Shoulder Girdle Muscles

Question 1

What elevates the shoulder girdle

Answer 1

Levator scapula, trapezius (upper)

Question 2

What protracts the shoulder girdle

Answer 2

Pec minor, serratus anterior

Question 3

What depresses the shoulder girdle

Answer 3

Subclavius, trapezius (lower)

Question 4

What retracts the shoulder girdle

Answer 4

The rhomboids, trapezius (mid)

Question 5

What medially rotates the shoulder girdle

Answer 5

Serratus anterior, trapezius (upper and lower fibres)

Question 6

What laterally rotates the shoulder girdle

Answer 6

Pec minor, levator scapula, the rhomboids

Question 7

What are the origins, insertions and nerve supply of trapezius

Answer 7

Origins: superior Nuchal line, ligament nuchae, Occipital protuberance of occipital bone, spinous processes C7- T12, supraspinous ligament
Insertions: 1/3 of acromion
Nerve supply: motor accessor (XI) cranial nerve sensory

Question 8

Origins, insertions, and nerve supply of levator scapula

Answer 8

Origins: transverse processes C1-T12
Insertions: medial border of scapula
Nerve supply: dorsal scapula nerve

Question 9

What are the origins, insertions and nerve supply of the rhomboids

Answer 9

Origins- C7- T1 spinous processes and supraspinous ligament
Insertions- medial border inferior to scapula spine
Nerve supply- dorsal scapula nerve

Question 10

What are the origins, insertions and nerve supply of serratus anterior

Answer 10

Origins: outer surface of ribs 8 and 9
Insertions: costal surface medial border of scapula
Nerve supply: long thoracic nerve

Question 11

What are the origins, insertions and nerve supply of pec minor

Answer 11

Origins: anterior chest wall of ribs 3 and 4 and their costal cartilages
Insertions: coracoid process of scapula
Nerve supply: median pectoral nerve

Question 11

What are the origins, insertions and nerve supply of subclavius

Answer 11

Origins: costochondral junction of 1st rib
Insertions: inferior aspect of clavicle
Nerve supply: subclavian nerve