G4_Scapula_EXAM1

Question 1

The _______Ligament closes the ___________ to forma fossa in the superior part of the scapula where the Suprascapular artery and nerve go over and under to form the army over navy.

Answer 1

Superior transverse scapular ligament

Suprascapular notch

Question 2

How can you differentiate the different ends of the clavicle?

Answer 2

Sternal end is small

Acromial end is BROAD

Question 3

What are the FOUR joints/articulations in the scapular region?

Answer 3

1. Glenohumoral joint
2. Acromioclavicular joint
3. Sternoclavicular joint
4. SCAPULOTHORACIC JOINT

Question 4

What muscles cross the Scapulothoracic joint?

Answer 4

Trapezius and Latissimus Dorsi

Question 5

How do you know if a muscle acts on a joint?

Answer 5

A muscle cannot act on a joint that it doesn’t cross

but WILL act on any joint that it does cross

Question 6

What vertebral levels of the Rhomboids?

Answer 6

C7 to T5

Question 7

What muscle can downward rotate and elevate the scapula? What other muscle can downward rotate scapula?

Answer 7

Levator scapulae

Rhomboids

Question 8

What happens if the Long Thoracic Nerve is damaged?

Where does this motor innervation occur? Why is it special?

Answer 8

WINGING (serratus anterior affected)

Motor innervation for Serratus anterior is Superficial. most nerve innervations are deep

Question 9

What are the borders of the Quadrangular space? What Comes through it? What clinical concern?

Answer 9

Long Head of Triceps b. goes over teres major, under teres minor, and the humerus
- AXILLARY NERVE & PCHa. (post.circ.humor.art)

-Surgical neck fracture possible PCHA lesion= hemorrhage

Question 10

What happens if AXILLARY nerve is damaged?

Answer 10

Deltoid can’t ABduct the arm

TERES Minor can’t medially rotate or adduct

Question 11

Deltoid origin? 3 parts? Actions? Innervation?

Answer 11

• Origin for deltoid is same as trapezius insertion SAC(Spine of scapula, acromion, clavicle)
  
  • 3 parts
    ○ Anterior- flexion
    ○ Middle-ABductor
    Posterior- extensor

Innervated by AXILLARY NERVE

Question 12

Where does INFRASPINATUS attach? What else attaches there?

Answer 12

Greater tubercle of humerus

Teres Minor

Question 13

What 3 muscles Medially rotates the arm? Where do these muscles INSERT?

Answer 13

LESSER TUBERCLE- Subscapularis

INTERTUBERCULAR SULCUS- Teresa Major, Latissimus Dorsi

Question 14

What innervates the teres major? Where does it insert? what muscle does it share this insertion with?

Action?

Answer 14

• Lower subscapular nerve
• Intertubercular sulcus
• Latissimus dorsi also inserts here
• Originates from lower medial border of scapula

teres minor:lateral rotates arm/adducts weak
teres major:extend arm from flexed position, adducts, medially rotates arm at shoulder

Question 15

Triangular space borders? contents?

Answer 15

Teres major/minor/long head of triceps

-Circumflex scapular artery

Question 16

What arteries and veins make up the ARMY over NAVY?

What is the ligament that separates the two?

Answer 16

SUPRASCAPULAR Artery
SUPRASCAPULAR Nerve
Superior Transverse scapular ligament

Question 17

THYROCERVICAL TRUNK
Where does it come from?
What are the Two Branches and what do they become?

Answer 17

• Thyrocervical derived from subclavian artery
  1. TRANSVERSE CERVICAL ARTERY
• • Superficial branch of transverse cervical artery
    - – parallels CN XI Accessory nerve
• • Deep (DORSAL SCAPULAR ARTERY)

2. SUPRASCAPULAR ARTERY
   - – Supplies Supraspinatus & infraspinatus

Question 18

Where do the suprascapular veins empty into?

Answer 18

External and jugular veins

- THERE IS NO THYROCERVIAL VEINS that follow the THYROCERVICAL ARTERY

Question 19

Is there a thyrocervical vein? Is there a thyrocervical artery?

Answer 19

NO THYROCERVICAL VEIN!

Yes there is a thyrocervical artery

Question 20

What supplies blood to trapezius? levator scapulae? Rhomboids? latissimus dorsi?

Answer 20

The transverse cervical artery supplies blood to trapezius. Levator scapulae and the rhomboids receive blood from the dorsal scapular artery. Latissimus dorsi receives blood from the thoracodorsal artery.

Question 21

What 3 muscles insert on Greater tubercle? Action?

Answer 21

Lateral rotates arm

Supraspinatus, Infraspinatus (suprascapular nerve), Teresa Minor (Axillary nerve)

Question 22

What muscle on the lesser tubercle? Action? Nerve?

Answer 22

subscapularis- med rotates/adducts arm

Subscapular nav

Question 23

Two muscles that insert on Mastoid process?

Answer 23

Splenius Capitis/ longissimus

Question 24

5 muscles that insert on the scapula

Answer 24

Traps, Rhomboid, levator scapula, surratus anterior

Question 25

What is the joint called with the scapula and ribs?

Answer 25

scapulothoracic joint