Question 1

Which muscle is primarily responsible for extension and lateral rotation at the hip joint?

Accepted Answer

Gluteus maximus

Question 2

A patient presents with difficulty abducting and medially rotating their thigh. Which muscle is most likely impaired?

Accepted Answer

Gluteus medius

Question 3

Which muscle group is innervated by the femoral nerve and is responsible for extension at the knee?

Accepted Answer

Quadriceps femoris group

Question 4

The sartorius muscle assists in which of the following actions?

Accepted Answer

Flexion, abduction, and lateral rotation of the thigh

Question 5

Which muscle is responsible for unlocking the knee by medially rotating the tibia when the femur is fixed?

Accepted Answer

Popliteus

Question 6

A soccer player sustains an injury resulting in loss of plantar flexion at the ankle. Which muscle is most likely damaged?

Accepted Answer

Gastrocnemius

Question 7

Which muscle is responsible for dorsiflexion at the ankle?

Accepted Answer

Tibialis anterior

Question 8

A patient is unable to adduct their thigh. Which muscle is most likely affected?

Accepted Answer

Adductor longus

Question 9

Which muscle flexes the big toe?

Accepted Answer

Flexor hallucis longus

Question 10

Which of the following best describes compartment syndrome?

Accepted Answer

Compression of nerves, blood vessels, and muscle inside a closed space leading to tissue death from lack of oxygenation

Question 11

Which muscle is responsible for eversion of the foot and also assists in plantar flexion?

Accepted Answer

Fibularis longus

Question 12

A patient cannot extend their knee after a femoral nerve injury. Which muscle is most likely paralyzed?

Accepted Answer

Rectus femoris

Question 13

Which muscle originates from the ischial tuberosity and is involved in flexion at the knee?

Accepted Answer

Semitendinosus

Question 14

Which muscle group is primarily responsible for adduction, flexion, and medial rotation at the hip?

Accepted Answer

Adductor group

Question 15

Which muscle is missing in about 10% of people and is often mistaken for a nerve by first-year medical students?

Accepted Answer

Plantaris

Question 16

Which muscle is responsible for extension of toes 2-5?

Accepted Answer

Extensor digitorum longus

Question 17

Which of the following is a function of the deep fascia in the lower limb?

Accepted Answer

It supports and interconnects adjacent skeletal muscles while permitting independent movement

Question 18

A runner experiences pain and swelling in the anterior compartment of the leg after a long race. What is the most likely diagnosis?

Accepted Answer

Compartment syndrome

Question 19

Which muscle is responsible for abduction of the big toe?

Accepted Answer

Abductor hallucis

Question 20

Which muscle is responsible for inversion of the foot and plantar flexion?

Accepted Answer

Tibialis posterior

Muscles and Compartments of the Lower Appendage

Study Guide - Practice Questions