back of trunk muscles

Play an AI-generated podcast conversation about this lesson

What is the primary action of the anterior part of the deltoid muscle?

Adducts the arm

Medially rotates the arm (correct)

Laterally rotates the arm

Extends the arm

Which muscle assists the deltoid in the abduction of the arm?

Infraspinatus

Supraspinatus (correct)

Teres Major

Teres Minor

Which of the following muscles is primarily responsible for lateral rotation of the arm?

Deltoid

Teres Major

Infraspinatus (correct)

Subscapularis

What nerve innervates the Teres Major muscle?

Lower subscapular nerve Signup and view all the answers

Which rotator cuff muscle is located on the anterior surface of the scapula?

Subscapularis Signup and view all the answers

What is the insertion point of the Teres Minor muscle?

Greater tubercle of humerus Signup and view all the answers

Which action is primarily associated with the Teres Major muscle?

Medial rotation of the arm Signup and view all the answers

What is the origin of the Supraspinatus muscle?

Fossa of the scapula Signup and view all the answers

What action does the Subscapularis muscle perform?

Medially rotates and adducts arm Signup and view all the answers

Which nerve innervates the infraspinatus muscle?

Suprascapular nerve Signup and view all the answers

What is the primary function of the latissimus dorsi muscle?

Adduction and medial rotation of the humerus Signup and view all the answers

Which nerve innervates the trapezius muscle?

Accessory Nerve Signup and view all the answers

What is the insertion point of the levator scapulae muscle?

Medial border of scapula above the spine Signup and view all the answers

Which group of muscles does the teres major belong to?

Scapulo-humeral intrinsic muscles Signup and view all the answers

Where does the rhomboid major muscle originate?

Spinous processes of T2 to T5 Signup and view all the answers

What is the main role of the rhomboid minor muscle?

Stabilize the scapula Signup and view all the answers

Which of the following muscles is involved in the medial rotation of the humerus?

Latissimus Dorsi Signup and view all the answers

What is the origin point for the latissimus dorsi muscle?

Spinous processes of the inferior 6 thoracic vertebrae Signup and view all the answers

What is the significance of the thoracodorsal nerve?

It innervates the latissimus dorsi muscle. Signup and view all the answers

Which area does the rhomboid minor insert into?

Medial end of scapular spine Signup and view all the answers

Which muscle group includes the trapezius and latissimus dorsi?

Superficial extrinsic muscles Signup and view all the answers

What is the primary action of the latissimus dorsi muscle?

Medial rotation of the humerus Signup and view all the answers

Where does the levator scapulae muscle originate?

Transverse processes of C1-C4 vertebrae Signup and view all the answers

What nerve innervates the rhomboids?

Dorsal scapular nerve Signup and view all the answers

What is the insertion point of the rhomboid major muscle?

Medial border of the scapula from the spine to the inferior angle Signup and view all the answers

What is the innervation of the deltoid muscle?

Axillary nerve Signup and view all the answers

Which muscle originates from the posterior surface of the inferior angle of the scapula?

Teres Major Signup and view all the answers

What action is primarily associated with the middle part of the deltoid muscle?

Abducts the arm Signup and view all the answers

Which muscle does not laterally rotate the arm?