You are going to kick a ball. You are supporting your body with your left lower

Question

You are going to kick a ball. You are supporting your body with your left lower extremity. Your right lower extremity is extended at the hip, flexed at the knee and plantarflexed at the ankle. Based on this scenario answer the following questions:

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6. Which of the following best represents the muscles involved acting on the right hip?

A.Iliopsoas, rectus femoris, gluteus maximus

B.Gluteus maximus, adductor magnus, biceps femoris

C.   Biceps femoris, Rectus Femoris, Gluteus medius

D.   Adductor Longus, Semitendinosus,    Semimembraneosus

7. Based on your answer to #6, which of the following best represents the main antagonist to those muscles listed?

A. Gluteus Maximus

B. Semitendinosus

C. Adductor Magnus

D. Iliopsoas

8. Which of the following best represents the muscles involved acting on the right ankle?

A. Tibialis anterior, Peroneus Tertius

B. Tibialis posterior, peroneus longus

C. All of the above

D. None of the above

Explanation / Answer

Right lower extremity is extended at the hip, flexed at the knee and plantar flexed at the ankle.

6) Muscles involved in causing extension at the right hip are gluteus maximus, adductor magnus and biceps femoris (option b). Gluteus maximus is powerful extensor of hip and also causes abduction at hip joint. Adductor magnus causes adduction and extension of hip while biceps femoris extends knee joint, flexes and laterally rotates knee joint. Synergists for this action are semitendinosus and semimembraneoses. Antagonist mucles are Iliopsoas which causes flexion at hip joint.

7) Iliopsoas causes flexion at hip joint. It is antagonist to the action of gluteus maximus, adductor magnus and biceps femoris. So, the answer for this question is option (D) Iliopsoas

8) Tibialis posterior causes inversion and plantar flexion. peroneous longus causes eversion and plantar flexion. So,the answer for this question is option (B) tibialis posterior and peroneous longus

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