Accessory soleus muscle

In humans, the accessory soleus muscle is the most common accessory muscle in the ankle.[1] It is often asymptomatic.

Accessory soleus muscle
LatinMusculus soleus accessorius
Anatomical terms of muscle

The muscle inserts on the anterior aspect of the soleus muscle or on the posterior aspect of the tibia or the muscles of the deep posterior compartment. It lies anterior to the calcaneal tendon and terminates on the calcaneal tendon or the superior or medial aspect of the calcaneus via fleshy fibers or a distinct tendon.[2]

Present in approximately 3% (or 10%)[3] of people, this muscle usually appears as a distant belly, medial to the Achilles tendon. Clinically, the accessory soleus may be associated with pain and edema during periods of prolonged exercise.[4]


  1. Ly, Justin Q.; Bui-Mansfield, Liem T. (2004). "Anatomy of and Abnormalities Associated with Kager's Fat Pad". American Journal of Roentgenology. 182 (1): 147–154. doi:10.2214/ajr.182.1.1820147. PMID 14684529.
  2. Kouvalchouk, J. F.; Lecocq, J.; Parier, J.; Fischer, M. (2005). "The accessory soleus muscle: A report of 21 cases and a review of the literature". Revue de Chirurgie Orthopedique et Reparatrice de l'Appareil Moteur. 91 (3): 232–8. PMID 15976667.
  3. Kouvalchouk JF, et al. 2018.
  4. Moore, Keith L; & Dalley Arthur R (2006). Clinically Oriented Anatomy (5th ed.). Lippincott Williams and Wilkins. ISBN 0-7817-3639-0
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