biceps femoris

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Related to biceps femoris: quadriceps femoris

biceps femoris

See biceps.

biceps femoris

Etymology: L, bis, twice, caput, head, femoris, thigh
one of the posterior femoral muscles. It has two heads at its origin. The biceps femoris flexes the leg and rotates it laterally and extends the thigh, rotating it laterally. It is one of the hamstring muscle group and lies on the posterior, lateral side of the thigh.
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Biceps femoris

biceps femoris

A two-headed major muscle of the leg.

Long head
Inner medial ischial tuberosity and sacrotuberous ligament.
Head of fibula and lateral condyle of tibia.
Extends thigh and flexes leg.
Tibial branch of the sciatic nerve (L5, S2).

Short head
Lateral linea aspera and lateral intermuscular septum.
Lateral condyle of tibia.
Flexes leg.
Common peroneal branch of the sciatic nerve (L5, S2).

biceps femoris

two-headed posterior thigh muscle
  • origin long head: from medial ischial tuberosity; short head: from femoral linea aspera and the upper half of the supracondylar line

  • insertion heads unite to insert into head of the fibula

  • nerve supply long head: sciatic nerve; short head: common peroneal nerve

  • action hip joint extension and knee joint flexion; external leg rotation from hip when knee joint is flexed; note: short head acts only on the knee joint


a muscle having two heads. There is a biceps muscle in both fore- and hindlimbs. See Table 13. See also bicipital.

biceps brachii
is a large fusiform muscle lying on the cranial surface of the humerus. Its function is to flex the elbow and integrate the actions of the shoulder and elbow. A medial displacement of the tendon of origin has been reported in dogs, causing a weight-bearing lameness.
biceps femoris
a large muscle of the caudolateral part of the thigh. Its function is to extend the hindlimb when propelling the body, during rearing or kicking. All of the joints are affected except those of the digit.
Rupture of the muscle causes acute hindlimb lameness in cattle. Resembles an intermittent upward fixation of the patella, with extension of the stifle and hock.
biceps reflex
is elicited in dogs by striking a finger placed on the biceps tendon on the craniomedial aspect of the elbow. An active reflex indicates intact spinal cord segments and nerve roots C6-8 and musculocutaneous nerve. It becomes exaggerated in disease of the upper motor neuron.
biceps tendon ossification
causes lameness in the horse. Is radiographically apparent.
References in periodicals archive ?
w]) of the biceps femoris muscle was determined at 25[degrees]C with a Novasina measuring instrument, model AW SPRINT-TH 300 (Pfaffikon, Switzerland).
If nerve repair fails, a transfer of the biceps femoris and semitendinosus to the patella can be performed.
The one-way analyses of variance (ANOVA) for repeated measuring were used to determine the effect of rms of EMG vastus lateralis and biceps femoris properties before and after exercise.
Muscle activity of the biceps femoris and semitendinousus muscles was expressed relative to muscle activity during maximal isometric leg flexion.
In the analysis of the biceps femoris muscle, the volunteers remained in supine position with a 45[degrees] knee flexion and hip lateral rotation.
To determine the degree of intramuscular fat infiltration, the RF, vasti, semitendinosis, and biceps femoris (long head) were outlined on the mid-thigh slice and NIH Image was used to generate a frequency distribution of signal intensity for each muscle (Figure 1C).
In the upper lateral corner the common peroneal nerve passes close to the medial border of biceps femoris.
A sagittal cut section of the amputated specimen revealed a mass, measuring 8 x 9 x 13 cm, located in the biceps femoris.
The pattern was fairly consistent with the exception of the branch innervating the long head of the biceps femoris muscle, which differed for one of the samples.
The hamstrings are made up of three separate muscles: semimembranosus, semitendinosus, and biceps femoris, the latter with a long and short head.
In case of the knee flexors the excessive activity of Biceps Femoris can be noticed both for the left and right lower limb (Figs.