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 leg at the knee after a sports injury. Which muscle group is most likely affected?

Accepted Answer

Quadriceps femoris

Question 3

Which nerve innervates the hamstring muscles?

Accepted Answer

Sciatic nerve

Question 4

During the backswing phase of walking, which muscle group is primarily responsible for extending the thigh and flexing the leg?

Accepted Answer

Hamstrings

Question 5

Which muscle is NOT part of the quadriceps femoris group?

Accepted Answer

Biceps femoris

Question 6

A soccer player experiences a 'pulled groin.' Which muscle group is most likely injured?

Accepted Answer

Adductors

Question 7

Which muscle is responsible for both abduction and medial rotation of the thigh?

Accepted Answer

Gluteus medius

Question 8

Which of the following muscles laterally rotates the thigh?

Accepted Answer

Piriformis

Question 9

If the obturator nerve is damaged, which action would be most impaired?

Accepted Answer

Adduction of the thigh

Question 10

Which muscle originates on the anterior inferior iliac spine and inserts into the patella via the quadriceps tendon?

Accepted Answer

Rectus femoris

Question 11

A patient cannot dorsiflex their foot after a fibular fracture. Which muscle is most likely affected?

Accepted Answer

Tibialis anterior

Question 12

Which muscle is the prime mover for plantar flexion at the ankle joint?

Accepted Answer

Gastrocnemius

Question 13

Which muscle is responsible for eversion of the foot?

Accepted Answer

Fibularis longus

Question 14

Which muscle is innervated by the superior gluteal nerve and is involved in abduction of the thigh?

Accepted Answer

Gluteus medius

Question 15

A runner complains of pain in the posterior thigh after sprinting. Which muscle group is most likely strained?

Accepted Answer

Hamstrings

Question 16

Which muscle assists the iliopsoas in flexing the thigh at the hip joint?

Accepted Answer

Tensor fasciae latae

Question 17

Which muscle is a powerful knee extensor and is innervated by the femoral nerve?

Accepted Answer

Rectus femoris

Question 18

Which muscle is involved in both flexion and medial rotation of the thigh?

Accepted Answer

Pectineus

Question 19

Which muscle is the only quadriceps muscle that crosses both the hip and knee joints?

Accepted Answer

Rectus femoris

Question 20

Which muscle is most responsible for lateral rotation of the thigh and is innervated by the obturator nerve?

Accepted Answer

Obturator externus

Muscles Crossing the Hip and Knee Joints: Movements of the Thigh and Leg chapter 10 part 4

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