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U9 Anatomy > Shoulder and Axilla > Flashcards

Shoulder and Axilla Flashcards

1
Q

What muscles attach to the clavicle?

A

trapezius, deltoid, subclavius, pectoralis major, sternocleidomastoid and sternohyoid muscles

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2
Q

What does the pectoral girdle consist of?

A

collection of joints connects the scapula, clavicle and humerus

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3
Q

What does the pectoral girdle consist of?

A

collection of joints connects the scapula, clavicle and humerus

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4
Q

What is the only bony link btwn the upper limb and the axial skeleton?

A

Sternoclavicular joint

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5
Q

What is the only bony link btwn the upper limb and the axial skeleton?

A

Sternoclavicular joint

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6
Q

What is the innervation for the sternoclavicular joint?

A

supraclavicular nerve

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7
Q

What is the blood supply for the sternoclavicular joint?

A

Suprascapular and internal thoracic arteries

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8
Q

What is the blood supply for the sternoclavicular joint?

A

Suprascapular and internal thoracic arteries

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9
Q

What is the innervation for the acromioclavicular joint?

A

suprascapular and lateral pectoral

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10
Q

What is the blood supply for the acromioclavicular joint?

A

Suprascapular and thoracoacromial

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11
Q

What is the blood supply for the acromioclavicular joint?

A

Suprascapular and thoracoacromial

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12
Q

What is the blood supply for the acromioclavicular joint?

A

Suprascapular and thoracoacromial

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13
Q

What are the 3 openings in the glenohumeral joint?

A

Between tubercles
Below coracoid process
Between joint and infraspinatus tendon

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14
Q

What are the 3 openings in the glenohumeral joint?

A

Between tubercles
Below coracoid process
Between joint and infraspinatus tendon

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15
Q

What is the innervation for the glenohumeral joint?

A

Suprascapular
Axillary
Lateral pectoral
Posterior cord

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16
Q

What is the blood supply for the glenohumeral joint?

A

Anterior & posterior humeral circumflex

Suprascapular

17
Q

What is passively stabilized by the glenohumeral joint?

A

Trapezius
Deltoid
Ligaments

18
Q

What is actively stabilized by the glenohumeral joint?

A

Rotator cuff muscles

19
Q

What do Extrinsic muscles do?

A

connect the upper extremity to the axial skeleton–can either stabilize or actively move the scapula

20
Q

What is the primary action of the Levator scapula muscle?

A

elevate the scapula with some downward rotation

21
Q

What are the actions of the Trapezius muscle?

A

retract and upwardly rotate the scapula–acts as a postural muscle

22
Q

What are the 3 portions of the trapezius that can act independently?

A

Upper trapezius– can elevate, retreat and upwardly rotate the scapula by pulling the acromion

Lower trapezius– pulls downward and medially on the root of the spine of the scapula–depression, retraction and upward rotation of the scapula

Middle fibers of trapezius– retractors of the scapula

23
Q

What is the primary action of the Rhomboid Major and Minor?

A

pull the inferior angle and medial border of the scapula in an upward a medial direction

24
Q

What is the primary action of the Serratus Anterior?

A

Inferior angle of the scapula is moved in a lateral or outward direction–causing glenoid cavity and acromion to rotate in an upward direction

Upwardly rotates and protracts the scapula

25
Q

What is the primary action of the Pectoralis minor?

A

Protraction and downward rotation of the scapula

26
Q

What is unique about the pectoralis major muscle?

A

the one extrinsic shoulder muscle that does not attach to the scapula– instead it attaches to the lateral lip of the inter tubercular grove of the humerus

27
Q

What are the 2 components and the pectoralis major muscle?

A

Clavicular/upper head– flexes the humerus on the scapula

Sternocostal head/ lower– adducts and inwardly rotates the humerus on the scapula

28
Q

What is the combined action the the pectoralis major?

A

to flex, adduct and inwardly rotate the humerus

29
Q

What is the primary action of the Latissimus dorsi?

A

acts to pull the humerus posteriorly and medially acting to extend, adduct and inwardly rotate the humerus on the scapula

30
Q

What is the role of the intrinsic shoulder muscles?

A

attach the scapula to the humerus

31
Q

What is the primary function of the Deltoid muscle?

A

abduct the humerus on the scapula

32
Q

What are the 3 components of the deltoid muscle?

A

Anterior–flexes and inwardly rotates the humerus
Posterior– extends and outwardly rotates the humerus
Middle– abduct the humerus

33
Q

What is the primary action of the trees major?

A

pulls the humerus posteriorly and towards the midline–extend, adduct and inwardly rotate the humerus

34
Q

What are the 4 series of muscles that arise from the scapula and insert into the greater and lesser tubercles of the humerus?

A

Supraspinatus
Infraspinatus
Teres Minor
Subscapularis

35
Q

What do the Trapezius and the Rhomboids do together?

A

act to retract and elevate the scapula

36
Q

What do the Serratus anterior and the pectoralis minor do together?

A

protract the scapula

37
Q

What do the trapezius and serratus anterior do together?

A

strong upward rotators of the scapula

U9 Anatomy (1 decks)

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