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Anatomy > Muscles of the Shoulder Complex > Flashcards

Muscles of the Shoulder Complex Flashcards

1
Q

What is the origin of the trapezius?

A

Occipital bone, nuchal ligament, and spinous processes of C7-T12.

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2
Q

What is the insertion of the trapezius?

A

Spine of scapula, acromion, and clavicle.

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3
Q

What are the actions of the trapezius?

A

Superior fibers - Scapular elevation
Middle fibers - Scapular adduction
Inferior fibers - Scapular depression
All - fibers - Upward scapular rotation

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4
Q

What innervates the trapezius?

A

Spinal accessory nerve (CN-XI).

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5
Q

What is the origin of the levator scapulae?

A

Transverse processes of upper cervical vertebrae.

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6
Q

What is the insertion of the the levator scapulae?

A

Superior angle of the scapula.

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7
Q

What are the actions of the levator scapulae?

A

Elevation and downward rotation of the scapula.

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8
Q

What innervates the levator scapulae?

A

Dorsal scapular nerve (C5).

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9
Q

What is the origin of the rhomboid major?

A

Spinous processes of T2-T5.

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10
Q

What is the origin of the rhomboid minor?

A

Spinous processes of C7-T1.

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11
Q

What is the insertion of the rhomboid major and minor?

A

Medial border of the scapula.

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12
Q

What are the actions of the rhomboid major and minor?

A

Adduction of the scapula.

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13
Q

What innervates the rhomboid major and minor?

A

Dorsal scapular nerve (C5).

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14
Q

What is the origin of the Pectoralis Minor?

A

Ribs 3-5

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15
Q

What is the insertion of the Pectoralis Minor?

A

Coracoid process of the scapula.

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16
Q

What are the actions the Pectoralis Minor?

A

Stabilizes scapula against posterior thoracic wall.

17
Q

What innervates the Pectoralis Minor?

A

Medial pectoral nerve (C8-T1).

18
Q

What is the origin of the Serratus Anterior?

A

Ribs 1-8

19
Q

What is the insertion of the Serratus Anterior?

A

Medial margin of the scapula.

20
Q

What are the actions of the Serratus Anterior?

A

Scapular abduction and stabilizer of the scapula against the thoracic wall.

21
Q

What innervates the Serratus Anterior?

A

Long thoracic nerve

22
Q

What is the origin of the Subclavius?

A

Medially at Rib 1

23
Q

What is the insertion of the Subclavius?

A

Laterally at subclavian groove

24
Q

What are the actions of the Subclavius?

A

Pulls clavicle inferiorly and anteriorly, stabilizes sternoclavicular joint, and depress tip of shoulder.

25
Q

What innervates the Subclavius?

A

Subclavius nerve

Anatomy (60 decks)

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