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ANAT 314 Material > Pectoral Girdle > Flashcards

Pectoral Girdle Flashcards

1
Q

The scapula articulates with which bones?

A

Clavicle and humerus

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2
Q

Which bony projections of the scapula serve as attachment sites for shoulder muscles?

A

Spine, coracoid process, acromion and supra-/infraglenoid tubercles

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3
Q

What type of joint is the acromioclavicular joint?

A

Synovial

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4
Q

What motion does the acromioclavicular joint allow?

A

Gliding

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5
Q

What are the important ligaments of the acromioclavicular joint?

A

Coracoacromial ligament, acromioclavicular ligament and coracoclavicular ligament

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6
Q

What type of joint and geometry is the sternoclavicular joint?

A

Synovial; saddle

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7
Q

What movement does the sternoclavicular joint allow?

A

Protraction/retraction, elevation/depression

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8
Q

Why is the scapulothoracic joint not an anatomical joint?

A

There is no synovial capsule, but it permits motion of bones without features of synovial joints

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9
Q

What are the movements of the scapulothoracic joint?

A

Elevation/depression, protraction/retraction, upward and downward rotation

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10
Q

What are the anterior muscles of the scapulothoracic joint?

A

Subclavius and pectoralis minor

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11
Q

What innervates the subclavius?

A

Subclavian nerve

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12
Q

What are the actions of the subclavius?

A

Depresses clavicle

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13
Q

What innervates the pectoralis minor?

A

Medial pectoral nerve

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14
Q

What are the actions of the pectoralis minor?

A

Depresses, protracts and rotates scapula inferiorly

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15
Q

What are the lateral muscles of the scapulothoracic joint?

A

Serratus anterior

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16
Q

What innervates serratus anterior?

A

Long thoracic nerve

17
Q

What is the primary action of the serratus anterior?

A

Primary protractor of the scapula

18
Q

What are the posterior muscles of the pectoral girdle?

A

Trapezius, levator scapulae, rhomboids and latissimus dorsi

19
Q

What are the actions of the trapezius?

A

Upper 1/3: elevation
Middle 1/3: retraction
Lower 1/3: depression

20
Q

What innervates the trapezius?

A

Accessory spinal nerve

21
Q

What is the primary action of the levator scapulae?

A

Elevation, some retraction

22
Q

What innervates the levator scapulae?

A

C3-C5

23
Q

What are the actions of the rhomboids?

A

Retraction and some elevation

24
Q

What innervates the rhomboids?

A

Dorsal scapular

25
Q

What is the primary function of the latissimus dorsi?

A

Downward rotation

26
Q

What innervates the latissimus dorsi?

A

Thoracodorsal nerve

ANAT 314 Material (22 decks)

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