Nathan H, Gloobe H, Yosipovitch Z: Flexor digitorum accessorius longus. .Clin Orthop 113::158. ,1975. .
VanCourt RB, Siesel KJ: Flexor digitorum accessorius longus muscle. .JAPMA 86::559. ,1996. .
Peterson DA, Stinson W, Lairmore JR: The long accessory flexor muscle: an anatomical study. .Foot Ankle Int 16::637. ,1995. .
Cheung YY, Rosenberg ZS, Colon E, et al: MR imaging of flexor digitorum accessorius longus. .Skeletal Radiol 28::130. ,1999. .
Sammarco GJ, Stephens MM: Tarsal tunnel syndrome caused by the flexor digitorum accessorius longus. .J Bone Joint Surg Am 72::453. ,1990. .
Canter DE, Siesel KJ: Flexor digitorum accessorius longus muscle: an etiology of tarsal tunnel syndrome. ?J Foot Ankle Surg 36::226. ,1997. .
Yüksel M, ÖnderoĞlu S, Yener N, et al: An accessory flexor digitorum longus muscle. .Acta Anat 148::62. ,1993. .
Ho VW, Peterfy C, Helms CA: Tarsal tunnel syndrome caused by strain of an anomalous muscle: an MRI-specific diagnosis. .J Comput Assist Tomogr 17::822. ,1993. .
Sammarco GJ, Conti SF: Tarsal tunnel syndrome caused by an anomalous muscle. .J Bone Joint Surg Am 76::1308. ,1994. .
Pac L, Malinovsky L Jr: Muscle flexor digitorum longus accessorius in the lower limb of man. .Anat Anz 159::253. ,1985. .
Grogone JS, Jowsey J: Flexor accessorius longus: an unusual muscle anomaly. .J Bone Joint Surg Br 47::118. ,1965. .
Sarrafian SK: “Myology,” in Anatomy of the Foot and Ankle: Descriptive, Topographic, Functional, p 246, JB Lippincott, Philadelphia, 1983..
Cimino WR: Tarsal tunnel syndrome: review of the literature. .Foot Ankle 11::47. ,1990. .
Malay DS, McGlamry ED: “Acquired Neuropathies of the Lower Extremity,” in Comprehensive Textbook of Foot Surgery, 2nd Ed, ed by ED McGlamry, AS Banks, MS Downey, p 1115, Williams & Wilkins, Baltimore, 1992..
Buschmann WR, Cheung Y, Jahss MH: Magnetic resonance imaging of anomalous leg muscles: accessory soleus, peroneus quartus and the flexor digitorum longus accessorius. .Foot Ankle 12::115. ,1991. .
Gordon SL, Matheson DW: The accessory soleus. .Clin Orthop 97::129. ,1973. .
Gumusalan Y, Kalaycioglu A: Bilateral accessory flexor digitorium longus muscle in man. .Ann Anat 182::573. ,2000. .
Kubota H, Noguchi Y, Urabe K, et al: Flexor digitorum longus accessorius in the club foot of an infant with Nager syndrome. .Arch Orthop Trauma Surg 121::95. ,2001. .
The flexor digitorum accessorius longus muscle was observed during a cadaveric surgery course on the foot and ankle for third-year podiatric medical students. The cadaveric foot had been amputated just proximal to the ankle level so that the muscle origin could not be determined; its insertion, however, was found to be into the flexor digitorum longus tendon, just before the tendon split into its digital slips. This article reviews the literature on the muscle and its clinical implications and describes and shows the muscle as it was seen in this case. (J Am Podiatr Med Assoc 92(8): 463-466, 2002)