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CC BY-NC-ND 4.0 · Indian J Plast Surg 2024; 57(04): 324-328
DOI: 10.1055/s-0044-1788932
Original Article

Prevalence of the Absence of the Palmaris Longus and Functional Flexor Digitorum Superficialis of the Little Finger in the Indian Population

Subashini Rajendiran 
1   Department of Hand Surgery, Sri Ramachandra Institute of Higher Education and Research, Porur, Chennai, Tamil Nadu, India
,
Srinivasan Rajappa
1   Department of Hand Surgery, Sri Ramachandra Institute of Higher Education and Research, Porur, Chennai, Tamil Nadu, India
,
Sandhiya Jaichandran
1   Department of Hand Surgery, Sri Ramachandra Institute of Higher Education and Research, Porur, Chennai, Tamil Nadu, India
,
Anil Bhat
2   Department of Hand Surgery, Kasturba Medical College, Manipal, Karnataka, India
,
Mukund Thatte
3   Department of Plastic Surgery, Bombay Hospital, Mumbai, Maharashtra, India
› Author Affiliations Funding None.
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Abstract

Background The absence of the palmaris longus (PL) varies with race. The presence of a functional flexor digitorum superficialis (FDS) of the little finger also varies widely. The aim of this study is to determine the prevalence of the absence of the PL and functional FDS of the little finger in the Indian population.

Materials and Methods This is a prospective observational study conducted as a part of the Indian normative data project of the Indian Society for Surgery of the Hand. The presence of the PL was assessed by Schaeffer's test. The function of the FDS was assessed by the standard test and modified test and its function designated as absent, present independently, or present combinedly with the ring finger FDS.

Results A total of 200 volunteers including 84 males and 116 females in the 21- to 60-year age group were examined. Of the 400 hands examined, the PL was absent in 26 upper limbs (6.5%). The PL was absent unilaterally in 12 individuals (6%) and bilaterally in 7 individuals (3.5%). Of the 400 little fingers examined, FDS function was absent in 72 fingers (18%), while 67 fingers (16.75%) had a common function and 261 fingers (65.25%) had an independent function. Only 2% had a bilateral absence of both the PL and functional FDS tendons and 5% had a unilateral absence of both tendons.

Conclusion The PL and FDS of the little finger were more absent in the right side than in the left side, but the difference was not statistically significant. There was no significant association between the absence of the PL and the absence of the functional FDS of the little finger.

Keywords

tendon absence - palmaris longus - flexor digitorum superficialis absence - Schaeffer's test - Baker's test - normative data

Authors' Contributions

Su.R. was the principal investigator for the project as a whole, and was responsible for data collection and writing the manuscript. Sr.R. was responsible for logistical support and editing the manuscript. A.B. was the coordinator of the ISSH Normative Data project, and contributed to editing of the manuscript. S.J. assisted in data collection. M.T. conceptualized the ISSH Normative Data project and contributed to editing of the manuscript.


Ethical Approval

Institutional review board clearance was obtained for the study and the study protocols conformed to the Declaration of Helsinki.




Publication History

Article published online:
16 August 2024

© 2024. Association of Plastic Surgeons of India. This is an open access article published by Thieme under the terms of the Creative Commons Attribution-NonDerivative-NonCommercial License, permitting copying and reproduction so long as the original work is given appropriate credit. Contents may not be used for commercial purposes, or adapted, remixed, transformed or built upon. (https://creativecommons.org/licenses/by-nc-nd/4.0/)

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  • References

  • 1 Ioannis D, Anastasios K, Konstantinos N, Lazaros K, Georgios N. Palmaris longus muscle's prevalence in different nations and interesting anatomical variations: review of the literature. J Clin Med Res 2015; 7 (11) 825-830
    CrossrefPubMedSearch in Google Scholar
  • 2 Yammine K. Clinical prevalence of palmaris longus agenesis: a systematic review and meta-analysis. Clin Anat 2013; 26 (06) 709-718
    CrossrefPubMedSearch in Google Scholar
  • 3 Tan J, Kim CH, Lee HJ, Chen J, Chen QZ, Jeon IH. A new examination method for anatomical variations of the flexor digitorum superficialis in the little finger. Clin Orthop Surg 2013; 5 (02) 138-144
    CrossrefPubMedSearch in Google Scholar
  • 4 Sebastin SJ, Lim AY, Wong H-B. Clinical assessment of absence of the palmaris longus and its association with other anatomical anomalies: a Chinese population study. Ann Acad Med Singap 2006; 35 (04) 249-253
    CrossrefPubMedSearch in Google Scholar
  • 5 Schaeffer JP. On the variations of the palmaris longus muscle. Anat Rec 1909; 3: 275-278
    Search in Google Scholar
  • 6 Kaplan EB. Muscular and tendinous variations of the flexor superficialis of the fifth finger of the hand. Bull Hosp Jt Dis 1969; 30 (01) 59-67
    Search in Google Scholar
  • 7 Baker DS, Gaul Jr JS, Williams VK, Graves M. The little finger superficialis: clinical investigation of its anatomic and functional shortcomings. J Hand Surg Am 1981; 6 (04) 374-378
    CrossrefPubMedSearch in Google Scholar
  • 8 Mugalur A, Shahane SM, Samant A, Pathak AC, Patil A, Reddy R. Anatomic variation of palmaris longus and flexor digitorum superficialis of little finger in Indian population. SICOT J 2015; 1: 5
    CrossrefPubMedSearch in Google Scholar
  • 9 Agarwal P. Absence of the palmaris longus tendon in Indian population. Indian J Orthop 2010; 44 (02) 212-215
    CrossrefPubMedSearch in Google Scholar
  • 10 Sankar KD, Bhanu PS, John SP. Incidence of agenesis of palmaris longus in the Andhra population of India. Indian J Plast Surg 2011; 44 (01) 134-138
    Thieme ConnectPubMedSearch in Google Scholar
  • 11 Sharma DK, Shukla CK, Sharma V. Clinical assessment of absence of palmaris longus muscle and its association with gender, body sides, handedness and other neighbouring anomalies in a population of central India. J Anat Soc India 2012; 61: 13-20
    CrossrefSearch in Google Scholar
  • 12 Tejaswi HL, Shilpashree YD. Clinical assessment of agenesis of palmaris longus and flexor digitorum superficial is in Indian population. International Journal of Recent Trends in Science And Technology 2014; 10: 492-494
    Search in Google Scholar
  • 13 Pai MM, Prabhu LV, Nayak SR. et al. The palmaris longus muscle: its anatomic variations and functional morphology. Rom J Morphol Embryol 2008; 49 (02) 215-217
    PubMedSearch in Google Scholar
  • 14 Patil GV. Shishirkumar, Thejeswari, et al. Study of absence of palmaris longus muscle in South Indian population. Int J Curr Res 2014; 6 (08) 7887-7889
    Search in Google Scholar
  • 15 Lalit M, Piplani S, Mahajan A, Verma P. Morphological analysis of palmaris longus muscle and its anatomic variations: a cadaveric study in North India. Ital J Anat Embryol 2019; 124: 443-454
    Search in Google Scholar
  • 16 Furnas DW. Muscle-tendon variations in the flexor compartment of the wrist. Plast Reconstr Surg 1965; 36 (03) 320-323
    CrossrefPubMedSearch in Google Scholar
  • 17 Shrewsbury MM, Kuczynski K. Flexor digitorum superficialis tendon in the fingers of the human hand. Hand 1974; 6 (02) 121-133
    CrossrefPubMedSearch in Google Scholar
  • 18 Austin GJ, Leslie BM, Ruby LK. Variations of the flexor digitorum superficialis of the small finger. J Hand Surg Am 1989; 14 (2, Pt 1): 262-267
    CrossrefPubMedSearch in Google Scholar
  • 19 Watanabe Y, Shirato R, Wada T, Iba K, Sonoda T, Yamashita T. Quantitative examination of isolated finger flexion associated with function of the flexor digitorum superficialis. J Phys Ther Sci 2020; 32 (11) 748-753
    CrossrefPubMedSearch in Google Scholar
  • 20 Thompson NW, Mockford BJ, Rasheed T, Herbert KJ. Functional absence of flexor digitorum superficialis to the little finger and absence of palmaris longus: is there a link?. J Hand Surg [Br] 2002; 27 (05) 433-434
    CrossrefPubMedSearch in Google Scholar
  • 21 Alzahrani MT, Almalki MA, Al-Thunayan TA, Almohawis AH, Al Turki AT, Umedani L. Clinical assessment of the congenital absence of palmaris longus and flexor digitorum superficialis muscles in young Saudi population. Anat Res Int 2017; 2017: 5342497
    PubMedSearch in Google Scholar
  • 22 Kigera JWM, Mukwaya S, Katusiime A. The relationship between functional absence of the flexor digitorum superficialis to the fifth digit and absence of the palmaris longus. EAOJ 2013; 7 (01) 11-13
    Search in Google Scholar