HSS Journal

, Volume 7, Issue 1, pp 52–56 | Cite as

Accessory Plantaris Muscle: Anatomy and Prevalence

Original Article

Abstract

Accessory and anomalous muscles have been described in humans, but only a few at the level of the knee. The aim of this retrospective cohort analysis was to determine the prevalence of a new accessory muscle located at the level of the knee detected with magnetic resonance imaging (MRI). The accessory muscle is designated an accessory plantaris muscle in this study due to its intimate origin with the normal plantaris muscle. Retrospective review of 1,000 consecutive MRI exams of the knee performed on patients presenting with acute or chronic knee symptoms revealed an accessory plantaris muscle in 63 of the 1,000 patients (6.3%)—38 males (7.5%) and 25 females (5.1%). Origin of 62 of 63 of the accessory plantaris muscles merged with the origin of the normal plantaris muscle, and one of 63 merged with the origin of the lateral head of the gastrocnemius muscle. These accessory plantaris muscles inserted into the iliotibial band, the lateral patellar retinaculum, or the iliotibial tract.

Keywords

accessory plantaris muscle accessory knee muscle 

References

  1. 1.
    Banjo AO. Aberrant popliteus muscle: anatomy and clinical consideration. Afr J Med Med Sci. 1996;25:69–73.PubMedGoogle Scholar
  2. 2.
    Bergman RA, Thompson SA, Afifi AK, Saadeh FA. Compendium of human anatomic variation. Baltimore: Urban & Schwarzendberg; 1988; 22–28.Google Scholar
  3. 3.
    Chason DP, Schultz SM, Fleckenstein JL. Tensor fascia suralis: depiction on MR images. AJR. 1995;165:1220–1221.PubMedGoogle Scholar
  4. 4.
    Macedo TA, Johnson CM, Hallett JW, Breen JF. Popliteal artery entrapment syndrome: role of imaging in the diagnosis. AJR. 2003;181:1259–1265.PubMedGoogle Scholar
  5. 5.
    Montet X, Sandoz A, Mauget D, Martinoli C, Bianchi S. Sonographic and MRI appearance of tensor fasciae suralis muscle, an uncommon cause of popliteal swelling. Skeletal Radiol. 2002;31:536–538.CrossRefPubMedGoogle Scholar
  6. 6.
    Sinav A, Gumusalan Y, Arifoglu Y, Onderoglu S. Accessory muscular bundles arising from the biceps femoris muscle. Kaibogaku Zasshi. 1995;70:245–247.PubMedGoogle Scholar

Copyright information

© Hospital for Special Surgery 2010

Authors and Affiliations

  1. 1.Department of RadiologyHospital for Special SurgeryNew YorkUSA

Personalised recommendations