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 ?
Independent crank cycling with increasing load causes a more constant contraction of the biarticular muscles, rectus femoris and biceps femoris, compared to normal crank cycling.
The injection of 1 mol/L N-isopropyl oxamate in the biceps femoris of plateau pika for 30 min resulted in blood concentration of N-isopropyl oxamate of 0.
The results showed an increase in T2 signal intensity in all the thigh muscles immediately after Pilates apparatus training, corresponding to the increase in metabolic muscle activity, except for the biceps femoris (long head).
Contrary to expectations, the "Healthy" group had the greatest proportion of participants who developed muscle fatigue in the erector spinae (70%), biceps femoris (40%) and rectus femoris (40%) muscles and the second highest percentage for gastrocnemius.
Results are in accord with about that there is a positive relationship between the EMG records of biceps femoris muscle and jump height in elite female rhythmic gymnasts (Arpinar, Nalcakan, Akhisarlioglu, Kutlay, Kosay, 2003).
Abbreviations: BF = biceps femoris, BWS = body weight support, EMG = electromyography, MG = medial gastrocnemius, RF = rectus femoris, TA = tibialis anterior.
During one drop jump we calculated EMG of vastus lateralis, biceps femoris, and peak values of hip, knee and ankle angles.
The wireless Myomonitor[R] was placed around the dancer's waist with a secured belt, and electrodes were placed on the muscle bellies of the vastus medialis (VM), vastus lateralis (VL), and biceps femoris (BF) of each participant's landing leg, following the guidelines reported by Kellis and Kouvelioti.
Los siguientes musculos individuales fueron retirados de los cortes comerciales: Supraspinatus, Infraspinatus, Triceps brachii, Longissimus thoracis, Longissimus lumborum, Psoas major, Gluteus medius, Semitendinosus, Biceps femoris, Quadriceps femoris, Semimembranosus, Aducctor.
During the SEBTs the biceps femoris was most active during the posterior, posterolateral, and lateral excursions.
They all run in similar paths, all originating from the bottom of your pelvis (or Ischial Tuberosity), running down the back of your leg with the Semimembranosis and Semitendinosis attaching on the inside of your knee and the Biceps Femoris to the outside of your knee.
Fascia later was incised to the entire length of skin incision along the cranial border of biceps femoris muscle aponeurosis.