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Genomics and social practices at Mogou and other Gansu sites during prehistoric trans-Eurasian exchange.

Beginning approximately 4,000 years ago, southwest-Asian-originating domesticated crops and livestock began appearing in Gansu, a key crossroads in northwestern China, yet the population dynamics and social practices underlying these historically transformative events in the region have not been fully explored. Despite the adoption of western domesticates, genome sequences of 149 individuals from the large Mogou cemetery and ten other sites in Gansu, dating between 4,700 and 3,000 years ago, revealed migrations within East Asian regions but no detectable evidence of genetic influence from western or central Eurasia, suggesting that early agricultural dispersals may have followed a model distinct from that documented in Europe and Central Asia. The Mogou cemetery represents a continuous community that interacted with surrounding regions but does not exhibit clear matrilocal or patrilocal residential patterns. We found no strong evidence that co-buried individuals represented biological relatives. Non-local ancestry appears to be linked to lower-status burial practices.

Humans

Forensic archaeology.

This presentation attempts to demonstrate the value of the use of improved methods in the excavation of buried bodies involved in a criminal investigation. Care in the removal of the skeleton and proper recording will document the interrelationship of all objects found in and around the grave and can, to a certain extent, recreate the event. Carelessness will result in evidence being irretrievably lost. The crime scene investigator's problem, arachaeologically, includes the nature of the remains, dating the time of burial, and techniques of excavation. Archaeological recovery techniques should be adopted in homicide investigation involving buried bodies.

Age Determination by Skeleton

Culture, Psychiatry and Epigenetics.

Regarding the methodology of ethnopsychiatric research, for example, on the Vietnamese Mo Mường's burial rituals or the health-promoting and healing effects of the Chinese Tujia dances, three different approaches can be distinguished: phenomenological-descriptive methods, hermeneutic-interpretive techniques and studies on underlying mechanisms such as hypnotherapeutic or neuroendocrine dynamics. Since epigenetics has shown that cultural and artistic experiences can influence gene expression and genetic functioning, even across generations, the article argues for greater consideration of epigenetics in medical anthropology and ethnopsychiatry. Epigenetic dynamics can significantly influence health promoting and healing effects of rituals in ethnic traditions and determine an individual's responsiveness to such practices. In this context, the interplay between genetics and epigenetics, various concepts of the collective unconscious, transcultural psychiatry, culturally sensitive arts therapies, and issues of migration and transcultural identities are discussed.

Humans

Trace elements in man.

It is likely that most, if not all, of the elements found to be essential in animals will be shown to be so for man, and the clinical picture produced by deficiency of the elements in the human patient will differ little from that seen in the animal, although this has been established for only five elements (I, Fe, Cu, Co and Zn). However, the link between lack of a given element in the soil and a human patient is far less direct and much more complex than that met with in the animal grazing on deficient pastures, except in isolated primitive communitis. Zn is the most protean of the trace elements and has been chosen to illustrate this in human practice. Excesses of essential elements (both trace and major) give rise to toxic effects and the importance of a proper balance especially of the transitional elements in the human diet is discussed with special reference to Cu, Zn and Fe. Certain non-essential trace elements are individual and community hazards: Cd, Pb and Hg are the principal offenders for humans. Mankind is now largely dependent on grassland products, cereals and livestock with increasing dominance of the former in human nutrition. This has reduced the bioavailability of trace elements so that study of trace metals, especially Zn and Cu, in skeletal and dental remains at human burial and occupation sites should prove useful in assessing the consequences of this striking change in dietary habits.

Biological Evolution