Extraordinary hand shapes!

**Martijn (admin)** Sat Jun 28, 2014 11:20 am

Here are two extraordinary cases which illustrate that assessing finger length with just the finger length to palm length ratio (FL/PL) can lead to fairly 'incorrect' assessments:

Case 1: excessive narrow hand width!

Extraordinary hand shapes! Marfan-5L

This extraordinary case 1 hand is recognized to represent a Marfan case example for 'arachnodactyly' (= abnormally long, slender fingers), see page 3:
http://webeye.ophth.uiowa.edu/eyeforum/cases/110-marfan.pdf

This case confronts us with fundamental problem, because it is interesting to see that finger length assessment in this case presents a contradiction regarding the methods that can be used to assess finger leng - through palm length and palm width:

- finger length to palm width is above the 97th percentile => indicative for extraordinary long fingers
- finger length to palm length is just below the 25th percentile => indicative for short fingers
- AVERAGE of finger length to palm width & palm length combined is above the 97th percentile => indicative for extraordinary long fingers

So, in case 1 we find in 2 out of 3 perspectives the assessment 'extraordinary long fingers', which is a clear indication that finger length in this example can 'safely' be described to be extraordinary long!

Case 2: excessive wide hand width!

Extraordinary hand shapes! Fragile-x-syndrome-2

Extraordinary hand shapes! Fragile-x-syndrome-2

This extraordinary case 2 hand represents a case of 'brachydactyly' (extraordinary short fingers) in Fragile-x syndrome:
http://www.handresearch.com/diagnostics/simian-line-fragile-x-syndrome-case-2.htm

Case 2 confronts us with the same problem:

- finger length to palm width is below the 3rd percentile => indicative for extraordinary short fingers
- finger length to palm length is just above normal => indicative for ordinary/slightly long fingers
- AVERAGE of finger length to palm with & palm length combined is below the 3rd percentile => indicative for extraordinary short fingers

So, in case 2 we find in 2 out of 3 perspectives the assessment 'extraordinary short fingers', which is a clear indication that finger length in this example can 'safely' be described to be extraordinary short!

Conclusion:

Both in case 1 and case 2 the FL/PL approach does not appear to work at all, because it's results can be described to present an incorrect delusive assessment result!!!

Fair point?

PS. Finally, I would like to add that I am not sure that it is possible to present likewise cases regarding the FL/PB perspective... but I will report them as soon as I find such cases!

**Martijn (admin)** Sat Jun 28, 2014 11:41 am

Another hand shape type that approaches to represent another type of an 'extraordinary hand shape' concerns the hypothetical hand shape example that presents ultimate balance - see the hand presented inside the picture above!

The details for this 'ultimately proportioned hand' (which concerns an example of excessive short hand length) are:

- perspective 1: FL/PB = slightly long (just above 50th percentile)
- perspective 2: FL/PL = extraordinary long (well above 97th percentile)
- combined perspective (average of FL/PB and FL/PL): = extraordinary long (well above 97th percentile)

However. the details show that it would not qualify like the first two examples did in the previous post... since there is no obvious 'inconsistency' in any of the finger length perspectives for this 'ultimately proportioned hand'; which sort of illustrates how extraordinary and rare the 2 cases presented inside the first post really are!

For more details regarding the percentiles see the articles:
- Dolichodactyly: extraordinary long fingers
- Understanding hand shape: evolution, genetics, sex, ethnicity & personality!

**Martijn (admin)** Tue Jul 15, 2014 7:07 pm

Here's a brand new set of proportional formulas to assess elemental hand shape (pre-announcement: proportional formulas for 'mixed' hand shapes will become available very soon!):

http://www.handresearch.com/diagnostics/finger-length-proportions-elemental-hand-shapes.htm#proportions

Earth hand shape:
• proportional formula (with PL=10): FL=7.25 x PB=8.75 x PL=10 [when PB is measured at center of palm then PB=9.25]
• essential feature: low PROPORTIONAL LENGTH = (very) short proportioned fingers + (very) short proportioned palm

Fire hand shape:
• proportional formula (with PL=10): FL=7.5 x PB=7.5 x PL=10 [when PB is measured at center of palm then PB=8]
• essential feature: low PROPORTIONAL BALANCE = short proportioned fingers + long proportioned palm

Air hand shape:
• proportional formula (with PL=10): FL=8.5 x PB=8.5 x PL=10 [when PB is measured at center of palm then PB=9]
• essential feature: high PROPORTIONAL BALANCE = long proportioned fingers + short proportioned palm

Water hand shape:
• proportional formula (with PL=10): FL=8.75 x PB=7.25 x PL=10 [when PB is measured at center of palm then PB=7.75]
• essential feature: high PROPORTIONAL LENGTH = (very) long proportioned fingers + (very) long proportioned palm

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