Question 1

Which muscle is primarily responsible for flexion of the forearm at the elbow joint, as shown in the anterior view of the arm in image 3?

Accepted Answer

Biceps brachii

Question 2

A patient presents with difficulty extending their forearm at the elbow. Based on the posterior view of the arm in image 4, which muscle is most likely impaired?

Accepted Answer

Triceps brachii

Question 3

Which muscle, visible in image 9, is responsible for lateral flexion of the trunk and is a key postural muscle?

Accepted Answer

Iliopsoas

Question 4

In image 10, which muscle is shown running obliquely across the anterior thigh and is known as the longest muscle in the human body?

Accepted Answer

Sartorius

Question 5

A soccer player sustains an injury to the muscle highlighted in image 11. Which action would most likely be weakened?

Accepted Answer

Flexion of the hip

Question 6

Which muscle group, shown in image 12, is primarily responsible for extending the knee joint?

Accepted Answer

Quadriceps femoris

Question 7

A patient is unable to dorsiflex their foot after a leg injury. Which muscle, shown in image 13, is most likely affected?

Accepted Answer

Tibialis anterior

Question 8

Which muscle, visible in image 15, is responsible for plantar flexion of the foot and is commonly injured in runners?

Accepted Answer

Gastrocnemius

Question 9

In image 8, which muscle is responsible for thumb opposition, allowing the thumb to touch the tips of the other fingers?

Accepted Answer

Opponens pollicis

Question 10

A patient presents with wrist drop after a humeral fracture. Which muscle, shown in image 6, is most likely affected due to radial nerve injury?

Accepted Answer

Extensor carpi radialis longus

Question 11

Which muscle, shown in image 1, is primarily responsible for closing the jaw during mastication?

Accepted Answer

Temporalis

Question 12

A patient is unable to abduct their arm beyond 15 degrees. Which muscle, visible in image 2, is most likely impaired?

Accepted Answer

Deltoid

Question 13

Which muscle, shown in image 14, is responsible for eversion of the foot and is commonly injured in ankle sprains?

Accepted Answer

Fibularis (peroneus) longus

Question 14

A pianist complains of pain and weakness in finger flexion. Which muscle group, shown in image 8, is most likely involved?

Accepted Answer

Flexor digitorum superficialis and profundus

Question 15

Which muscle, visible in image 5, is responsible for protracting the scapula and is essential for pushing movements?

Accepted Answer

Serratus anterior

Question 16

A patient has difficulty flexing their thigh at the hip and extending their knee. Which two muscles, shown in images 9 and 12, are most likely affected?

Accepted Answer

Iliopsoas and quadriceps femoris

Question 17

Which muscle, shown in image 7, is responsible for flexion and abduction of the wrist?

Accepted Answer

Flexor carpi radialis

Question 18

A runner experiences pain in the posterior lower leg after sprinting. Which muscle, shown in image 15, is most likely strained?

Accepted Answer

Gastrocnemius

Question 19

Which muscle, visible in image 13, is the primary dorsiflexor of the foot and is commonly involved in shin splints?

Accepted Answer

Tibialis anterior

Question 20

A patient is unable to extend their fingers at the metacarpophalangeal joints. Which muscle group, shown in image 8, is most likely affected?

Accepted Answer

Extensor digitorum

Anatomy of the Muscular System: Key Muscles and Their Locations

Guida di studio - Domande di pratica

Study guide - Flashcard