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Video: introduction to Down syndrome
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ABOUT THE USE OF THE FAMOUS 'SINGLE PALMAR CREASE' AS A NOTORIOUS MARKER IN HAND DIAGNOSTICS
[A larger picture is available at the bottom of this page!]
The hands above are from a male person who has Down syndrome. An analysis reveals that this person has 8 out of the 10 most significant hand characteristics for Down syndrome (see characteristics: 1, 8, 13, 14, 15, 18, 19 & 24). A complete analysis reveals that this person has 13 of the 27 typical hand characteristics [hand lines: 1/2 + 1/2 characteristics; hand dermatoglyphics: 10 characteristics; hand shape: 2 characteristics; NOTICE: two characteristics are unknown for this case]. The details are presented below. A - HAND LINES IN DOWN SYNDROME (1-4): • 1 - 1/2 Simian crease - in both hands! [right hand only] • 2 - 1/2 Sydney line - in both hands! [left hand: 'incomplete' Sydney line] • 3 - NO Distal transverse crease: extended • 4 - NO 5Th finger: single crease B - HAND DERMATOGLYPHICS IN DOWN SYNDROME (5-20): • 5 - YES Fingerprints: 10 ulnar loops • 6 - NO Fingerprints: radial loops on ring finger • 7 - NO Fingerprints: radial loops on the pinky finger • 8 - YES Palmar ridge line A: ends between pinky & heart line, both hands • 9 - YES Palmar ridge line B: ends between pinky & ring finger, both hands • 10 - YES Palmar ridge line C: ends betw. ring- & middle finger, both hands • 11 - NO Palmar triradius C (left hand): missing or 'abortive' • 12 - NO Palmar ridge line D: radial exit • 13 - YES Alignment of ridges over the distal palmar area: 'transverse' • 14 - YES Palmar axial triradius: atd angle 57o or larger - [both hands] • 15 - YES Palmar axial triradius: distally displaced (t") - [both hands] • 16 - NO Hypothenar: 3 or more triradii • 17 - NO Hypothenar: whorl • 18 - YES Hypothenar: large ulnar loops - [both hands] • 19 - YES Palmar ridge dissociation - [thenar, center palm] • 20 - YES Thenar: no pattern - in both hands! C - HAND MORPHOLOGY IN DOWN SYNDROME (21-27): • 21 - NO Thumb: short, low set position - [both hands only a bit short] • 22 - YES Pinky finger: abnormally short - [both hands: < 50 % of palm length] • 23 - NO Pinky finger: clinodactyly • 24 - YES Fingers: brachydactyly - [right hand: = 40.0 % of hand length] • 25 - ? Fingers: hyperextensible finger joints - [unknown] • 26 - NO Palm: short, small, but relatively broad • 27 - ? Fingernails: brachyonychia - [unknown]. |