Lab 2 Flashcards

1
Q

What is the pneumonic for the brachial plexus?

A

“Rugby teams drink cold beer” aka Roots, Trunks, Divisions, Cords, Branches

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2
Q

What is this muscle? What is the origin, insertion, innervation, blood supply, and main action?

A

Subclavius

Origin: Junction of 1st rib and costal cartilage

Insertion: Inferior surface of middle 3rd clavicle

Innervation: Subclavian nerve

Blood supply: thoracoacromial artery

Action: anchors and depresses clavicle

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3
Q

Where is the conoid tubercle?

A

Middle arrow

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4
Q

How would you determine if a clavicle is right or left?

A

When looking at the superior angle (smooth surface) the conoid tubercle should point down and posterior, whichever side the conoid tubercle is on is the side of the clavicle

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5
Q
A

teres minor, medial pectoral nerve

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6
Q

What muscle is this? List the origin, insertion, innervation, blood supply and action.

A

Pectoralis Major

Origin:

  • clavicular head: anterior surface of medial half of clavicle
  • sternocostal head: anterior surface of sternum, superior 6 costal cartilages, aponeurosis of external oblique muscles

Insertion: lateral lip of intertubercular sulcus

Innervation: lateral and medial pectoral nerves

Blood supply: branch of thoracoacromial artery

Action: adduction, medial rotation, flexion of humerus, anterior and inferior mortion of the scapula

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7
Q

Which is the brachiocephalic artery?

A

Artery before the subclavian

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8
Q
A

Sternal extremity, right

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9
Q

Where are the coracoacromial, acromioclavicular, and coracoclavicular ligaments?

A
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10
Q
A

axillary

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11
Q
A

coracoacromial ligament

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12
Q

What muscle is this? List the origin, insertion, innervation, blood supply, and actoin.

A

Rhomboid Minor

Origin: Nuchal ligament, spinous processes of C7 to T1

Insertion: Medial border of scapula

Innervation: Dorsal Scapular Nerve

Blood Supply: Dorsal Scapular Artery

Action: Retraction and rotation of scapula to depress glenoid cavity. Fixation of scapula

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13
Q

What is the (i) functional and (ii) structural classification of the glenohumeral joint?

A

(i) triaxial
(ii) ball-and-socket

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14
Q

What muscle is this? List the origin, insertion, innervation, blood supply, and action.

A

Rhomboid Major

Origin: Spinous processes of T2 to T5 vertebae

Insertion: Medial Border of Scapula

Innervation: Dorsal Scapular Nerve

Blood Supply: Dorsal Scapular Artery

Action: Retraction and rotation of scapula to depress glenoid cavity. Fixation of scapula.

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15
Q

How would you determine left and right humerus?

A

Find the medial border

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16
Q

What does the brachial plexus consist of?

A

5 roots (C5 to T1)

3 trunks (superior, middle, inferior)

6 divisions (3 anterior, 3 posterior)

3 cords (lateral, posterior, medial)

5 terminal branches (musculocutaneous, axillary, radial, median, ulnar)

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17
Q

Where is the subdeltoid bursa?

A

beside the subacromial bursa, below the deltoid

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18
Q

Where is the brachial artery?

A

3

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19
Q

Where is the subcoracoid bursa?

A

below the coracoid process

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20
Q

What is the (i) functional and (ii) structural classification of the AC joint?

A

(i) nonaxial
(i) gliding

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21
Q
A

Acromion, right

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22
Q

Which is the basilic vein?

A

17

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23
Q
A

Greater tubercle, left

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24
Q

What muscle is this? List the origin, insertion, innervation, blood supply, action.

A

Teres Major

Origin: Posterior surface of inferior angle of scapula

Insertion: medial lip of intertubercular sulcus

Innervation: lower subscapular nerve

Blood supply: branch of subscapular artery, circumflex scapular artery

Action: adduction and medial rotation of humerus

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25
Q

What muscle is this? List the origin, insertion, innervation, blood supply, and action.

A

Supraspinatus

Origin: supraspinous fossa

Insertion: superior facet of greater tubercle

Innervation: suprascapular nerve

Blood supply: suprascapular artery

Action: adduction of humerus, acts with rotator cuff

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26
Q
A

levator scapulae, posterior tubercles of transverse processes of C1-C4

27
Q

Where is the trapezoid line?

A

Line on acromial end

28
Q
A

cephalic vein

29
Q
A

upper trapezius

30
Q

Where is the coracohumeral ligament?

A

Under coracoid process

31
Q

What muscle is this? List the origin, insertion, innvervation, blood supply and action.

A

Levator Scapulae

Origin: Posterior tubercles of transverse processes of C1 to C4 vertebrae

Insertion: superior angle & medial border of scapula

Innervation: Dorsal Scapular (C5) and Cervical nerves (C3, C4)

Blood supply: Dorsal Scapular Artery

Action: Elevation of scapula, tilts glenoid cavity inferiorly via rotation of scapula, extends neck

32
Q

Which muscles act with the rotator cuff?

A

Teres minor, infraspinatus, supraspinatus, subscapularis

33
Q

What is the arrow pointing to?

A

Triangle of auscultation

34
Q

Where is the subacromial bursa?

A

below the acromion

35
Q

What muscle is this? List the origin, insertion, innervation, blood supply, and action.

A

Pectoralis minor

Origin: 3rd to 5th intercostal cartilage

Insertion: Medial border and superior surface of coracoid process of scapula

Innervation: Medial pectoral nerve

Blood Supply: Thoracoacromial artery

Action: Stabilization of scapula

36
Q

Which is the axillary artery?

A

1

37
Q

Is this a left or right clavicle? Is this superior of inferior view?

A

Right/Superior (smooth side)

38
Q

What muscle is this? List the origin, insertion, innervation, blood supply, and action.

A

Trapezius

Origin: Medial third of nuchal line, external occipital protuberance, nuchal ligament, spinous processes of C7 to T12 vertebrae

Insertion: lateral third of clavicle, acromion and spine of scapula

Inneration: Spinal accessory nerve (CN XI) and C3, C4 spinal nerves

Blood Supply: Transverse cervical and superficial cervical arteries

Action: Elevation & Rotation of glenoid cavity superiorly (upper), depression (lower), retraction of scapula (middle)

39
Q

Where is the transverse humeral ligament?

A

between the greater and lesser tubercle in the intertubercular sulcus

40
Q

What muscle is this? List the origin, insertion, innervation, blood supply, and action.

A

Deltoid

Origin: lateral third of clavicle, acromion, spine of scapula

Insertion: deltoid tuberosity of humerus

Innervation: Axillary nerve

Blood supply: thoracoaccromial artery, anterior and posterior circumflex arteries

Action: Flexion, abduction, extension, lateral rotation, medial rotation of humerus

41
Q

What muscle is this? List the origin, insertion, innervation, blood supply and action.

A

Latissimus Dorsi

Origin: spinous processes of T7 to T12, thoracoculumbar fascia, iliac crest and inferior 3 or 4 ribs

Insertion: Floor of intertubercular sulcus

Innervation: Thoracodorsal nerve

Blood supply: Thoracodorsal artery, a branch from the subscapular artery

Action: Extension, adduction, medial rotation of humerus. Raises body towards arms during climbing

42
Q

What is the (i) functional and (ii) structural classification of the SC joint?

A

(i) nonaxial
(ii) gliding

43
Q

What muscle is this? List the origin, insertion, innervation, blood supply and action.

A

Infraspinatus

Origin: infraspinous fossa

Insertion: middle facet of greater tubercle

Innervation: suprascapular nerve

Blood supply: circumflex scapular artery, suprascapular artery

Action: lateral rotation of humerus, acts with rotator cuff

44
Q

What muscle is this? List the origin, insertion, innervation, blood supply, and action.

A

Serratus Anterior

Origin: external surface of lateral parts of ribs 1 to 8

Insertion: Anterior surface of medial border of scapula

Innervation: Long thoracic nerve

Blood supply: Lateral thoracic artery, thoracodorsal artery

Action: Protraction of Scapula, Rotation of Scapula

45
Q

What muscle is this? List the origin, insertion, innervation, blood supply, and action.

A

Subscapularis

Origin: subscapular fossa

Insertion: lesser tubercle of humerus

Innervation: upper and lower subscapular nerve

Blood supply: subscapular artery

Action: medial rotation and adduction of humerus, acts with rotator cuff

46
Q

Is this a left or a right clavicle? Is this a superior view or inferior view?

A

Right / Inferior (since it’s the rough side)

47
Q
A

Subscapularis, lesser tubercle

48
Q

Which is the axillary vein?

A

18

49
Q
A

subdeltoid bursa

50
Q
A

deltoid, abducts the humerus

51
Q

Where is the acromial facet?

A

Blue on the left

52
Q

What muscle is this? List the origin, insertion, innervation, blood supply and action.

A

Teres Minor

Origin: middle part of lateral border of scapula

Insertion: inferior facet of greater tubercle

Innervation: axillary nerve

Blood supply: branch from subscapular artery, circumflex of scapular artery

Action: lateral rotation of humerus, acts with rotator cuff

53
Q

Label the parts of the brachial plexus.

A

5 Roots (C5, C6, C7, C8, T1)

3 Trunks (superior, middle, inferior)

6 Divisions (3 anterior [superior, middle, inferior], 3 posterior [lateral, posterior, medial)

3 Cords (lateral, posterior, medial)

5 Branches (*not seen here*)

54
Q

Which is the subclavian artery?

A

Red artery behind and above the clavicle

55
Q

Where are the glenohumeral ligaments?

A

Going from glenoid cavity to humerus

56
Q

Where are the acromial and sternal extremities?

A

First arrow - acromial

Third arrow - sternal

57
Q

Where is the axillary artery?

A

Red

58
Q

Label the parts of the brachial plexus below.

A

5 Roots (C5, C6, C7, C8, T1)

3 Trunks (superior, middle, inferior)

6 divisions (3 anterior, 3 posterior) *hard to picture on this model*

3 cords (lateral, posterior, medial)

5 Branches (musculocutaneous, axillary, radial, ulnar, median)

59
Q
A

teres major, branch of subscapular artery and circumflex scapular artery

60
Q

Which is the cephalic vein?

A
61
Q
A

lateral cord

62
Q
A

musculocutaneous

63
Q

What is shown in the picture below?

A

Triangular space and quadrangular space

64
Q

Which is the brachial vein?

A

Below brachial artery (#3)