Search PubMed⌕ Search

Biomedical subjects

M N Rashad

Publications and source records attributed to M N Rashad.

14 recordsLinked to original sources
PubMed1978

Parent-offspring resemblance for specific cognitive abilities in Korea.

Regressions of offspring on midparent value for tests of specific cognitive abilities in Korea were considerably higher than those for Americans of Japanese ancestry or Americans of European ancestry tested in Hawaii. This greater parent-offspring resemblance in Korea may be due to the particular method of test administration or to an increased genetic variance resulting from assortative mating. The pattern of parent-child correlations for three relatively pure tests of spatial ability and for the spatial factor did not conform to that of a sex-linked recessive character.

Adolescent↗
PubMed1978

Dermatoglyphic studies of myocardial infarction patients.

Dermatoglyphic traits were studied in a sample of 834 subjects selected from a cohort of some 8,000 living Japanese men, under a long-term study of heart disease in Hawaii. All of them were born between 1900 and 1919. Among them, 100 subjects had had positive diagnosis of myocardial infarction (MI). The present study included comparisons between the MI patients and the remaining group of all digital dermal pattern types and ridge counts by digit, by hand, and by individual. The MI patients had significantly higher frequency of true whorls, double loops and less ulnar loops and tented arches. Total and absolute ridge counts were significantly higher (less than 0.05) in all digits in favor of the MI patients. Similar trends were observed in analyses by digit and by hand. These observations suggest an antenatal origin of certain types of coronary disease.

Dermatoglyphics↗
PubMed1977

Genetics of asymmetry in dermatologlyphic traits.

Differences between the right and left hand in ridge counts and pattern type counts were analyzed using data obtained from 711 families consisting of all parents and 2,466 children. Heritability estimates for each trait were derived from regressions of offspring on either parent or average value of the two parents, and from full-sib correlations. These estimates varied from 0.09 for bimanual difference in the number of arches to 0.24 in the number of ulnar triradii. The low expected value of heritability for bimanual difference in dermatoglyphic traits was demonstrated.

Adult↗
PubMed1977

Association between renal function tests and pentachlorophenol exposure.

Data are presented and renal function tests and Pcp measurements on consecutive blood and urine samples collected from 18 workers at a wood treatment plant before, during, and after a 20-day vacation. Pcp concentrations in blood averaging 5.1 ppm before vacation fell to 2.2 ppm during vacation but with a temporary rise early in this nonexposure period, suggesting a body tissues store of Pcp which was mobilized in response to a negative Pcp balance. Urine Pcp concentrations showed similar but less marked variations. Creatinine clearance and phosphorus reabsorption values were depressed before vacation but showed significant improvement during vacation, suggesting that Pcp exposure reduced both glomerular filtration rate and tubular function, with recovery following a nonexposure period.

Chlorophenols↗
PubMed1975

Dermatoglyphic traits in patients with cardiovascular disorders.

Dermatoglyphic studies were carried out on 800 Japanese subjects. Digital dermal pattern types were classified into true whorls, double loops, ulnar loops, radial loops and arches. Both total and absolute ridge count were recorded. Subjects with hypertension, angina pectoris and myocardial infarction were compared with the remaining group of others who had not yet developed any of these disorders. Individuals with myocardial infarction had a significantly higher frequency of true whorls and a correspondingly lower frequency of ulnar loops than the control group. Total and absolute ridge counts were also significantly higher in myocardial infarction. Individuals with hypertension and angina pectoris were not significantly different in most dermatoglyphic traits from the controls. These observations suggest that antenatal factors may contribute to the etiology of myocardial infarction in man.

Angina Pectoris↗
PubMed1975

Genetic parameters of dermal patterns of ridge counts.

Dermatoglyphic traits including ridge counts and pattern type counts on fingers were studied in 711 families representing six racial groups in Hawaii. Heritability tesimates were derived from regressions of offspring on father, mother and mid-parent values as well as from full-sib correlations. These estimates varied from 0.23 for radial loops to 0.80 for total ridge count. The heritability estimates were lower for ridge counts of single hands or single digits.

Dermatoglyphics↗
PubMed1975

Cognitive abilities: use of family data as a control to assess sex and age differences in two ethnic groups.

Four cognitive factors were extracted from test data obtained on 997 families (3,268 individuals) in Hawaii. Factor loading profiles for the two largest ethnic groups (Caucasians and Japanese) are nearly identical, as are profiles for three different age groups. Age curves are presented for factor scores and for four specific cognitive tests. The younger respondents on the age curves are biological offspring of older respondents represented on the same curves, facilitating an unusual control for between-family variance. When the data were stratified by ethnicity, differential rates of cognitive development were indicated.

Adolescent↗