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CC BY-NC-ND 4.0 · Journal of Health and Allied Sciences NU 2012; 02(04): 80-87
DOI: 10.1055/s-0040-1703621
Review Article

THE POLLEX – INDEX COMPLEX AND THE KINETICS OF OPPOSITION

Arunachalam Kumar
1   Professor of Anatomy, K. S. Hegde Medical Academy, Nitte University Mangalore - 575 018, India.
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Abstract

The term opposition is exclusive to human manual articulation. The origin and development of the opposable thumb was a milestone in evolutionary history of man. The transition from pongid, pithecoid to paranathropus and thereon to anthropoid apes was witness to the transformation of the apposable thumb to an opposable one. While a few marsupials, primates and prosimians can and do 'oppose' their digits (either of the forelimb or hind-limb) these articulations are non-classical and cannot be categorized as opposition. The shortness of the thumb in proportion to the size and length of the palm / foot handicaps performance of functionally efficient 'opposition' in most species (1).

According to evolutionary biologists, one of the more singular factors elevating man as a higher mammal, as compared to any other, is the modification in the functional capability of the thumb. The human thumb stands alone in its talent to 'oppose'. Anatomically, 'opposition' implies the movement by which you can touch the tip of your thumb to the tips of other fingers of the same hand. No animal except the human kind has a truly opposable thumb(2)

The biomechanics of opposition of the pollex with special reference to its preferred digit, the index is discussed in this paper, in the light of increasing stress and usage of these digits in modern man exposed to newer personal communication devices and technologies which demand dexterity and speed in manipulation of these specific joints for specialized functions

Keywords

pollex - opposition - retroposition - apposition - human evolution - physical anthropology


Publication History

Article published online:
29 April 2020

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  • References

  • 1 Moyà-Solà, Salvador; Köhler, Meike; Rook, Lorenzo (1999). Evidence of hominid-like precision grip capability in the hand of the Miocene ape Oreopithecus. PNAS 96(1):313–317.
  • 2 Lewis, O J (1977). Joint remodeling and the evolution of the human hand. J Anat. 123(Pt 1):157–201.
  • 3 Napier, John Russell (1956). The prehensile movements of the human hand. J Bone Joint Surg Br 38(4):902–913. PMID 13376678.
  • 4 Imaeda, T; An, K N; Cooney, W P; Linscheid, R (1993). Anatomy of trapeziometacarpal ligaments. The Journal of hand surgery 18(2):226–31.
  • 5 Brunelli, Giovanni R. (1999). Stability of the first carpometacarpal joint. In Brüser, Peter; Gilbert, Alain. Finger bone and joint injuries. Taylor & Francis. pp. 167–170. ISBN 1-85317-690-7.
  • 6 Arunachalam Kumar (2002), The Index digit rotation and opposition in evolution, Human Races Monthly, Vol. 1, No.9
  • 7 Arunachalam Kumar (2011), An overview on evolution of human erect posture, bipedal mobility and gait, RGUHS Journal of Medical Sciences 1: 3:35-41, 2011
  • 8 Harcourt-Smith, W E H; Aiello, L C (2004). Fossils, feet and the evolution of human bipedal locomotion. Journal of anatomy (J Anat) 204(5):403–16.
  • 9 Norkin, C.C., & Levangie, P.K. (1992). Joint structure and function (2nd ed.) Philadelphia: F.A. Davis. http://moon.ouhsc.edu/dthompso/namics/firstcmc.htm#sources
  • 10 Arunachalam Kumar (2012), Fibonacci sequence in flexion-extension complex of index digit, Nitte University Journal of Health Science, Vol.2, No.1 P 31
  • 11 Arunachalam Kumar (2012), The range of pollex-index approximations in opposition, Nitte University Journal of Health Science, Vol.2, No.1 p 32
  • 12 Arunachalam Kumar (1985), Complementary rotation of index in thumb-index opposition, Proceedings of the International Conference of Biomechanics & Clinical Kinesiology of Hand & Foot, Eds. Patil K M & Srinivasan H, IIT, Madras
  • 13 Rao A & Arunachalam Kumar (1998), Mathematical analysis of flexionextension of index digit, Proceedings of the National Conference on Biomedical Engineering, Ed. U.C. Niranjan, VIII-21
  • 14 Arunachalam Kumar (1983), Adductor Pollicis test for ulnar nerve lesions, Plastic & Reconstructive Surgery, Vol. 78, No. 3, 420
  • 15 Hertling D, & Kessler, R.M. (1996), Management of common musculoskeletal disorders: Physical therapy principles and methods (3rd ed). Philadelphia: J.B.Lippincott.
  • 16 http://moon.ouhsc.edu/dthompso/namics/firstcmc.htm#sources
  • 17 Bade H, Koebke J, Bilger H (1993), Functional anatomy of the fifth carpometacarpal joint, Handchir Mikrochir Plas Chir, 25(3):116-120