Double origin of the extensor hallucis longus muscle: a case report
Most of the anatomic variations of the extensor hallucis longus (EHL) muscle are related to the tendon of insertion. We show a double origin of the EHL from the medial aspect of the fibula and the lateral aspect of the tibia. A 27-year-old male with a double closed fracture of tibia and fibula showed an involuntary extension of the big toe during foot plantar flexion after surgery. A tendon fibrosis by the fixation plates could be the cause of the foot functional alteration. Interestingly, the anatomic variation described could be related to the postsurgical foot dysfunction, since when the fibrotic tissue was removed the normal extension of big toe recovered. As illustrated in this case report, knowledge of anatomic variations is very useful, particularly in the context of foot surgery.
KeywordsHallucis longus muscle Anatomic variations Foot dysfunction Foot surgery
Compliance with ethical standards
Conflict of interest
The authors declare that they have no conflict of interest to disclose.
- 2.Al-saggaf S (2003) Variations in the insertion of the extensor hallucis longus muscle. Folia Morphol (Warsz) 62:147–155Google Scholar
- 4.Bergman RA, Afifi AK, Miyauchi R (2010) Illustrated encyclopedia of human anatomic variation: Opus I: muscular system: alphabetical listing of muscles: E. https://www.anatomyatlases.org/AnatomicVariants/MuscularSystem/Text/E/23Extensor.shtml
- 7.Gruber W (1875) Über die varietäten des musculus extensor hallucis longus. Arch Anat Physiol Wissen Med 1875:565–589Google Scholar
- 12.Testut L, Latarjet A (1928) Traité d’anatomie humaine, vol 1. Doin, Paris, p 1149Google Scholar
- 14.Williams PL, Bannister LH, Berry MM et al (1995) Gray’s anatomy: the anatomical basis of medicine and surgery, 38th edn. Churchill Livingstone, EdinburghGoogle Scholar