Functional hand proportion is approximated by the Fibonacci series

• Autorzy: Choo K.W.-Q. , Quah W.-K. , Chang G.-H. , Chan J. Y.
• Języki publikacji: EN

Abstrakty

EN

The debatable relationship of functional human hand proportion with the Fibonacci series has remained an obscure scientific enigma short of clinical interest. The main difficulty of proving such a relationship lies in defining what should constitute true “functional” proportion. In this study, we re-evaluate this unique relationship using hand flexion creases as anatomical surrogates for the functional axes of joint rotation. Standardised desktop photocopies of palmar views of both hands in full digital extension and abduction were obtained from 100 healthy male volunteers of Chinese ethnicity. The functional axes were represented by the distal digital crease (distal interphalangeal joint, DIPJ), proximal digital crease (proximal interphalangeal joint, PIPJ), as well as the midpoint between the palmar digital and transverse palmar creases (metacarpophalangeal joint, MCPJ). The ratio of DIPJ-Fingertip:PIPJ-DIPJ:MCPJ-PIPJ (p3:p2:p1) was measured by two independent observers and represented as standard deviation about the mean, and then compared to the theoretical ratio of 1:1:2. Our results showed that, for the 2nd to 5th digits, the p2:p3 ratios were 0.97 ± 0.09, 1.10 ± 0.10, 1.04 ± 0.12, and 0.80 ± 0.08, respectively; whilst the p1:p2 ratios were 1.91 ± 0.17, 1.98 ± 0.14, 1.89 ± 0.16, and 2.09 ± 0.24, respectively. When the data were analysed for all digits, they showed a combined p3:p2:p1 ratio of 1:0.98:2.01. In conclusion, our results suggest that functional human hand proportion, as defined by flexion creases, is approximated by the Fibonacci series. (Folia Morphol 2012; 71, 3: 148–153)

• Wydawca: -
• Czasopismo: Folia Morphologica
• Rocznik: 2012
• Tom: 71
• Numer: 3
• Opis fizyczny: p.148=153,fig.,ref.

Twórcy

autor

Choo K.W.-Q.

• Yong Loo Lin School of Medicine, National University of Singapore, Singapore

autor

Quah W.-K.

• Department of Mathematics, Imperial College London, United Kingdom

autor

Chang G.-H.

• Department of Cardiac, Thoracic, and Vascular Surgery, National University Hospital, Singapore

autor

Chan J. Y.

• Resident, Internal Medicine, Ministry of Health Holdings, Singapore 099253, Singapore

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