Shoulder - muscles (elevation and depression)

Question 1

Name the 3 shoulder elevator muscles and identify where they are located on the human body (if unable check on Complete Anatomy)

Answer 1

Descending part of trapezius
Transverse part of trapezius
Levator scapulae

Question 2

What is the origin, insertion and innervation of the descending part of trapezius?

Answer 2

 Origin – External occipital protuberance and superior nuchal line of occipital boke, nuchal ligament, spinous process of C7 vertebra
 Insertion – Posterior aspect of lateral one third of clavicle, acromion of scapula
 Innervation – Accessory nerve, anterior rami of 3rd and 4th cervical nerves

Question 3

What is the origin, insertion and innervation of the transverse part of trapezius?

Answer 3

 Origin – Spinous process of C7-T4 vertebrae
 Insertion – Acromion of scapula, lateral end of spine of scapula
 Innervation – Accessory nerve, anterior rami of 3rd and 4th cervical nerves

Question 4

What is the origin, insertion and innervation of the levator scapulae?

Answer 4

o Origin – Transverse processes of C1-C2 vertebrae, posterior tubercles of transverse processes of C3-C4 vertebrae
o Insertion – Superior angle of scapula, medial border of scapula superior to spine of scapula
o Innervation – Anterior rami of 3rd and 4th cervical nerves, dorsal scapular nerve (C5)

Question 5

Name the 3 shoulder depressor muscles and identify where they are located on the human body (if unable check on Complete Anatomy)

Answer 5

Ascending part of trapezius
Transverse part of trapezius
Pectoralis minor
(accessory actions of pectoralis major and latissimus dorsi)

Question 6

What is the origin, insertion and innervation of the ascending part of trapezius?

Answer 6

 Origin – Spinous processes of T5-T12 vertebrae
 Insertion – Medial end of spine of scapula
 Innervation – Accessory nerve, anterior rami of 3rd and 4th cervical nerves

Question 7

What is the origin, insertion and innervation of the transverse part of trapezius?

Answer 7

 Origin – Spinous process of C7-T4 vertebrae
 Insertion – Acromion of scapula, lateral end of spine of scapula
 Innervation – Accessory nerve, anterior rami of 3rd and 4th cervical nerves

Question 8

What is the origin, insertion and innervation of the pectoralis minor?

Answer 8

o Origin – Anterior ends of 3rd-5th ribs
o Insertion – Coracoid process of scapula
o Innervation – Medial and lateral pectoral nerves (C5-T1)