Question 1

A patient is unable to flex their forearm at the elbow after an injury. Which muscle is most likely damaged?

Accepted Answer

Biceps brachii

Question 2

Which muscle is primarily responsible for the movement of raising your eyebrows?

Accepted Answer

Frontalis (Occipitofrontalis)

Question 3

A soccer player tears their hamstring during a sprint. Which of the following muscles is NOT part of the hamstring group?

Accepted Answer

Rectus femoris

Question 4

Which muscle is responsible for compressing the cheeks, as in blowing a trumpet?

Accepted Answer

Buccinator

Question 5

During a bench press, which muscle acts as the primary mover for horizontal adduction of the arm at the shoulder joint?

Accepted Answer

Pectoralis major

Question 6

A patient presents with difficulty abducting their arm at the shoulder. Which muscle of the rotator cuff is most likely affected?

Accepted Answer

Supraspinatus

Question 7

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

Accepted Answer

Tibialis anterior

Question 8

If the phrenic nerve is damaged, which muscle's function will be most directly impaired, potentially affecting breathing?

Accepted Answer

Diaphragm

Question 9

Which muscle group is responsible for extending the knee joint?

Accepted Answer

Quadriceps group

Question 10

A patient is unable to retract their scapula. Which muscle is most likely weakened?

Accepted Answer

Rhomboid major

Question 11

Which abdominal muscle runs horizontally and is primarily responsible for compressing the abdominal contents?

Accepted Answer

Transversus abdominis

Question 12

A patient has difficulty flexing their thigh at the hip joint. Which muscle is most likely involved?

Accepted Answer

Psoas

Question 13

Which muscle is responsible for plantarflexion at the ankle joint during activities such as standing on tiptoes?

Accepted Answer

Gastrocnemius

Question 14

A violinist is experiencing pain from repetitive finger flexion. Which muscle group is most likely overused?

Accepted Answer

Anterior flexors of the forearm

Question 15

Which muscle is NOT involved in facial expression?

Accepted Answer

Masseter

Question 16

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

Accepted Answer

Adductor longus

Question 17

Which muscle is responsible for flexing the wrist?

Accepted Answer

Flexor carpi ulnaris

Question 18

A patient presents with winged scapula after a nerve injury. Which muscle is most likely paralyzed?

Accepted Answer

Serratus anterior

Question 19

Which muscle is the primary extensor of the forearm at the elbow joint?

Accepted Answer

Triceps brachii

Question 20

A patient is unable to elevate their shoulders (shrug). Which muscle is most likely affected?

Accepted Answer

Trapezius

Study Guide: Major Muscles of the Human Body – Head, Torso, Arm, and Leg

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