triradius


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tri·ra·di·us

(trī-rā'dē-ŭs),
In dermatoglyphics, the figure at the base of each finger in the palm, produced by rows of papillae running in three directions so as to form a triangle.
Synonym(s): Galton delta (2)
Farlex Partner Medical Dictionary © Farlex 2012

triradius

Dermatoglyphics A pattern of whorls seen on the palms of children with trisomy 13 and 21, a finding of itself without pathologic significance, which supports the diagnosis of these trisomies.
McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.

triradius

(trī-rā′dē-ŭs)
In classifying fingerprints, the point of convergence of dermal ridges coming from three directions.
Medical Dictionary, © 2009 Farlex and Partners

Galton,

Sir Francis, English explorer and anthropologist, 1822-1911.
Galton delta - a more or less well-marked triangle in a fingerprint; in dermatoglyphics, the figure at the base of each finger in the palm.Synonym(s): triradius
Galton law of regression - average parents tend to produce average offspring, but children of extreme parents inherit parental peculiarities to a lesser degree than they appear in the parentsSynonym(s): law of regression of mean
Galton system of classification of fingerprints - a system of classification based on the variations in the patterns of the ridges, which are grouped into arches, loops, and whorls.
Galton whistle - a cylindrical whistle attached to a compressible bulb used to test hearing.
Medical Eponyms © Farlex 2012
References in periodicals archive ?
After the palm and finger prints were obtained, they were analysed for the position of the axial triradius t and ATD angle.
The commonest position in treatment non-responders and responders was the t-position of the axial triradius. The t' position of the triradius was seen more in both right and left hands of male non-responders as shown in Table 1.
So in our study, the commonest position in treatment responders and non-responders was the t position of the axial triradius. The t' position of the triradius was seen more in both hands of male non-responders.
Axial triradius t' was more common in right hand of the females in responder group.
* b-c rc L--number of ridges between triradii b and triradius c of the left hand.
* c-d rc R--number of ridges between the triradius c and the triradius d of the right hand.
* c-d rc L--number of ridges between triradii c and triradius d of the left hand.
The difference in the number of epidermal ridges between triradius A and triradius B of the right hand did not have statistical significance (p= 0.277; p > 0.05).
The number of ridges between triradius B and triradius C of the right hand in the examined group was 29.64 [+ or -] 6.19, while in the control group was 27.59 [+ or -] 7.46.
The number of ridge between triradius B and triradius C of the left hand in the examined group was 28.97 [+ or -] 6.32, while in the control group was 27.04 [+ or -] 6.57.
'atd' angle: It was recorded by drawing lines from the digital triradius 'a' to the axial triradius 't' and from this to digital triradius 'd.' The maximal 'atd' angle is an important parameter for this study (Fig.