0.001 for all). The correlation between the stature and long bone length was the best for the humerus in females (r=0.792) and the tibia in males (r=0.891). Regression equations specific to the Croatian population were computed separately for each long bone in males and females and proven to be reliable in predicting the living stature of the individual.

Contribution of forensic anthropology to identification process in Croatia: examples of victims recovered in wells.

AIM: To describe the contribution of forensic anthropology to the recovery, analysis, and identification of victims from the 1991-1995 war in Croatia recovered in wells. METHODS: From 1996 to the present, human remains of a total of 61 individuals have been recovered from 13 wells. Six wells contained the remains of a single individual, one well contained the remains of 2 individuals, and 6 wells contained the remains 3 or more individuals. The majority of wells, containing 90.2% (55/61) of recovered individuals, were located within a 4 km radius of the Croatian-Serbian border. RESULTS: Forensic anthropologists re-individualized 26/61 (42.6%) individuals out of skeletonized and commingled remains, provided basic biological data on sex, age-at-death, and stature in all identifications (n=37), as well as established positive identification by recognizing unique skeletal features (antemortem fractures and skeletal evidence of antemortem surgical interventions) in 3/37 (8.1%) cases. Trauma analyses carried out by forensic anthropologists contributed to the determination of the cause of death in 38/61 (62.3%) individuals and to the probable cause of death in an additional 18/61 (29.5%) individuals. The most frequent (27/38, 71.0%) type of trauma causing death in individuals recovered from wells was a single gunshot wound. CONCLUSION: Forensic anthropologists, collaborating closely with forensic pathologists, forensic odontologists, forensic radiologists, criminologists, and molecular biologists contributed significantly to trauma analysis and identification of war victims recovered from wells.