Question 1

Which muscle is the prime mover for flexion of the thigh at the hip joint?

Accepted Answer

Iliopsoas

Question 2

A patient presents with difficulty extending their knee and flexing their hip. Which muscle is most likely affected?

Accepted Answer

Rectus femoris

Question 3

Which group of muscles is primarily responsible for adducting the thigh?

Accepted Answer

Adductor group (magnus, longus, brevis, pectineus, gracilis)

Question 4

During the backswing phase of walking, which muscle group is most active in extending the thigh and flexing the leg?

Accepted Answer

Hamstrings

Question 5

Which nerve innervates the muscles of the anterior compartment of the thigh, including the quadriceps femoris?

Accepted Answer

Femoral nerve

Question 6

A soccer player sustains a 'pulled hamstring' injury. Which of the following muscles is NOT part of the hamstring group?

Accepted Answer

Rectus femoris

Question 7

Which muscle is responsible for dorsiflexion and inversion of the foot at the ankle joint?

Accepted Answer

Tibialis anterior

Question 8

A patient is unable to plantar flex their foot. Which nerve is most likely damaged?

Accepted Answer

Tibial nerve

Question 9

Which muscle is the major extensor of the thigh and also laterally rotates the thigh?

Accepted Answer

Gluteus maximus

Question 10

Which muscle group is responsible for stabilizing the lateral ankle and the lateral longitudinal arch of the foot?

Accepted Answer

Fibularis (peroneus) longus and brevis

Question 11

Which muscle is the prime mover for extension of the knee?

Accepted Answer

Quadriceps femoris

Question 12

A patient has foot drop, characterized by inability to dorsiflex the foot. Which muscle is most likely paralyzed?

Accepted Answer

Tibialis anterior

Question 13

Which muscle assists in both flexion and abduction of the thigh, and steadies the leg and trunk on the thigh?

Accepted Answer

Tensor fasciae latae

Question 14

Which of the following muscles is innervated by the obturator nerve and is involved in adduction, flexion, and medial rotation of the thigh?

Accepted Answer

Adductor longus

Question 15

Which muscle is responsible for extending the great toe and dorsiflexing the foot?

Accepted Answer

Extensor hallucis longus

Question 16

A runner experiences pain in the posterior thigh and difficulty flexing the knee. Which nerve is most likely involved?

Accepted Answer

Sciatic nerve

Question 17

Which muscle is the primary inverter of the foot and also assists in plantar flexion?

Accepted Answer

Tibialis posterior

Question 18

Which muscle is most responsible for the powerful push-off during running and jumping, acting as a major plantar flexor of the ankle?

Accepted Answer

Gastrocnemius

Question 19

Which muscle is located on the dorsal aspect of the foot and assists in extending the toes?

Accepted Answer

Extensor digitorum brevis

Question 20

A patient is unable to abduct their thigh. Which muscle is most likely paralyzed?

Accepted Answer

Gluteus medius

Muscles of the Hip, Thigh, Leg, and Foot: Structure, Function, and Innervation

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