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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
Deltoid | origin
1. Later margin of scapular spine (post. fibers) 2. Acromion (middle fibers) 3. Clavicle (ant. fibers)
26
Deltoid | insertion
Deltoid tuberosity of humerus
27
Deltoid | innervation
Axillary N. (C5-C6)
28
Deltiod | action
1. Abduction: 15-100 degrees 2. ant. fibers- medial rotation and flex. of arm 3. post. fibers- lat. rotation and ext. of arm
29
What passes through the suprascapular foramen? | army over navy
The suprascapular n. (which innervates the supraspinatus and infraspinatus muscles.
30
What passes above the suprascapular ligament? | army over navy
the suprascapular a.
31
Boarders of quadrangular space?
Superior border- teres minor inferior border- tere major lateral border- humerus medial border- long head of triceps
32
Contents of the quadrangular space?
1. Axillar n (innver. deltoid and teres minor) | 2. post. circumflex humeral a.
33
Borders of the triangular space?
superior border- teres minor inferior border- teres major lateral border- long head of triceps
34
Contents of triangular space?
circumflex scapular a.
35
Muscles of the rotator cuff? | SITS
1. Supraspinatus 2. Infraspinatus 3. Teres minor 4. Subscapularis fxn= hold head of humerus in place to prevent disslocation
36
Pectoralis Major | Origin
1. Clavicle 2. Sternum 3. Ribs 1-6
37
Pectoralis Major | insertion
Crest of greater tubercle of humerus
38
Pectoralis Major | innervation
Medial and lateral pectoral nn.
39
Pectofalis Major | action
1. Medial rotation 2. Adduction 3. Flexion of Arm
40
Pectoralis Minor | origin
Ribs 3-5
41
Pectoralis Minor | insertion
Coracoid process of scapula
42
Pectoralis Minor | innervation
medial pectoral n.
43
Pectoralis Minor | action
protraction of scapula
44
Serratus anterior | origin
Ribs 1-9
45
Serratus anterior | insertion
medial border of scapula, costal surface
46
Serratus anterior | innervation
Long thoracic N. (C5-C7)
47
Serratus anterior | action
- Protraction and sup. rot. of lateral angle of scapula | - holds scapula against dorsal trunk
48
Subclavius | origin
1st rib
49
Subclavius | insertion
goove on middle 1/3 of claivicle
50
Subclavius | innervation
N. to the subclavius
51
Subclavius | action
- pulls tip of shoulder down - pulls clavicle medially to stabillize the sternoclavicular joint - serves to cushion neurovascular lying deep to clavicel.
52
Innvervation and blood supply to the serratus anterior muscle are provided by which nerve and artery?
Long thoracic nerve and lateral thoracic artery

Gross Anatomy (3 decks)

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