Superficial posterior axio-appendicular muscles

Question 1

What is the proximal attachment of the trapezius?

Answer 1

Medial third of superior nuchal line; external occipital protuberance; nuchal ligament; spinous processes of C7 - T12 vertebrae

Question 2

What is the distal attachment of the trapezius?

Answer 2

Lateral third of clavicle; acromion and spine of scapula

Question 3

What is the innervation of the trapezius?

Answer 3

Spinal accessory nerve and C3, C4 spinal nerves

Question 4

What is the muscle action of the trapezius?

Answer 4

Descending part elevates, ascending part depresses; and middle part retracts scapula; descending and ascending parts act together to rotate glenoid cavity superiorly

Question 5

What is the proximal attachment of the latissimus dorsi?

Answer 5

Spinous process of inferior 6 thoracic vertebrae, thoracolumbar fascia, iliac crest, and inferior 3 or 4 ribs

Question 6

What is the distal attachment of the latissimus dorsi?

Answer 6

Floor of intertubercular sulcus of humerus

Question 7

What is the innervation of latissimus dorsi?

Answer 7

Thoracodorsal nerve (C6, C7, C8)

Question 8

What is the muscle action of the latissimus dorsi?

Answer 8

Extends, adducts, and medially rotates humerus; raises body toward arms during climbing