Superficial back muscles

Question 1

What is the origin, insertion, action and innervation of Trapezius

Answer 1

Origin: occipital protuberance, spinous processes c7-t12,

Insertion: clavicle, scapula (acromion and spine)

Action: elevate and retract the scapula

Innervation: CN11

Question 2

True or false the Latissimus Dorsi is a superior muscle of the back and a thoracoppendicular muscle

Answer 2

True

Question 3

What is the origin, insertion, action and innervation of Levator Scapulae

Answer 3

Origin: Cervical vertebrae 4 or 5

Insertion: superior angle of the scapula

Action: elevates the scapula

Innervation: Dorsal scapular nerve

Question 4

What is the origin, insertion, action and innervation of Rhomboid Major

Answer 4

Origin: Spinous process of vertebrae T2-T5

Insertion: vertebral border of the scapula below the scapular spine

Action: rowing motion (elevates and adducts scapula)

Innervation: dorsal scapular nerve

Question 5

What is the origin, insertion, action and innervation of Rhomboid Minor

Answer 5

Origin: Spinous process of vertebrae C7 and T1

Insertion: vertebral border of the scapula above the scapular spine

Action: rowing motion (elevates and adducts scapula)

Innervation: dorsal scapular nerve