- Diseases & Syndromes (1/6) - HANDDIAGNOSTICS: DISEASES & SYNDROMES
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The previous part of this course reported that the many research programs on Down's syndrome have been most successfull.
But various research programs on other diseases and syndromes have resulted in other interesting insights as well. Down's syndrome & other trisomies
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The genetic material of 'trisomy syndromes' is characterized by an extra chromosome on one of the 23 pairs of chromosomes.
In Down's syndrome (trisomie 21) this extra chromosome is always observed on the 21th chromosome pair: see figure A-8 on the last page.
Other examples are: Edward's syndrome (trisomy 18), Patau's syndrome (trisomy 13),
and Warkany's syndrome (trisomy 8).
Stereotypes:
Normal
Trisomy 8
Trisomy 13
Trisomy 18
Trisomy 21
Discovered by:
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Warkany
Patau
Edward
Down
Simian crease
1-5 %
40 %
60 %
75 %
60 %
t"
6 %
65 %
95 %
50 %
65 %
A-line: wrist
5 %
Zelfzaam
70 %
25 %
Zeldzaam
Fingerprint dermatoglyphics:
Large variation
Many arches + whorls
Many arches
Very many arches
Many ulnare loops
- HANDANALYSIS & DISEASES (1/6) -
handanalysis - handreading - palm-reading - palmistry - chirology
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BACK
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Handanalysis MINI-COURSE:
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This paragraph will firstly focuss on the 'syndrome family' of which Down's syndrome is an aspect: the so-called ‘autosomal trisomies’.
The next step will be a presentation on other syndromes (with a genetic malformation), which are accompagnied with hand stereotypes.
And finally you will be informed about the present state of the developments in dermatoglyphic medical research.
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The hands of people with a trisomy syndrome show very frequently a simian crease (about 40%).
In Down's syndrome this percentage is usually a bit higher, and the highest percentage is observed in Edward's syndrome:
see table B-1.