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Gross Anatomy > Scapular, Deltoid and Pectoral Regions > Flashcards

Scapular, Deltoid and Pectoral Regions Flashcards

1
Q

Muscles that move the scapular (5)

A

1) trapezius
2) Rhomboids
3) levator scapulae
4) pectoralis minor
5) serratus anterior
6) dorsal scapular muscle group: supraspinatus, infraspinatus, teres major and minor

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2
Q

Subscapularis

origin

A

Subscapular fossa (scapula)

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3
Q

Subscapularis

insertion

A

Lesser tubercle of Humerus

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4
Q

Subscapularis

innervation

A

upper and lower subscapular nn.

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5
Q

subscapularis

action

A

Medial rotation of arm

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6
Q

Supraspinatus

origin

A

Supraspinous fossa

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7
Q

Supraspinatus

insertion

A

greater tubercle of humerus

superior facet

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8
Q

Supraspinatus

innervation

A

suprascapular n. (C5-C6)

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9
Q

Supraspinatus

action

A

Abduction (0-15 degrees)

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10
Q

Only bony attachment of UL to trunk

A

Clavicle

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11
Q

Should dislocation occurs at which of the 3 articulations of the shoulder joint

A

Acromioclavicular joint

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12
Q

Dorsal scapular muscles

A
  1. Supraspinatus
  2. Infraspinatus
  3. teres major
  4. teres minor
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13
Q

Infraspinatus

origin

A

Infraspinous fossa

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14
Q

Infraspinatus

insertion

A

Greater tubercle of humerus (middle facet)

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15
Q

Infraspinatus

innervation

A

suprascapular n.

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16
Q

Infraspinatus

action

A

lateral rotation of the arm

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17
Q

Teres minor

origin

A

upper lateral border of scapula

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18
Q

Teres minor

insertion

A

Greater tubercle of humerus

inferior facet

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19
Q

Teres minor

action

A

Lateral rotation of the arm

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20
Q

Teres minor

innervation

A

Axillary N. (C5-C6)

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21
Q

Teres major

origin

A

Lower lateral border of scapula

22
Q

Teres major

insertion

A

Crest of lesser tubercle of humerus

23
Q

Teres major

innervaiton

A

Lower subscapular n.

24
Q

Teres major

action

A

Medial rotation, adduction, and extension of arem

25
Q

Deltoid

origin

A
  1. Later margin of scapular spine (post. fibers)
  2. Acromion (middle fibers)
  3. Clavicle (ant. fibers)
26
Q

Deltoid

insertion

A

Deltoid tuberosity of humerus

27
Q

Deltoid

innervation

A

Axillary N. (C5-C6)

28
Q

Deltiod

action

A
  1. Abduction: 15-100 degrees
  2. ant. fibers- medial rotation and flex. of arm
  3. post. fibers- lat. rotation and ext. of arm
29
Q

What passes through the suprascapular foramen?

army over navy

A

The suprascapular n. (which innervates the supraspinatus and infraspinatus muscles.

30
Q

What passes above the suprascapular ligament?

army over navy

A

the suprascapular a.

31
Q

Boarders of quadrangular space?

A

Superior border- teres minor
inferior border- tere major
lateral border- humerus
medial border- long head of triceps

32
Q

Contents of the quadrangular space?

A
  1. Axillar n (innver. deltoid and teres minor)

2. post. circumflex humeral a.

33
Q

Borders of the triangular space?

A

superior border- teres minor
inferior border- teres major
lateral border- long head of triceps

34
Q

Contents of triangular space?

A

circumflex scapular a.

35
Q

Muscles of the rotator cuff?

SITS

A
  1. Supraspinatus
  2. Infraspinatus
  3. Teres minor
  4. Subscapularis

fxn= hold head of humerus in place to prevent disslocation

36
Q

Pectoralis Major

Origin

A
  1. Clavicle
  2. Sternum
  3. Ribs 1-6
37
Q

Pectoralis Major

insertion

A

Crest of greater tubercle of humerus

38
Q

Pectoralis Major

innervation

A

Medial and lateral pectoral nn.

39
Q

Pectofalis Major

action

A
  1. Medial rotation
  2. Adduction
  3. Flexion of Arm
40
Q

Pectoralis Minor

origin

A

Ribs 3-5

41
Q

Pectoralis Minor

insertion

A

Coracoid process of scapula

42
Q

Pectoralis Minor

innervation

A

medial pectoral n.

43
Q

Pectoralis Minor

action

A

protraction of scapula

44
Q

Serratus anterior

origin

A

Ribs 1-9

45
Q

Serratus anterior

insertion

A

medial border of scapula, costal surface

46
Q

Serratus anterior

innervation

A

Long thoracic N. (C5-C7)

47
Q

Serratus anterior

action

A
  • Protraction and sup. rot. of lateral angle of scapula

- holds scapula against dorsal trunk

48
Q

Subclavius

origin

A

1st rib

49
Q

Subclavius

insertion

A

goove on middle 1/3 of claivicle

50
Q

Subclavius

innervation

A

N. to the subclavius

51
Q

Subclavius

action

A
  • pulls tip of shoulder down
  • pulls clavicle medially to stabillize the sternoclavicular joint
  • serves to cushion neurovascular lying deep to clavicel.
52
Q

Innvervation and blood supply to the serratus anterior muscle are provided by which nerve and artery?

A

Long thoracic nerve and lateral thoracic artery

Gross Anatomy (3 decks)

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