Population cycles in small mammals have attracted the attention of several generations of theoretical and experimental biologists and continue to generate controversy. Top-down and bottom-up trophic regulations are two recent competing hypotheses. The principal purpose of this paper is to explore the relative contributions of a variety of ecological factors to predator-prey population cycles. H...

The possibility that infants' and young children's immature behaviors and cognitions are sometimes adaptive is explored and interpreted in terms of evolutionary theory. It is argued that developmental immaturity had an adaptive role in evolution and continues to have an adaptive role in human development. The role of developmental retardation in human evolution is discussed, followed by an exam...

Socio-economic inequalities in adult and child health in Australia have been an issue of national concern. While a large body of data has discussed adult health, there have been relatively few Australian reports of socio-economic inequalities in child health. This occurs in a context where there have been increases in the proportion of Australian children living in poverty and where there has b...

Translocations between Cand D-group chromosomes are relatively uncommon. Only 4 cases of such a translocation have been reported up to now. In 2 of these, autoradiographic studies (Pitt et al., 1967; Bloom and Gerald, 1967) identified the missing D-group chromosome as a No. 14 and a No. 13, respectively. The present paper presents a case of C/15 translocation in a child with psychomotor retarda...

Chromosome results obtained from 1012 patients referred with developmental delay without known cause within the three years 1985 to 1987 are reported. G banding analysis and assessment of 70 cells for fragile X gave abnormal results in 84 cases: fragile X in 31 patients and other abnormalities in 53 patients. A further 16 sibs expressing the fragile X were detected in family studies originating...

A large proportion of preschool children in India, as in other developing countries, live in the urban slums. Among them, early identification of developmental delay will be beneficial. In the developed countries, rapid prescreening Denver Questionnaire (R-PDQ) is currently being used for community screening of developmental delay. This is followed by administering the Denver Development Screen...

Children with dysfunctional visual perception often exhibit limited participation in school activities, poor academic performance, and lack of independence in daily life activities. Negative experiences and poor school performance may then further delay social and emotional development. Thus, effective therapies for enhancing visual perceptual function are essential for facilitating integration...

familial adenomatous polyposis (fap) is a hereditary autosomal dominant cancer syndrome, results from germ line mutation or deletion of the adenomatous polyposis coli (apc) gene on chromosome 5q21. patients with fap suffer from multiple polyps mainly at the colorectal region as well as other parts of the gastrointestinal tract, which has propensity to transform into carcinoma. fap has also been...

objectives: monitoring development in infancy results in early detection of developmental delay, and early intervention can prevent sever complications of developmental disorders. the purpose of this study was to determine quality of developmental screening of 3-12 months infants referred to tehran health centers, through comparing with screening by bayley infant neurodevelopmental screener ii ...

     Familial adenomatous polyposis (FAP) is a hereditary autosomal dominant cancer syndrome, results from germ line mutation or deletion of the Adenomatous Polyposis Coli (APC) gene on chromosome 5q21. Patients with FAP suffer from multiple polyps mainly at the colorectal region as well as other parts of the gastrointestinal tract, which has propensity to transform into carcinoma. FAP has also...