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Variations and morphometrics of palmaris longus in fetuses: a meta-analysis of cadaveric studies

  • Kaissar YammineEmail author
  • Mirela Erić
  • Chahine Assi
Review
  • 17 Downloads

Abstract

The palmaris longus muscle, and its tendon, is one of the most variable muscles in humans. Though it has been extensively researched in the adult population, its variations and development in the fetal period were rarely investigated. The aim of this meta-analysis is to conduct an evidence synthesis on PL variations and the prevalence of its agenesis during intrauterine development. Seven studies met the inclusion criteria comprising 497 fetuses and 1027 fetal limbs. The true and crude weighted prevalence rates were of 81.2% and 77%, respectively. The bilateral and unilateral prevalence estimates were of 62.2% and 15%, respectively. No significant differences were found for side-based and gender-based prevalence values. There were significant frequency differences between the studied populations (p < 0.0001).The Japanese population had the highest prevalence, the Turkish had the lowest and the European value was in between. Out of 494 studied muscles, 67 (13.5%) variations were noted. The weighted proportions of the commonest morphological variations were as follows: (a) bifid tendon in 10 (2%) cases, (b) inverted PL muscle in 9 (1.9%), muscle duplication in 6 (1.36%), and digastric muscle in 25 (5.1%). Prevalence values of the fetal PL were similar to those reported in adults; however, variations seem to be higher than in older populations. The true, crude, and ancestry-based prevalence presence rates of PL in fetuses were found to be similar to those of the adult population.

Keywords

Palmaris longus Anatomical variations Fetal anatomy 

Notes

Author contributions

KY: project development, search strategy, data collection, data analysis, manuscript writing. ME: search strategy, data collection, manuscript writing. CA: search strategy, manuscript writing.

Funding

None.

Compliance with ethical standards

Conflict of interest

The authors declare that they have no competing interest.

References

  1. 1.
    Anson B, McVay C (1958) Surgical anatomy, 5th edn. W.B. Sauders Company, PhiladelphiaGoogle Scholar
  2. 2.
    Albay S, Kastamoni Y, Sakalli B, Tunali S (2013) Anatomy and variations of palmaris longus in fetuses. Rom J Morphol Embryol 54(1):85–89PubMedGoogle Scholar
  3. 3.
    Caughell KA, McFarlane RM, McGrouther DA, Martin AH (1988) Developmental anatomy of the palmar aponeurosis and its relationship to the palmaris longus tendon. J Hand Surg 13(4):485–493.  https://doi.org/10.1016/S0363-5023(88)80083-2 CrossRefGoogle Scholar
  4. 4.
    Kędzia A, Ziajkiewicz M, Seredyn A, Dudek K (2009) Computer morphometric analysis of the palmaris longus muscle in the fetal period. Adv Clin Exp Med 18(5):437–447Google Scholar
  5. 5.
    Kocabiyik N, Yildiz S, Develi S, Ozan H, Yazar F (2014) Morphometric analysis of the palmaris longus muscle: a fetal study morphometric analysis of the palmaris longus muscle: a fetal study. Int J Exp Clin Anat 6(12):953–957.  https://doi.org/10.2399/ana.11.158 CrossRefGoogle Scholar
  6. 6.
    Leslie BM, Osterman AL, Wolfe SW (2017) Inadvertent harvest of the median nerve instead of the palmaris longus tendon. J Bone Jt Surg Am 99(14):1173–1182CrossRefGoogle Scholar
  7. 7.
    Lewis WH (1910) The development of the muscular system. In: Keibel F, Mall FP (eds) Manual of embryology, vol 2. J. B. Lippincott Company, Philadelphia, pp 455–522Google Scholar
  8. 8.
    Olewnik Ł, Waśniewska A, Polguj M, Podgórski M, Łabętowicz P, Ruzik K, Topol M (2018) Morphological variability of the palmaris longus muscle in human fetuses. Surg Radiol Anat 40(11):1283–1291.  https://doi.org/10.1007/s00276-018-2069-2 CrossRefPubMedPubMedCentralGoogle Scholar
  9. 9.
    Rajesh S, Singaram V, Anju Balaji M (2014) A study on morphology of palmaris longus. Int J Bioassays 3(05):2087–2089Google Scholar
  10. 10.
    Sato S (1969) Statistical studies on the anomalous muscles of the Kyushu-Japanese 4. The muscles of the upper limb. Kurume Med J 16(2):69–81.  https://doi.org/10.2739/kurumemedj.16.69 CrossRefPubMedGoogle Scholar
  11. 11.
    Thompson JW, McBatts J, Danforth CH (1921) Hereditary and racial variations in the musculus palmaris longus. Am J Phys Anthrop 4:205–218CrossRefGoogle Scholar
  12. 12.
    Unver Dogan N, Uysal II, Karabulut AK, Fazliogullari Z (2010) The motor branches of median and ulnar nerves that innervate superficial flexor muscles: a study in human fetuses. Surg Radiol Anat 32(3):225–233.  https://doi.org/10.1007/s00276-009-0580-1 CrossRefPubMedGoogle Scholar
  13. 13.
    Warmbrunn MV, de Bakker BS, Hagoort J, Alefs-de Bakker PB, Oostra RJ (2018) Hither to unknown detailed muscle anatomy in an 8-week-old embryo. J Anat 233(2):243–254.  https://doi.org/10.1111/joa.12819 CrossRefPubMedPubMedCentralGoogle Scholar
  14. 14.
    Yammine K (2013) Clinical prevalence of palmaris longus agenesis: a systematic review and meta-analysis. Clin Anat 26(6):709–718.  https://doi.org/10.1002/ca.22289 CrossRefPubMedGoogle Scholar
  15. 15.
    Yammine K (2014) Evidence-based anatomy. Clin Anat 27(6):847–852.  https://doi.org/10.1002/ca.22397 CrossRefPubMedPubMedCentralGoogle Scholar

Copyright information

© Springer-Verlag France SAS, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Department of OrthopedicsLebanese American University Medical Center-Rizk HospitalBeirutLebanon
  2. 2.Lebanese American University School of MedicineByblosLebanon
  3. 3.Center for Evidence-Based Anatomy, Sports and Orthopedic ResearchBeirutLebanon
  4. 4.Department of Anatomy, Faculty of MedicineUniversity of Novi SadNovi SadSerbia

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