UE Shoulder Girdle

Question 1

Trapezius II (descending)

Answer 1

Origin: lower cervical C4-C7 SP
Insertion: acromion
Action: up rotate scapula, elevate scapula, add/retract scapula, ipsilateral lat flex cervical spine, contralateral flex spine
Innervation: cranial nerve XI, and ventral rami C2-C4

Question 2

Trapezius I (descending)

Answer 2

Origin: occipital bone and upper cervical C1-C3 spinous processes (SP)
Insertion: lateral clavicle
Action: upward rotate scapula, elevate scapula, adduct (add)/retract scapula, ipsilaterally and laterally flex cervical spine, contralaterally rotate cervical spine
Innervation: cranial nerve XI (accessory) and ventral rami C2-C4

Question 3

Trapezius III (transverse)

Answer 3

Origin: Upper thoracic T1-T4 SP
Insertion: Scapular spine
Action: Add/Retract scapula
Innervation: Cranial nerve XI and Ventral rami C2-C4

Question 4

Trapezius IV (ascending)

Answer 4

Origin: Lower thoracic T5-T12 SP
Insertion: Medial scapular spine
Action: Up rotate scapula, depress scapula, add/retract scapula
Innervation: Cranial nerve XI, ventral rami C2-C4

Question 5

Rhomboid Major

Answer 5

Origin: upper thoracic T1-T4 SP
Insertion: medial border scapula below scapular spine
Action: add/retract scapula, elevate scapula, downwardly (down) rotate scapula
Innervation: Dorsal scapular nerve

Question 6

Rhomboid minor

Answer 6

Origin: lower cervical C6-C7 SP
Insertion: medial border scapula over scapular spine
Action: Add/retract scapula, elevate scapula, down rotate scapula
Innervation: Dorsal scapular nerve

Question 7

Levator scapulae

Answer 7

Origin: upper cervical C1-C4 transverse processes (TP)
Insertion: Superior angle scapula
Action: elevate scapula, down rotate scapula
Innervation: Dorsal scapular nerve

Question 8

Sternocleidomastoid

Answer 8

Origin: manubrium and medial clavicle
Insertion: mastoid process and superior nuchal line
Action: Ipsilat. lat flex cervical spine, contralat. rot. cervical spine, extension (bilateral)
Innervation: Cranial nerve XI, and ventral rami C1-C2

Question 9

Subclavius

Answer 9

Origin: Superior surface 1st rib
Insertion: Inferior, lateral surface of clavicle
Action: Stabilize clavicle
Innervation: Nerve to subclavius

Question 10

Pectoralis minor

Answer 10

Origin: anterior surface ribs 3-5
Insertion: coracoid process scapula
Action: anterior (ant) tip scapula, abduct/protract scap, downward rotate scap, depress
Innervation: medial and lateral pectoral nerves

Question 11

Serratus Anterior (superior)

Answer 11

Origin: lateral surface ribs 1-5
Insertion: medial border of scapula, superior angle
Action: abduct/protract scap, downward rot. scap, stabilize medial border, elevate
Innervation: long thoracic nerve

Question 12

Serratus Anterior (inferior)

Answer 12

Origin: lat surface ribs 5-9
Insertion: Medial border scapula, inferior angle
Action: abd/protract scap, upward rot., stabilize medial border, depress
Innervation: Long thoracic nerve