Extrinsic Shoulder Flashcards by Ella Knight | Brainscape

Q

What muscles make up the extrinsic shoulder?

A

Trapezius
Latissimus dorsi
Levator scapulae
Rhomboid

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Q

What is the origin of trapezius?

A

Skull
Nuchal ligament
Spinous process C7-T12

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Q

What is the insertion of trapezius?

A

Clavicle
Acromion
Scapula spine

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Q

What is the action of trapezius?

A

Upper fibres - elevate + rotate scapula

Middle fibres - retract scapula

Lower fibres - pull scapula inferiorly

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Q

What is the innervation of trapezius?

A

Accessory nerve

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Q

What is the origin of latissimus dorsi?

A

Spinous process T7-12
Illiac crest
Inferior 3 ribs

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Q

What is the insertion of latissimus dorsi?

A

Tendon -> intertubecular sulcus

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Q

What is the action of latissimus dorsi?

A

Extend arm
Adduct arm
Medial rotation

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Q

What is the innervation of latissimus dorsi?

A

Thoracodorsal nerve

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Q

What is the origin of levator scapulae?

A

Transverse process C1-4

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Q

What is the insertion of levator scapulae?

A

Medial border scapula

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Q

What is the action of levator scapulae?

A

Elevate scapula

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Q

What is the innervation of levator scapulae?

A

Dorsal scapular nerve

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Q

What are the parts rhomboid?

A

Rhomboid major

Rhomboid minor

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Q

What is the origin of rhomboid?

A

Major - spinous process T2-5

Minor - spinous process C7-T1

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Q

What is the insertion of rhomboid?

A

Medial border scapula

Q

What is the action of rhomboid?

A

Retract + rotate scapula

Q

What is the innervation of rhomboid?

A

Dorsal scapular nerve