Podcast
Questions and Answers
Which muscle is NOT considered a part of the hamstrings?
Which muscle is NOT considered a part of the hamstrings?
- Biceps femoris
- Semimembranosus
- Rectus femoris (correct)
- Semitendinosus
What is the primary action of the semimembranosus muscle?
What is the primary action of the semimembranosus muscle?
- Knee flexion (correct)
- Hip abduction
- Knee extension
- Hip flexion
Which blood vessel supplies the posterior compartment of the thigh?
Which blood vessel supplies the posterior compartment of the thigh?
- Tibial artery
- Femoral artery
- Perforating branches of profunda femoris artery (correct)
- Popliteal artery
What is the nerve supply to the hamstring muscles?
What is the nerve supply to the hamstring muscles?
Which of the following statements about the sciatic nerve is correct?
Which of the following statements about the sciatic nerve is correct?
Which muscle provides lateral rotation of the knee?
Which muscle provides lateral rotation of the knee?
What is the function of the adductor part of the adductor magnus muscle?
What is the function of the adductor part of the adductor magnus muscle?
Where does the long head of the biceps femoris originate?
Where does the long head of the biceps femoris originate?
Which muscles are innervated by the tibial part of the sciatic nerve?
Which muscles are innervated by the tibial part of the sciatic nerve?
What is the primary function of the popliteal fossa?
What is the primary function of the popliteal fossa?
Which nerve innervates the short head of biceps femoris?
Which nerve innervates the short head of biceps femoris?
What forms the floor of the popliteal fossa?
What forms the floor of the popliteal fossa?
What is the continuation of the femoral artery known as?
What is the continuation of the femoral artery known as?
What arterial branches does the popliteal artery give off?
What arterial branches does the popliteal artery give off?
Which structure is NOT found within the contents of the popliteal fossa?
Which structure is NOT found within the contents of the popliteal fossa?
What is the primary role of the tibial nerve in the leg?
What is the primary role of the tibial nerve in the leg?
Flashcards
Posterior Compartment of the Thigh
Posterior Compartment of the Thigh
The back of the thigh. Contains the hamstrings, sciatic nerve, and perforating branches of the profunda femoris artery.
Hamstrings
Hamstrings
The group of muscles that help extend the hip and flex the knee.
Biceps Femoris
Biceps Femoris
The longest muscle of the hamstring group
Semitendinosus
Semitendinosus
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Semimembranosus
Semimembranosus
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Posterior Part of Adductor Magnus
Posterior Part of Adductor Magnus
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Sciatic Nerve
Sciatic Nerve
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Perforating branches of Profunda Femoris Artery
Perforating branches of Profunda Femoris Artery
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Tibial Nerve
Tibial Nerve
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Common Fibular Nerve
Common Fibular Nerve
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Popliteal Fossa
Popliteal Fossa
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Lateral Boundary of Popliteal Fossa
Lateral Boundary of Popliteal Fossa
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Medial Boundary of Popliteal Fossa
Medial Boundary of Popliteal Fossa
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Floor of Popliteal Fossa
Floor of Popliteal Fossa
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Popliteal Artery
Popliteal Artery
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Genicular Branches of Popliteal Artery
Genicular Branches of Popliteal Artery
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Study Notes
Back of Thigh and Popliteal Fossa
- The sciatic nerve runs through the posterior thigh compartment and innervates the muscles there
- Perforating branches of the profunda femoris artery supply blood to the muscles
- The sciatic nerve branches into tibial and common fibular nerves
- The four hamstring muscles are Biceps femoris, Semitendinosus, Semimembranosus, and part of Adductor magnus
Posterior Compartment of Thigh Muscles
- Hip extensors and knee flexors are the functions of the muscles in this compartment
- The gluteus maximus, gluteus medius, and gluteus minimus are hip extensors
- Muscles such as the biceps femoris, semitendinosus, semimembranosus, and quadratus femoris are knee flexors and thigh extensors
Popliteal Fossa
- The popliteal fossa is a diamond-shaped space behind the knee
- It's a transitional area between the thigh and leg
- Important structures passing through include blood vessels and nerves
- Boundaries of the popliteal fossa are defined by muscles (Biceps femoris, Gastrocnemius, Plantaris, Semimembranosus, and Semitendinosus).
- The floor of the fossa is the popliteal surface of the femur and the popliteus muscle
- The roof is skin and fascia
- Contents include popliteal artery, vein, nerves, and lymph nodes
Popliteal Artery
- The continuation of the femoral artery after passing through the adductor hiatus
- Divides into anterior and posterior tibial arteries
- Gives off genicular branches in the popliteal fossa
- These genicular branches form anastomoses (connections) with other arteries
Tibial Nerve
- A branch of the sciatic nerve
- Supplies muscles in the posterior compartment of the thigh (long head of biceps femoris, semimembranosus, semitendinosus)
- It descends through the popliteal fossa, enters the posterior compartment of the leg and continues into the sole of the foot
- Innervates all muscles in the posterior compartment of the leg
Common Fibular Nerve
- A branch of the sciatic nerve
- Innervates the short head of biceps femoris in the posterior compartment of the thigh
- Continues into the lateral and anterior compartments of leg and foot
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