Upper Limb 2

Question 1

Axio-Appendicular muscles

Answer 1

extrinsic muscles attaching the upper limb to the thorax

Anterior and Posterior

Question 2

Anterior

Answer 2

Pec Major
Pec Minor
Subclavius
Serratus Anterior

Question 3

Pec Major
O
I
Innervation

Answer 3

Clavicular head = anterior medial shaft of clavicle
Sternal head = anterior surface of the sternum
Lateral lip of intertubercular groove
Innervation = medial and lateral pecoral

Question 4

Action of Pec Major

Answer 4

Adducts
Medially rotates
Flexes the humerus
Can extend the humerus from an already flexed position

Question 5

Pec Minor
O
I
Innervation

Answer 5

3rd-5th ribs
Medial border of coracoid
Medial pectoral

Question 6

Action of Pec Minor

Answer 6

Stabilize scapula

Elevates ribs as accessory muscle

Question 7

Subclavius
O
I
Innervation

Answer 7

Junction of first rib and manubrium
Inferior center of the clavicle
Nerve to the subclavius

Question 8

Action of the subclavius

Answer 8

Anchor and depress the clavicle

Question 9

Serratus Anterior
O
I
Innervation

Answer 9

Lateral parts of ribs 1-8
Medial anterior border of scapula
Long thoracic nerve

Question 10

Action of Serratus Anterior

Answer 10

Protract
Rotate
Stabilize scapula on thorax

Question 11

Posterior

Answer 11

Trapezius
Levator Scapulae
Rhomboideus Major and Minor
Latissimus Dorsi

Question 12

Trapezius
O
I
Innervation

Answer 12

Occipital bone, spinous processes of C1-T12
Lateral third of clavicle, acromion, sup border of scapular spine
Accessory (CN XI)

Question 13

Action of Trapezius

Answer 13

Elevates, retracts, rotates, and depresses the scapula

Question 14

Levator Scapulae
O
I
Innervation

Answer 14

Transverse proc of C1 - C4
Sup angle of the scap
Dorsal scap

Question 15

Action of the levator scapulae

Answer 15

elevate the scapula

Question 16

Rhomboid Major
O
I
Innervation

Answer 16

Spinous processes of T1-T4
Medial border of scapula below scapular line
Dorsal scap

Question 17

Rhomboid Minor
O
I
Innervation

Answer 17

Spinous processes C6 and C7
Medial border of scapula above scapular line
Dorsal scap

Question 18

Action of rhomboids

Answer 18

Retract and elevate scapula

Question 19

Latissimus Dorsi
O
I
Innervation

Answer 19

Spinous processes of T7-T12, thoracolumbar fascia, iliac crest
Floor of intertubercular groove
Thoracodorsal

Question 20

Action of Lat

Answer 20

Adduct
Extend
Medially rotate humerus

Question 21

Scapulohumeral Muscles

Answer 21

Intrinsic muscles connecting scapula to humerus

Question 22

Deltoid
O
I
Innervation

Answer 22

Lateral third of the clavicle, acromion, scapular spine
Deltoid tuberosity
Axillary nerve

Question 23

Deltoid Action

Answer 23

Anterior part flexes and medially rotates arm
Medial part abducts arm
Posterior part extends and laterally rotates the arm

Question 24

Teres Major
O
I
Innervation

Answer 24

Post surface of inferior angle of scapula
Medial lip of inertubercular groove
Lower subscapular

Question 25

Teres Major Action

Answer 25

Adduction | Medial rotation of arm

Question 26

Rotator Cuff

Answer 26

Supraspinatus Infraspinatus Teres Minor Subscapularis

Question 27

Supraspinatus O I Innervation

Answer 27

Supraspinous Fossa (of scapula) Greater tubercle of humerus (sup aspect) Suprascapular nerve

Question 28

Action of Supraspinatus

Answer 28

Initiate abduction | Stabilize glenohumeral joint

Question 29

Infraspinatus O I Innervation

Answer 29

Infraspinous Foss (of scapula) Greater tubercle of humerus Suprascapular nerve

Question 30

Action of infraspinatus

Answer 30

Lateral rotation | Stabilize glenohumeral joint

Question 31

Teres Minor O I Innervation

Answer 31

Lateral border of scapula Greater tubercle of humerus Axillary

Question 32

Teres Minor Action

Answer 32

Lateral rotation | Stabilize glenohumeral joint

Question 33

Subscapularis O I Innervation

Answer 33

Subscapular fossa Lesser tubercle of humerus Upper and Lower Subscapular nerves

Question 34

Subscapularis Action

Answer 34

Medial Rotation | Stabilizes glenohumeral joint

Question 35

Triangular Space Borders

Answer 35

``` Lateral = long head of triceps Superior = Teres Minor Inferior = Teres Major ```

Question 36

What does the triangular space contain>

Answer 36

Scapular circumflex artery

Question 37

Quadrangular Space Borders

Answer 37

``` Lateral = humerus Medial = long head triceps Superior = Teres Minor Inferior = Teres Major ```

Question 38

Contents of Quadrangular Space

Answer 38

Axillary nerve and posterior humeral circumflex artery

Question 39

Clinical Applications - fracture of surgical neck of humerus -->

Answer 39

Can damage contents of quadrangular space including axillary nerve and post humeral circumflex artery - Severance of axillary artery would lead to paralysis and eventually atrophy of deltoid and teres major