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Pathophysiology II - MSK > Upper Extremity > Flashcards

Flashcards in Upper Extremity Deck (80)
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1

T/F: Twisting of dermatomes is reflected due to the twisting of limbs during development

True

2

Cutaneous nerves ride to the arm via what plexus?

What does this allow for?

Brachial

Most areas receive innervation from more than one nerve root

3

If a muscle INSERTS on the scapula than it ________ the scapula.

What are examples of these muscles?

Inserts = Moves

Rhomboids
Trapezius
Pectoralis Minor
Levator Scapulae

4

If a muscle ORIGINATES on the scapula than it moves the _____.

What are examples of these muscles?

Arm

Subscapularis
Supraspinatus
Infraspinatus
Teres Minor
Teres Major
Latissimus Dorsi (partial Origin on scapula)
Coracobrachialis

5

What FOUR muscles compose the rotator cuff?

SITS

Supraspinatus
Infraspinatus
Teres Minor
Subscapularis

6

All SUPERFICIAL muscles of the back originate where?

Vertebae

Trapezius (C7, T1-12)
Lat. dosri (T6-12)
Levator scapulae (C1-4)
Rhomboid Minor (C7-T1)
Rhomboid Major (T2-5)

7

What is the only SUPERFICIAL muscle of the back that inserts on the proximal humerus?

Latissimus Dorsi

8

What SUPERFICIAL muscle of the back is innervated by the accessory nerve?

Trapezius

9

What THREE SUPERFICIAL muscles of the back are innervated by the Dorsal Scapular Nerve?

Levator Scapulae
Rhomboid Minor
Rhomboid Major

10

What nerve is the Latissimus dorsi innervated by?

Thoracodorsal Nerve

11

Which THREE SUPERFICIAL muscles of the back ELEVATE and ADDUCT the scapula?

Levator Scapulae
Rhomboid Minor
Rhomboid Major

12

The latissimus dorsii ________ (flexes/extends) the arm, ________ (abducts/adducts) the arm, __________ (medially/laterally) rotates the arm

Extends

Adducts

Medially Rotates

13

The bicep muscle is innervated by which nerve?

Musculocuntaneous Nerve

14

Which muscle of the upper arm originates on the acromion + clavicle and inserts on the humerus?

This is responsible for flexion and abduction of the arm

What nerve is this muscle innervated by?

Deltoid

Innervated by the axillary nerve

15

Which tendon in the rotator cuff is most prone to injury?

Supraspinatus

16

All of the SITS muscles insert where?

Originate where?

Insertion: Humerus (Greater of Lesser Tubercle)

Originate: Scapula (Each has its own fossa, except teres minor)

17

What branches of the brachial plexus innervate the SITS muscles?

C5 and C6

18

What makes up the anterior boundary of the axilla?

Posterior?

Anterior: Pectoral Muscles

Posterior: Lat. dorsi, teres major, subscapularis

19

What makes up the medial boundary of the axilla?

Lateral?

Medial: Serratus Anterior

Lateral: Bicipital Groove of the humerus

20

Which artery travels through the axilla?

Axillary Artery

21

The brachial plexus travels between which TWO muscles of the neck?

In the chest, it will then travel deep to which muscle?

Travels deep to the Anterior scalene but superficial to the middle scalene

Travels deep to the pectoralis minor in the chest

22

The axillary artery is a continuation of what artery?

When does this officially become the axillary artery?

Subclavian Artery

Becomes the axillary artery once it travels OVER the first rib

23

The axillary artery helps determine the _______ of the brachial plexus

Cords

24

Where do the lateral and medial cords travels in relation to the axillary artery?

Posterior cords?

Lateral and Medial cords travel laterally and medially respectively

The posterior cord travels posteriorly to the axillary artery

25

After crossing the teres minor, what does the axillary artery become?

Brachial Artery

26

What are the branches of the axillary artery?

HINT: STLSAP

S --> Superior Thoracic
T --> Thoracoacromial

L --> Lateral Thoracic
S --> Subscapular

A --> Anterior Circumflex
Humeral
P --> Posterior Circumflex Humeral

27

Usually lymphatics will follow ______ (veins/arteries)

Veins

28

Are there more superficial or deep lymphatics?

Superficial

29

Lymphatics from the arm will typically drain where?

From the place, where will they drain?

Axiallary Node Collections which drain into the subclavian nodes

30

If someone undergoes an axillary node dissection, what are they prone to?

Angioedema