Biceps Femoris Muscle
Biceps Femoris Muscle is a muscle of the Back of Thigh (Hamstring Muscle Group).
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Terms
Soleus Muscle Gastrocnemius Muscle Adductor Muscle Semitendinosus Muscle Biceps Femoris Muscle Iliotibial Tract Gluteus Medius Muscle Gluteus Maximus Muscle Peroneus Longus Muscle Extensor Digitorum Longus Muscle Tibialis Anterior Muscle Pectineus Muscle Vastus Lateralis Muscle Vastus Medialis Muscle Rectus Femoris Muscle Sartorius Muscle Gracilis Muscle Adductor Longus Muscle
Biceps Femoris Muscle
STRUCTURE AND POSITION
- Biceps Femoris Muscle is a long muscle with two heads. Long Head is part of the Hamstring Muscles.
- It runs lateral to the Semitendinosus Muscle and has common origin with it too.
ATTACHMENTS
- Origin : Biceps Femoris Muscle arises from two heads. Long Head Arises from the Ischial Tuberosity of the Ischium. Short Head arises from the Linea Aspera and Lateral Supracondylar Ridge of the Femur.
- It runs superficial to the Adductor Magnus and lateral to the Semitendinosus Muscle, downwards.
- Insertion : Biceps Femoris Muscle is inserted into the Head of the Fibula Bone.
BLOOD SUPPLY
Biceps Femoris Muscle receives blood from the Inferior Gluteal Artery, Perforating Arteries and the Popliteal Artery Branches.
NERVE SUPPLY
Long Head of the Biceps Femoris Muscle is innervated by the Tibial Nerve. Short Head is innervated by the Common Fibular Nerve.
ACTION
- Biceps Femoris Muscle extends the Hip joint. (Long Head only)
- It also flexes the Knee Joint.
- It can laterally rotate the Knee Joint when in semiflexed position.
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