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At least 649 records · Page 36Linked to original sources
PubMed1999

Relevance of sequential development of dermatoglyphics to schizophrenia.

Since the embryogeneses of epidermal ridges of hands and feet are reported to be identical, although those of the feet develop two or three weeks later, a tendency for symmetry or correspondence between each side finger and toe pairs could be envisaged. Any prenatal insult could disturb such developmental mechanisms, causing the lowering of either finger or toe ridge counts which might result in augmentation of differences between them. To test this hypothesis, the differences between each side thumb and big toe ridge counts of 89 schizophrenic patients and 65 control subjects were assessed. These samples were also subgrouped into those with and without identical pattern distributions on each side of their thumb and big toe pairs. Female schizophrenics who displayed identical patterns manifested significantly greater differences between their right thumb and big toe ridge counts in comparison to the control subjects (P = 0.0142). To elucidate the contributory digit for such a greater difference, the ridge counts of the right thumbs and big toes of the female patients were compared with the corresponding counts of the control subjects. The mean ridge count of the big toes was lesser in the patient group compared with that in the control subjects, a difference, however, that did not attain statistical significance.

Adult↗
PubMed1984

Central pockets in dermatoglyphic analysis: classification, frequency, twin and family data.

Central pockets were defined as small, loop-enclosed whorls whose quantitative values must not exceed the third part of the quantitative value of the loop or as small, whorl-like patterns in the core of a loop having at least one curved ridge with its convexity towards the opening of the loop. Applying this classification scheme, the frequency of central pockets was found to be 17.5% in 200 males and 17.0% in 200 females, but was significantly higher in a sample of 21 male and 22 female pairs of MZ twins (33.2% and 34.1%, respectively). Twin as well as family data (94 families with 269 children) pointed to a rather weak hereditary influence upon the formation of central pockets. Rudimentary central pockets occurred in 9.5% of males and 10.0% of females. Since no common genetic basis could be established for central pockets and rudimentary central pockets, the latter should not be scored as central pockets.

Dermatoglyphics↗
PubMed1977

Dermatoglyphics study of the Shompen of Great Nicobar.

The finger and palm prints of 20 male and 18 female Shompen of Great Nicobar were examined. The distribution of finger patterns and of palmar main line formulae showed significant sex differences. Main line index was higher on right than on left hands in both sexes. Axial triradius t was most frequently observed on both hands in the two sexes.

Asian People↗
PubMed1976

Genetic penetrance from MZ twins of absent C-triradius, a palmar dermatoglyphic trait.

Among 59 sets of MZ male twins and 48 sets of MZ female twins from Italy, 7 male sets (11.9%) and 7 female sets (14.6%) had absent c-triradius on one or more palms; among 214 individuals who had a MZ twin, 19(8.9%) had absent c-triradius in one or both palms. Due to small numbers these percentages are comparable to the occurrence of absent c-triradius found in 8.2% of 3946 Caucasians. When one member of a set of MZ twins showed the trait in one or both palms, 35.7% (5/14) of the other members also showed the trait in one or both palms. When an individual showed the trait in one palm, 26.3% (5/19) of the other palms also showed the trait. These two estimates of penetrance combined give an average value of 30.3% (10/33) which is comparable to an estimate of 30% found in a study of 478 family units in which transmission was compatible with an autosomal dominant gene.

Dermatoglyphics↗
PubMed2003

Dermatoglyphics in patients with eczema, psoriasis and alopecia areata.

BACKGROUND/AIMS: The study of patterns of fingerprints is important in anthropology and medical genetics, chiefly because of their diagnostic usefulness. In the present work, we studied the frequencies of various types of skin ridges of the first phalanx in patients with eczema, psoriasis and alopecia areata. METHODS: In a double-blind case-control study, we determined the frequencies of fingerprints in 551 patients (240 cases with eczema, 164 cases with psoriasis and 147 cases with alopecia areata) as well as in general population of Hamadan City (control group: 188 males and 529 females). We compared the frequencies between various fingers, hands and sexes in all three case groups as well as between case groups and control group. RESULTS: The frequencies of various types of fingerprints are presented in some tables. The results showed that frequencies are not statistically different according to types of fingers, hands (left or right) and sexes as well. But they are significantly different in various case groups and between case groups and control group. CONCLUSIONS: We can conclude that frequencies of various patterns of skin ridges differ in eczema, psoriasis and alopecia areata from normal population.

Alopecia Areata↗
PubMed1969

Dermatoglyphics.

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Chromosome Aberrations↗