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PubMed2003

Ancient teeth and modern human origins: an expanded comparison of African Plio-Pleistocene and recent world dental samples.

Previous research by the first author revealed that, relative to other modern peoples, sub-Saharan Africans exhibit the highest frequencies of ancestral (or plesiomorphic) dental traits and, thus, appear to be least derived dentally from an ancestral hominin state. This determination, in conjunction with various other lines of dental morphological evidence, was interpreted to be supportive of an African origin for modern humans. The present investigation expands upon this work by using: 1) direct observations of fossil hominin teeth, rather than data gleaned from published sources, 2) a single morphological scoring system (the Arizona State University Dental Anthropology System) with consistent trait breakpoints, and 3) data from larger and more varied modern human comparative samples. As before, a multivariate distance statistic, the mean measure of divergence, was used to assess diachronic phenetic affinities among the Plio-Pleistocene hominins and modern humans. The present study also employed principal components analysis on dental trait frequencies across samples. Both methods yielded similar results, which support the previous findings; that is, of all modern human samples, sub-Saharan Africans again exhibit the closest phenetic similarity to various African Plio-Pleistocene hominins-through their shared prevalence of morphologically complex crown and root traits. The fact that sub-Saharan Africans express these apparently plesiomorphic characters, along with additional information on their affinity to other modern populations, evident intra-population heterogeneity, and a world-wide dental cline emanating from the sub-continent, provides further evidence that is consistent with an African origin model.

Africa↗
PubMed2001

Growth processes in teeth distinguish modern humans from Homo erectus and earlier hominins.

A modern human-like sequence of dental development, as a proxy for the pace of life history, is regarded as one of the diagnostic hallmarks of our own genus Homo. Brain size, age at first reproduction, lifespan and other life-history traits correlate tightly with dental development. Here we report differences in enamel growth that show the earliest fossils attributed to Homo do not resemble modern humans in their development. We used daily incremental markings in enamel to calculate rates of enamel formation in 13 fossil hominins and identified differences in this key determinant of tooth formation time. Neither australopiths nor fossils currently attributed to early Homo shared the slow trajectory of enamel growth typical of modern humans; rather, both resembled modern and fossil African apes. We then reconstructed tooth formation times in australopiths, in the approximately 1.5-Myr-old Homo erectus skeleton from Nariokotome, Kenya, and in another Homo erectus specimen, Sangiran S7-37 from Java. These times were shorter than those in modern humans. It therefore seems likely that truly modern dental development emerged relatively late in human evolution.

Adult↗
PubMed1999

Morphological variation in great ape and modern human mandibles.

Adult mandibles of 317 modern humans and 91 great apes were selected that showed no pathology. Adult mandibles of Pan troglodytes troglodytes, Pongo pygmaeus pygmaeus and Gorilla gorilla gorilla and from 2 modern human populations (Zulu and Europeans from Spitalfields) were reliably sexed. Thirteen measurements were defined and included mandibular height, length and breadth in representative positions. Univariate statistical techniques and multivariate (principal component analysis and discriminant analysis) statistical techniques were used to investigate interspecific variability and sexual dimorphism in human and great ape mandibles, and intraspecific variability among the modern human mandibles. Analysis of interspecific differences revealed some pairs of variables with a tight linear relationship and others where Homo and the great apes pulled apart from one another due to shape differences. Homo and Pan are least sexually dimorphic in the mandible, Pan less so than Homo sapiens, but both the magnitude of sexual dimorphism and the distribution of sexually dimorphic measurements varied both among and between modern humans and great apes. Intraspecific variation among the 10 populations of modern humans was less than that generally reported in studies of crania (74.3% of mandibles were correctly classified into 1 of 10 populations using discriminant functions based on 13 variables as compared with 93% of crania from 17 populations based on 70 variables in one extensive study of crania). A subrecent European population (Poundbury) emerged as more different from a recent European population (Spitalfields) than other more diverse modern populations were from each other, suggesting considerable morphological plasticity in the mandible through time. This study forms a sound basis on which to explore mandibular variation in Neanderthals, early Homo sapiens and other more ancient fossil hominids.

Adult↗
PubMed2006

Serial coalescent simulations suggest a weak genealogical relationship between Etruscans and modern Tuscans.

The Etruscans, the only preclassical European population that has been genetically characterized so far, share only two haplotypes with their modern geographic counterparts, the Tuscans, who, nonetheless, appear to be their closest relatives. We modeled 10 demographic scenarios spanning the last 2,500 years and tested by serial coalescent simulation whether any are consistent with the patterns of genetic diversity observed within and between the Etruscan and the modern Tuscan populations. Models in which the Etruscans are the direct ancestors of modern Tuscans appear compatible with the observed data only when they also include a very high mutation rate and an ancient founder effect. A better fit was obtained when the ancient and the modern samples were extracted from two independently evolving populations, connected by little migration. Simulated and observed parameters were also similar for a scenario in which the ancient samples came from a subset, e.g., a social elite, genetically differentiated from the bulk of the Etruscan population. In principle, these results may be biased by factors such as gross and systematic errors in the ancient DNA sequences and failure to sample suitable modern individuals. If neither proves to be the case, this study strongly suggests that either the mitochondrial mutation rate is much higher than currently believed or the Etruscans left very few modern mitochondrial descendants.

Biological Evolution↗
PubMed2006

Early modern humans from the Pestera Muierii, Baia de Fier, Romania.

The early modern human remains from the Peştera Muierii, Romania have been directly dated to approximately 30,000 radiocarbon years before present (approximately 30 ka 14C BP) (approximately 35 ka cal BP) ("calendrical" age; based on CalPal 2005) and augment a small sample of securely dated, European, pre-28 ka 14C BP (approximately 32.5 ka cal BP) modern human remains. The Muierii fossils exhibit a suite of derived modern human features, including reduced maxillae with pronounced canine fossae, a narrow nasal aperture, small superciliary arches, an arched parietal curve, zygomatic arch above the auditory porous, laterally bulbous mastoid processes, narrow mandibular corpus, reduced anterior dentition, ventral-to-bisulcate scapular axillary border, and planoconcave tibial and fibular diaphyseal surfaces. However, these traits co-occur with contextually archaic and/or Neandertal features, including a moderately low frontal arc, a large occipital bun, a high coronoid process and asymmetrical mandibular notch, a more medial mandibular notch crest to condylar position, and a narrow scapular glenoid fossa. As with other European early modern humans, the mosaic of modern human and archaic/Neandertal features, relative to their potential Middle Paleolithic ancestral populations, indicates considerable Neandertal/modern human admixture. Moreover, the narrow scapular glenoid fossa suggests habitual movements at variance with the associated projectile technology. The reproductive and scapulohumeral functional inferences emphasize the subtle natures of behavioral contrasts between Neandertals and these early modern Europeans.

Anthropology↗
PubMed1999

The early Upper Paleolithic human skeleton from the Abrigo do Lagar Velho (Portugal) and modern human emergence in Iberia.

The discovery of an early Upper Paleolithic human burial at the Abrigo do Lagar Velho, Portugal, has provided evidence of early modern humans from southern Iberia. The remains, the largely complete skeleton of a approximately 4-year-old child buried with pierced shell and red ochre, is dated to ca. 24,500 years B.P. The cranium, mandible, dentition, and postcrania present a mosaic of European early modern human and Neandertal features. The temporal bone has an intermediate-sized juxtamastoid eminence. The mandibular mentum osseum and the dental size and proportions, supported by mandibular ramal features, radial tuberosity orientation, and diaphyseal curvature, as well as the pubic proportions align the skeleton with early modern humans. Body proportions, reflected in femorotibial lengths and diaphyseal robusticity plus tibial condylar displacement, as well as mandibular symphyseal retreat and thoracohumeral muscle insertions, align the skeleton with the Neandertals. This morphological mosaic indicates admixture between regional Neandertals and early modern humans dispersing into southern Iberia. It establishes the complexities of the Late Pleistocene emergence of modern humans and refutes strict replacement models of modern human origins.

Animals↗
PubMed1988

Modern technology in the rehabilitation process.

Modern technology gives a variety of new opportunities for severely disabled persons. It is time to start a serious discussion about how these new opportunities can be incorporated in rehabilitation theory and practice. In this article we show how modern technology may support independent life for the severely disabled. And we also discuss how modern technology can be used to change the environment. Removal and prevention of environmental barriers for participation is one main practical rehabilitation method. Modern technology therefore must also be evaluated by its environmental consequences. One important question is: How can modern technology open up more areas of normal participation for the disabled? The research approach is fieldwork, interviews with disabled persons, co-operation with organizations inventing and producing new products, as well as participation in social analysis and environmental change. Two conclusions to date are: (1) There is a wide gap between new technical possibilities and the real life situation of most people with severe disabilities; (2) Modern technology used as aids for people with severe disabilities has a rehabilitative effect only if it is supported by a sufficient social system for transport, security and care.

Activities of Daily Living↗
PubMed1998

Electromyographic analysis of grand-plié in ballet and modern dancers.

PURPOSE: The purpose of this report is to describe lower extremity muscle activity in grand-plié, as determined by EMG analysis; to compare and contrast muscle function in grand-plié and demi-plié to support the hypothesis that grand-plié is not simply a deeper demi-plié, but rather a fundamentally different movement in terms of muscle use; and to present further evidence in support of the hypothesis that ballet dancers use muscles differently than modern dancers in dance movement. METHODS: Surface electromyography was used to analyze lower extremity muscle activity during grand-plié in first position with lower extremities turned out in five ballet and seven modern female professional dancers. RESULTS: Electromyographic (EMG) activity of tibialis anterior included continuous activity from heel-off during the lowering phase, through midcycle, and ending at heel-on during the rising phase in all grand-pliés; the majority of tibialis anterior EMG tracings in ballet dancers had additional activity at the end of the rising phase. All EMG tracings for vastus lateralis and medialis included a peak of activity during the lowering phase, a decrease (valley) at midcycle, followed by another peak during the rising phase; increased activity at the end of the rising phase was observed in most grand-plié in ballet, and not modern, dancers. Adductor EMG activity was also observed in all tracings with a peak during the lowering phase from heel-off to midcycle, a valley at midcycle, followed by a peak of activity in early rising phase; the midcycle valley was of lower, and the rising phase peak of higher, activity in ballet compared with modern dancers. Variation of EMG patterns was observed for lateral and medial gastrocnemius, gluteus maximus, and hamstrings. CONCLUSIONS: The data support the concept that lower extremity muscle activity in dance movement is comprised of three major types: (a) unique, characteristic activity required for the execution of the movement; (b) varied activity which is characteristic of dancers of different dance idioms; and (c) varied activity which may depend on factors such as balance, personal habit, and individual training background. Furthermore, EMG activity of vastus lateralis and medialis at the midcycle valley in grand-plié was significantly less in ballet dancers than in modern dancers despite similar degree of knee flexion, suggesting that ballet dancers may have lower patellofemoral joint reaction force at midcycle than modern dancers.

Analysis of Variance↗
PubMed1999

Is analytical psychology a religion? Rationalist and romantic approaches to religion and modernity.

The relationship between analytical psychology and religion is part of the larger issue of the relationship between modernity and religion. There are three main views on the issue. The fundamentalist position sets religion against modernity and opts for religion over modernity. What I call the 'rationalist' position likewise sets religion against modernity but opts for modernity over religion. By contrast to both views, what I call the 'romantic' position reconciles religion with modernity. Rationalists maintain that religion can exist only in so far as it serves as an explanation of the physical world, which the rise of science now precludes. Romantics maintain that religion, while serving as an explanation of the physical world till dislodge by science, is at heart anything but an explanation. The toppling of the religions explanation by the scientific one, far from dooming religion, prods religion into making explicit what it has in fact been all along. By this categorization, Jung is overwhelmingly a romantic. For him, the function of religion has always been more psychological than explanatory, and the rise of science does not preclude the continuing existence of religious myths as a psychological rather than an explanatory phenomenon. For those for whom science does spell the demise of religion, secular myths can replace religious ones, and those secular myths are more secular versions of religions myths than secular alternatives to religions myths. Yet even if for Jung religion can still exist today because religion is in fact psychology, it does not follow that psychology is therefore a religion.

Christianity↗
PubMed2005

Modernizing UK health services: 'short-sharp-shock' reform, the NHS subsistence economy, and the spectre of health care famine.

Modernization is the trend for societies to grow functionally more complex, efficient and productive. Modernization usually occurs by increased specialization of function (e.g. division of labour, such as the proliferation of specialists in medicine), combined with increased organization in order to co-ordinate the numerous specialized functions (e.g. the increased size of hospitals and specialist teams, including the management of these large groups). There have been many attempts to modernize the National Health Service (NHS) over recent decades, but it seems that none have significantly enhanced either the efficiency or output of the health care system. The reason may be that reforms have been applied as a 'drip-drip' of central regulation, with the consequence that health care has become increasingly dominated by the political system. In contrast, a 'short-sharp-shock' of radical and rapid modernization seems to be a more successful strategy for reforming social systems - in-between waves of structural change the system is left to re-orientate towards its client group. An example was the Flexner-initiated reform of US medical education which resulted in the closure of nearly half the medical colleges, an immediate enhancement in quality and efficiency of the system and future growth based on best institutional practices. However, short-sharp-shock reforms would probably initiate an NHS 'health care famine' with acute shortages and a health care crisis, because the NHS constitutes a 'subsistence economy' without any significant surplus of health services. The UK health care system must grow to generate a surplus before it can adequately be modernized. Efficient and rapid growth in health services could most easily be generated by stimulating provision outside the NHS, using mainly staff trained abroad and needs-subsidized 'item-of-service'-type payment schemes. Once there is a surplus of critically vital health services (e.g. acute and emergency provision), then radical modernization should rapidly improve the health service by a cull of low-quality and inefficient health care providers.

Efficiency, Organizational↗
PubMed1992

Medical education and medical education research and development activities in modern China.

The development of medical education in China occurred quite differently to medical education in the rest of the world. A review of the literature has been presented regarding the historical development and the evolution of medical education research and development (MERAD) units in modern China. The history of medical education in modern China has been divided into three periods: (1) the 17 years before the 'Cultural Revolution' (1949-1966); (2) the period of the 'Cultural Revolution' (1966-1976); (3) the post 'Cultural Revolution' period (1976 onwards). Although a number of MERAD activities had existed on China's medical campuses since 1949, there was no formal organizational structure for MERAD before 1978. The change of the political situation in 1978 led China to seek modernization, with education as its basis. In the process of health care system modernization, medical education was given priority, and the Western model of establishing MERAD units as a means of improving the training of health professionals was introduced. The evolution of medical education research and development in modern China appears to be following the Western pattern due to the multitude of Western consultants and fellowships in Western countries provided to Chinese medical education leaders. A group of people from medicine is gathering in the MERAD field and MERAD units are beginning to take shape in modern China.

China↗
PubMed1994

Health politics meets post-modernism: its meaning and implications for community health organizing.

In this article, post-modern theory is described and applied to health politics with examples from community health organizing, social movements, and health promotion. Post-modernism questions conventional assumptions about concepts such as representation, participation, empowerment, community, identity, causality, accountability, responsibility, authority, and roles in community health promotion (those of expert, leader, and organizer). I compare post-modern social movements with their modern counterparts: the organizational forms, leadership styles, and substantive intellectual orientations of the two differ. I explain the social planning, community development, and social action models of community health organizing, comparing them with the priorities of post-modern social movements, and show the similarities and differences between them as to structural preferences, process, and strategies. Finally, and most importantly, I present the implicit lessons that post-modernism offers to health politics and outline the strengths and weaknesses of this approach to health politics.

Community Health Services↗
PubMed2005

Heterosexuals' attitudes toward hate crimes and hate speech against gays and lesbians: old-fashioned and modern heterosexism.

Modern racism and sexism have been studied to examine the different ways that prejudice can be expressed; yet, little attention has been given to modern heterosexism. This study examined the extent to which modern heterosexism and old-fashioned heterosexism predict acceptance of hate crimes against gays and lesbians and perceptions of hate speech. Male (n = 74) and female (n = 95) heterosexual college students completed a survey consisting of scales that assessed modern and old-fashioned heterosexism, acceptance of violence against gays and lesbians, attitudes toward the harm of hate speech and its offensiveness, and the importance of freedom of speech. Results indicated strong negative relations between both modern and old-fashioned heterosexism and the perceived harm of hate speech. When old-fashioned heterosexism,modern heterosexism, and the importance of freedom of speech were combined to predict hate crime and hate speech attitudes, only old-fashioned heterosexism predicted acceptance of hate crimes. All three predictors contributed to the perception of the harm of hate speech. Gender differences in the role of the importance of freedom of speech in predicting attitudes toward hate crimes and hate speech are noted.

Adult↗
PubMed2004

Modernization and the male-female suicide ratio in India 1967-1997: divergence or convergence?

The traditional view that modernization is likely to increase male vulnerability to suicide while protecting females from such self-destruction was offered by Durkheim (1951). This implies a theory of divergence of suicide rates such that the male-female suicide ratio should increase with modernization. Contemporary researchers have questioned whether modernization has had such an impact. We conducted a time series analysis of male and female suicide data to determine the impact on the suicide ratio for India for the years 1967 to 1997. We developed a modernization index comprised of urbanization, female literacy, and female work participation rates. Moreover, to improve methodological efficacy, we controlled for the passage of time. However, we found that there is no significant relationship between modernization and the male-female suicide ratio. Our conclusion is that using national male-female suicide ratios to determine modernization effects may mask significant regional gender and age differences, particularly in developing countries such as India.

Adult↗
PubMed2005

Comparison assessment of water use and damage between modern and traditional rice irrigation schemes: case of Usangu basin, Tanzania.

Water management and competition between users in water scarce river basins is a major challenge facing the human race. The inter dependence of users in such basins, necessitates a clear understanding of each user in relation to the location, the water demand, and the duration of water need. The understanding of these factors, together, is very important for the management of water resources in such basins without which, it is argued that, water is overused and wasted. As an example of this, the large modern and improved rice irrigation systems in Tanzania are believed to use water more efficient than the traditional irrigation systems. Yet, well-founded scientific analyses are a necessary part to quantify such beliefs as they can inform us whether the natural resource, in such systems, is properly utilized and managed or not. Likewise, such studies can allow us to quantify how much water is over used and thus the natural resource is unnecessarily degraded. This paper explores a study conducted in the Usangu basin, Tanzania, to investigate the gross and net needs for modern and traditional rice irrigation schemes, and the implications with regards to water resource management and damage. Problems relating to modernization of traditional smallholder irrigation systems and upstream--downstream water users are further discussed. The paper concludes from the study that modern irrigation schemes are inefficient compared to traditional irrigation schemes. Also modernization of traditional schemes in the study area have resulted into over abstraction and reduced productivity of water. Looking to the future, this study tells us that improvement or modernization of irrigation infrastructure should be balanced between negative impacts to available water resources albeit it's significant economic contribution to the community.

Agriculture↗
PubMed1976

[Problems associated with the prevention of cruelty to animals in modern livestock breeding (author's transl)].

Regulations for the protection of useful animals can be traced to the early history of Law. The reason for such regulations has hardly changed up to the present: the expedient incorporation of the animal into the hierachy of values of the prevailing times. Decisive impulses invariably originated from the legal conception, the need for legal protection as well as from the scientific conceptions of society. The development rarely took a linear course and was not without setbacks. The prevention of cruelty to animals has always been faced with particular conflicting situations. Our pluralistic society with its marked philosophy of profit-making has to face such a problem, in particular as a result of livestock keeping in modern systems. The necessity and legitimacy of a permanent supply of large quantities of high-grade animal foodstuffs to be offered to our present industrial society on a competitive and low-cost basis, have contributed to this development. The public and parliament have for some time been demanding a modern federal act for the prevention of cruelty to animals based on a technical conception allowing also those questions of animal protection related to the present keeping of useful animals to be integrated, thus achieving a gradual balancing of interests. Such an Animal Protection Act came into force on October 1, 1972. On account of its scientific orientation it prompts us to give renewed thought to many present-day ideas about the keeping of animals, especially of useful animals, employing modern systems. With this objective in mind the Act has already strongly influenced the developing international harmonization of provisions for Animal Protection. The problems linked with "Animal Protection/Keeping of Useful Animals" require a harmonization of the ethical, scientific, economic and legal aspects as an indispensable prerequisite. On the basis of expert opinions prepared by a group of specialists of the Federal Ministry of Agriculture on the minimum requirements to be satisfied by modern systems of fowl breeding, the various scientific basic concepts and evaluations are presented. The value of the information yielded by modern research into animal behaviour is emphasized in this connection. Future legal ordinances in accordance with Clause 13, para 1 of the Animal Protection Act of July 24, 1972 for the protection of useful animals kept in modern systems call for a particularly thorough scientific foundation which must also stand up to examination by the courts. The problems to be solved require comprehensive research. An urgent task for the near future will be to give the resolution of these problems a firm scientific base. In addition to the topical approach to the subject "Animal Protection/Keeping of Useful Animals", indications are given for a comprehensive approach which will prove indispensable in the future...

Animal Husbandry↗
PubMed2001

Morphometric testing of structural hypotheses of the supraorbital region in modern humans.

Our understanding of the functional morphology of the primate supraorbital region is based largely on previous morphometric and in vivo mechanical tests of hypotheses in non-human anthropoids. Prior tests of two structural hypotheses explaining morphological variation in the supraorbital region, the craniofacial size hypothesis and the spatial hypothesis, did not fully consider modern humans. We extend these previous findings to include modern humans by conducting morphometric tests of these two hypotheses in a sample of adult Melanesian crania. Morphometric correlates of structural predictions for the craniofacial size and spatial hypotheses were developed and compared to measurements of the supraorbital region via bivariate product-moment correlations. Measurements of the supraorbital region are significantly correlated with a craniofacial size estimate across individuals from this Melanesian sample. This result supports the prediction of the craniofacial size hypothesis that the magnitude of the supraorbital region is proportional to craniofacial size. The predicted link between the degree of neural-orbital disjunction and the magnitude of the supraorbital region, explicated in the spatial hypothesis, receives mixed support in the correlation analysis. These two results agree with previous research indicating that support for the craniofacial size and spatial hypotheses can be found across and within anthropoid primate species, including modern humans. Correlational support for both the craniofacial size and spatial hypotheses suggests multiple factors influence variation in the modern human supraorbital region. Thus, a single hypothesis cannot fully account for modern human variation in this region. The low bivariate correlation coefficients in this study further question whether existing hypotheses can adequately explain morphological variation in the supraorbital region in a primate population sample. Novel functional, structural, behavioral and developmental ideas must be explored if we are to better understand morphological variation in the modern human supraorbital region.

Anthropology, Physical↗
PubMed1975

Health services system in Hong Kong: professional stratification in a modernizing society.

A characteristic of modernizing societies is the coexistence of modern and traditional professions that claim to perform the same functions for the society. As a result of differential support by the dominant classes and their social values, and by the academic and the political authorities, the modern profession occupies a higher stratificational ranking than the traditional profession. In order to struggle for survival and to compete for more social-political and economic resources, the traditional profession advocates a rational revival, i.e. a rationalization of its social organization and technical contentmin this paper, I have illustrated these generalized statements by analyzing and comparing the profession of modern medicine with that of Chinese medicine in the modernizing society of Hong Kong, These two types of professional services are coexisting in the pluralistic health context of Hong Kong, but the former enjoys greater power, higher prestige and more economic resources. The state of modern medical dominance may be due to its connection with the dominant social value of science and to its support by the "higher" classes and the university and the government in Hong Kong. In recent years; however, there has emerged a revivalistic movement in the realm of Chinese medical care. In significant part, this may be influenced by developments in the People's Republic of China.

Acupuncture Therapy↗