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Composed in part of tendon; denoting the semitendinosus muscle.
Synonym(s): semitendinosus
[L. semitendinosus]


Etymology: L, semi + tendere, to stretch
one of three posterior femoral muscles of the thigh, remarkable for the great length of the tendon of insertion. It is a fusiform muscle located in the posterior and medial part of the thigh, arising from the tuberosity of the ischium. It ends just distal to the middle of the thigh in a long round tendon that crosses the semimembranosus and curves around the medial condyle of the tibia and inserts into the medial surface of the tibia. It functions to flex the leg, to rotate it medially after flexion, and to extend the thigh. Compare biceps femoris, hamstring muscle, semimembranosus.
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(sĕm″ē-tĕn″dĭn-ō′sŭs) [L.]
The fusiform muscle of the posterior and inner part of the thigh.


posterior thigh muscle
  • origin medial ischial tuberosity (with long head of biceps femoris)

  • insertion upper part of medial surface of tibia inferior to knee joint, posterior to tendons of gracilis and sartorius

  • nerve supply tibial nerve

  • action as semimembranosus

References in periodicals archive ?
a hamstring injury of the semitendinosus muscle that does not affect
A recent study showed that the anatomic footprint of the semitendinosus and long head of the biceps femoris is oval-shaped and typically measures 2.
Normalized EMG amplitude values from the biceps femoris and semitendinosus muscles before and after stretching of the contrary quadriceps muscle in the three groups during the isokinetic leg flexion and extension movements in concentric and eccentric modes [mean [+ or -] SEM (95% CI)].
A long-term follow-up study after medial patellofemoral ligament reconstruction using the transferred semitendinosus tendon for patellar dislocation.
For all fetuses, the semitendinosus muscle (ST) was dissected, weighed and a complete mid belly transverse slice rapidly frozen in liquid nitrogen.
Anatomic technique using semitendinosus graft showed improved outcome over the non-anatomic procedure using hook plate.
In this study, the sensory analysis results of the samples obtained from the Longissimus dorsi (LD), triceps brachi Triceps brachi (TB) and Semitendinosus (SMD) muscles of the Awassi and Red Karaman sheep breeds were tried to be researched by using the grey relational analysis together with which ones were more preferred in terms of breed and muscle type.
A tibialis anterior allograft was used instead of the described semitendinosus graft, and no figure eight loop was incorporated into the reconstruction.
The samples were collected from cross-sections of the following muscles: Gluteus medius (top sirloin cap, n=9); Biceps femoris (outside round, n =1); Semimembranosus (inside round, n = 13); Longissimus dorsi (striploin, n =4); Semitendinosus (eye of round, n =4); and Quadriceps femoris (knuckle, n =4).
After the postmortem chill period, samples of the following muscles were removed from the left carcasses: Biceps femoris (BF), Gluteus medius (GM), Longissimus (LD), Semitendinosus (ST) and Trapezius thoracis (TT).
Use of a semitendinosus tendon autogenous graft for rupture of the patellar ligament after total knee arthroplasty.
The anserine bursal complex, located approximately 5 cm distal to the medial joint line, is formed by the combined insertion of the sartorius, gracilis, and semitendinosus tendons, (39) but the exact mechanism of pain is not well understood.