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BMS 228 - Introduction to human anatomy > Muscles (shoulder) > Flashcards

Muscles (shoulder) Flashcards

1
Q

Where does the pec major muscle insert?

A

Lateral of the bicipital groove

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2
Q

Where does the pec major originate from?

A

The clavicle
Costal cartilages
Sternum

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3
Q

What is the action of the pec major?

A

Medially rotate the arm and adduction

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4
Q

What is the innervation of the pec major?

A

Medial and lateral pectoral nerve

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5
Q

Where does the pec minor originate from?

A

Ribs 3-5

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6
Q

Where does the pec minor insert into?

A

The coracoid process of the sternum

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7
Q

What are the actions of the pec minor?

A

Pull the scapula forwards and downwards

Pull the scapula against the thoracic wall to stabilise it

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8
Q

What is the innervation of the pec minor?

A

Medial pectoral nerve

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9
Q

What is the origin of the serratus anterior?

A

Strips from ribs 1-8

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10
Q

What is the insertion of the serratus anterior?

A

Medial border of the costal surface of the scapula

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11
Q

What is the action of the serratus anterior?

A

To hold the scapula against the ribs and to rotate the scapula

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12
Q

What is the innervation of the serratus anterior?

A

Long thoratic nerve

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13
Q

What happens if the long thoratic nerve is damaged?

A

Seratus anteior is paralysed and the medial border of the scapula is no longer held against the ribs - winging of he scapula

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14
Q

What is the origin of the trapezius?

A

Skull

Spinous processes of C7-T12

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15
Q

What is the insertion of the trapezius?

A

Spine of scapula
Acromion of scapula
Clavicle

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16
Q

What is the action of the trapezius?

A

Upper fibres - lift and rotate the scapula during abduction

Middle - retract scapula

Lower - pull scapula inferiorly

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17
Q

What is the innervation of the trapezius?

A

C3 and C4

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18
Q

What are the superficial back muscles?

A

Trapezius and Lat dorsi

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19
Q

What is the main origin for the lat dorsi?

A

T6-T12

20
Q

What is the insertion of the lat dorsi?

A

Converge into tendon into the middle of the bicipital groove

21
Q

What is the action of the lat dorsi?

A

Medial rotation and adduction of the arm

22
Q

What is the innervation of the lat dorsi?

A

C6-C8

23
Q

What does the doral scapula nerve innervated?

A
  • Levitator scapulae
  • Rhomboid major
  • Rhomboid minor
24
Q

What is the insertion of the levator scapulae?

A

Medial border of scapula (above the spine)

25
Q

What is the action of the lavator scapulae?

A

Elevate the scapula

26
Q

What is the insertion of the rhomboid minor?

A

Medial border of the scapula (at the level of the spine)

27
Q

What is the action of the rhomboid minor?

A

Retract and rotate scapula

28
Q

What is the insertion of the rhomboid major?

A

Medial border of the scapula (below the spine)

29
Q

What is the action of the rhomboid major?

A

Retract and rotate scapula

30
Q

Where do the rhomboid major and minor lie in relation to each other?

A

Rhomboid minor is superior to rhomboid major

31
Q

What does the axillary nerve innervate?

A

The deltoid and teres minor

32
Q

What does the suprascapular nerve innervate?

A

Supraspinatous and infraspinatous muscles

33
Q

What innervates the teres major?

A

Lower subscpular nerve

34
Q

What innervates he subscapularis?

A

Upper and lower subscapular nerves

35
Q

What is the origin of the deltoid?

A

Clavicle
Spine of scapula
Acromion of scapula

36
Q

What is the insertion of the deltoid?

A

Deltoid tuberocity on the lateral surface of the humerus

37
Q

What is the action of the deltoid?

A

Anterior - flexion and medial rotation

Posterior - extension and lateral rotation

Middle - Major abductor of the arm

38
Q

What is the trapezium and the deltoid divided into?

A

3 areas of muscle fibres, all with different functions

39
Q

What is the insertion of the teres major muscle?

A

Medial border of the inter-tubercular groove

40
Q

What is the action of the teres major?

A

Medially rotate and adduct the arm

41
Q

What is the action of the subscapularis?

A

Medially rotate the arm

42
Q

What is the action of the teres minor and infraspinatous?

A

Laterally rotate the arm

43
Q

What is the function of the supraspinatous?

A

Abduct the arm the first 15º

44
Q

Where do the rotator cuff muscles insert?

APART FROM WHICH ROTATOR CUFF??????
Where does this insert?

A

Onto the greater tubercle of the humerus

APART FROM:
The subscapularis - inserts onto the LESSER tubercle

45
Q

What is the origin of the teres major?

A

Inferior angle of the scapula (posteriorly)

46
Q

What is the origin of the teres minor?

A

Posterior surface of the scapula (adjacent to lateral border)

BMS 228 - Introduction to human anatomy (13 decks)

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