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MSK TEST 1 > Week 6 > Flashcards

Week 6 Flashcards

1
Q

Brachial Plexus begins in the ? and extends into the ?

A

neck & axilla

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2
Q

what muscle does the brachial plexus pass through?

A

scalene muscles

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3
Q

numbers of the formation of plexus?

A

5-3-6-3-5, roots, trunks, divisions, cords, terminal branches

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4
Q

Mnemonic to remembering the formation of plexus

A

red trunks drive cats nuts

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5
Q

arrangement of terminal branches

A

MARMU
- musculocutaneous
- axillary
- radial
- median
- ulnar

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6
Q

Plexus: ROOTS

A

anterior branches of spinal nerves that exits the intervertebral foramen from C5-T1

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7
Q

what part of the plexus passes through the scalene muscles

A

roots

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8
Q

3 trunks are

A

superior, middle, inferior

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9
Q

superior trunk?

A

C5 and C6

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10
Q

middle trunk?

A

C7

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11
Q

inferior trunk?

A

C8 and T1

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12
Q

what do trunks turn into?

A

divisions

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13
Q

how many divisions are there?

A

6 (anterior and posterior from each trunk)

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14
Q

what does divisions pass underneath?

A

clavicle

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15
Q

how many cords are there and name them?

A

3 cords, lateral, posterior, medial cords

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16
Q

what do cords turn into?

A

terminal branches

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17
Q

how many terminal branches are there?

A

5 terminal branches

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18
Q

lateral cord turn into?

A

musculocutaneous nerve

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19
Q

posterior cord turn into?

A

axillary and radial nerves

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20
Q

lateral and medial cord turn into?

A

median nerve

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21
Q

medial cord turn into?

A

ulnar nerve

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22
Q

Trapezius

A

Origin:
- upper trap: external occipital protuberance and the medial superior nuchal line of the occipital bone, from the ligamentum nuchae, the spinous process of C7
- middle trap: SP of T1-T5
- lower trap: SP of T6-T12
Insertion: lateral 1/3 of clavicle, acromion, spine of scapula
Innervation: spinal accessory nerve (CN XI)

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23
Q

What is the origin of Trapezius?

A

Origin:
- upper trap: external occipital protuberance and the medial superior nuchal line of the occipital bone, from the ligamentum nuchae, the spinous process of C7
- middle trap: SP of T1-T5
- lower trap: SP of T6-T12

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24
Q

What is the insertion of the trapezius?

A

Insertion: lateral 1/3 of clavicle, acromion, spine of scapula

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25
what is the innervation of the trapezius?
spinal accessory nerve (CN XI)
26
what is the functions of the upper fibers of traps?
- extension and lateral flexion of head and neck - contralateral rotation of head and neck - elevation of scapula - upward rotation of scapula
27
what is the functions of the mid fibers of traps?
retraction (adduction) of scapula
28
what is the functions of the lower fibers of traps?
- depression of scapula - upward rotation of scapula
29
where are the rhomboids located relative to the traps?
right underneath
30
Rhomboids minor
origin: SP of C7 and T1 insertion: medial (vertebral) border of scapula at the root of the spine innervation: dorsal scapular nerve
31
what is the origin of rhomboids minor?
SP of C7 and T1
32
what is the insertion of rhomboids minor?
medial border of scapula at the root of the spine
33
what is the innervation of Rhomboids minor
dorsal scapular nerve
34
Rhomboids major
origins: SP of T2-T5 insertion: medial border of scapula inferior to spine innervation: dorsal scapular nerve
35
what is the origin of rhomboids major?
SP of T2-T5
36
what is the insertion of rhomboids major?
medial border of scapula inferior to spine
37
what is the innervation of rhomboids major?
dorsal scapular nerve
38
what are the functions of the rhomboid muscles?
- retraction (adduction) of scapula - elevation of scapula - downward rotation of scapula
39
Levator scapulae
origin: Transverse process of C1-C4 insertion: medial border of scapulae (above the spine of scapula) innervation: dorsal scapular nerve
40
What are the functions of levator scapulae?
- extension of neck - lateral flexion of the neck - ipsilateral rotation of neck - elevation of scapula - downward rotation of scapula
41
pectoralis minor
origin: 3rd to 5th ribs insertion: coracoid process innervation: medial pectoral nerve
42
what are the functions of the pectoralis minor
- protraction (abduction) of scapula - downward rotation of scapula - depression of scapula - elevation of ribs #3-5
43
Subclavius
origin: first rib insertion: subclavian groove of the clavicle function: depression of clavicle at the sternoclavicular and acromioclavicular joints innervation: subclavius nerve
44
serratus anterior
Origin: Upper nine ribs Insertions: Anterior surface of vertebral (medial) border of scapula Innervation: Long thoracic nerve (C5,6,7) Function: - Protraction (abduction) of scapula - Upward rotation of scapula
45
what is winged scapula?
Injury of the long thoracic nerve produces paralysis (weakness) of the serratus anterior muscle
46
pectoralis major
Origin: - Clavicular head: medial half of clavicle - Sternocostal head: sternum and costal cartialges of 1st to 7th ribs Insertion: - Lateral lip of intertubercular (bicipital) groove of the humerus Innervation: medial and lateral pectoral Function: - Flexion of arm - Adduction of arm (in the frontal plane) - Medial rotation of arm - Horizontal adduction of arm (in the transverse plane)
47
Latissimus Dorsi
Origin: 1. Spinous process T7 to L5 2. Crests of ilium and sacrum 3. Lowest four ribs (via thoracolumbar fascia) Insertion: floor of the inter-tubercular groove of the humerus Innervation: Thoracodorsal Nerve
48
What are the actions of latissimus dorsi?
- Extension of arm - Adduction of arm - Medial rotation of arm - Anterior tilt of the pelvis
49
Deltoid
Origin: 1. For anterior fibers = lateral clavicle 2. For lateral fibers = acromion 3. For Posterior fibers = spine of scapula Insertion: deltoid tuberosity of humerus Innervation: Axillary Nerve
50
what are the functions of the deltoid?
1. Flexion of shoulder joint (anterior fibers) 2. Medial rotation of shoulder joints (anterior fibers) 3. Extension of shoulder joints (posterior fibers) 4. Lateral rotation of shoulder joints (posterior fibers) 5. Abduction of shoulder joint (entire muscle)
51
subscapularis
Origin: subscapular fossa Insertion: lesser tubercle of humerus Innervation: upper and lower subscapularis nerve Function: Medial rotation of shoulder joint
52
supraspinatus
Origin: Supraspinous fossa Insertion: greater tubercle of humerus Innervation: suprascapular nerve Function: Abduction of shoulder joint
53
infraspinatus
Origin: infraspinous fossa Insertion: greater tubercle of humerus Innervation: suprascapular nerve Function: 1. Lateral rotation of shoulder joint 2. Horizontal abduction of shoulder joint
54
Teres Minor
Origin: the superior lateral border of scapula Insertion: greater tubercle of humerus Innervation: Axillary Nerve Function: Lateral Rotation of Shoulder Joint
55
Teres Major
Origin: the inferior lateral border of scapula Insertion: Medial Lip of intertubercular (bicipital) sulcus (groove) of humerus Innervation: Upper and lower subscapular Function: 1. Extension of shoulder joint 2. Adduction of shoulder joint 3. Medial rotation of shoulder joint
56
what are the rotator cuff muscles?
- Supraspinatus - Infraspinatus - Teres minor - Subscapularis
57
what are the 3 axillary spaces?
1. Quadrangular space 2. triangular space 3. triangular interval
58
quadrangular space
- Axillary Nerve - Posterior humeral circumflex artery
59
triangular space
Circumflex scapular artery
60
triangular interval
- Radial nerve - Profunda brachii Artery

MSK TEST 1 (6 decks)

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