Shoulder

Question 1

What does the pectoral girdle consist of?

Answer 1

the clavicle and scapula, and the cervicoaxillary canal (conduit)

Question 2

Movement of the clavicle (degrees)

Answer 2

incline 40˚, depress 10˚, rotate on long axis, protract 30˚, retract 25˚

Question 3

Movement of scapula (degrees)

Answer 3

elevation 40˚, depression 10˚, retract 20˚, protract 30˚, rotate up 20˚, rotate down 60˚, 1/3 of arm abduction

Question 4

Coracoclavicular ligament consists of what two ligaments?

Answer 4

conoid ligament (medial) and trapezoid ligament (lateral)

Question 5

Subscapularis

Answer 5

Attachment- subscapular fossa to lesser tubercle, tendon separated by subscapular bursa
Innervation- upper and lower subscapular nerves
Blood- subscapular artery

Question 6

Subscapularis action

Answer 6

medial rotation, joint stabilization

Question 7

Serratus anterior

Answer 7

Attachment- ribs 1-8 to medial border of scapula
Innervation- long thoracic nerve
Blood- lateral thoracic artery

Question 8

Serattus anterior action

Answer 8

primary protractor

Question 9

Subclavius

Answer 9

Attachment- 1st rib to costoclavicular ligament
Innervation- nerve to subclavius
Blood- clavicular branch of thoracoacromial artery

Question 10

Subclavius action

Answer 10

depresses clavicle, stability

Question 11

Pectoralis minor

Answer 11

Attachment- ribs 3-5 to costoclavicular ligament
Innervation- medial pectoral nerve
Blood- pectoral branch of thoracoacromial artery

Question 12

Pectoralis minor action

Answer 12

depress, protract, downward rotation of scapula

Question 13

Pectoralis major attachments

Answer 13

clavicular head- proximal clavicle
sternal head- lateral margin of first 7 ribs
abdominal head inserts on intertubercular groove

Question 14

Pectoralis major innervation and blood supply

Answer 14

Innervation- medial and lateral pectoral nerves

Blood- pectoral branch of thoracoacromial artery

Question 15

Pectoralis major action

Answer 15

medial rotation, protraction, elevation, adduction of humerus, delineates infraclavicular fossa

Question 16

Teres major

Answer 16

Attachment- posterior inferior angle of scapula to medial lip of intertubercular groove, tendon posterior to latissimus dorsi with bursa between
Innervation- lower subscapular nerve
Blood- circumflex scapular artery

Question 17

Teres major action

Answer 17

extends, adducts, medially rotates arm (SAME AS LATISSIMUS DORSI)

Question 18

Supraspinatus

Answer 18

Attachment- supraspinous fossa to greater tubercle of humerus
Innervation- suprascapular nerve
Blood- suprascapular artery

Question 19

Supraspinatus action

Answer 19

initiates abduction of arm (0-15˚), some medial rotation, stabilize joint

Question 20

Infraspinatus

Answer 20

Attachment- infraspinous fossa to middle facet of greater tubercle of humerus
Innervation- suprascapular nerve
Blood- suprascapular artery

Question 21

Infraspinatus action

Answer 21

lateral rotates humerus, stabilizes shoulder joint

Question 22

Teres minor

Answer 22

Attachment- lateral border of scapula to inferior facet on greater tubercle of humerus
Innervation- axillary nerves
Blood- circumflex scapular artery

Question 23

Teres minor action

Answer 23

lateral rotates humerus, stabilizes shoulder joint

Question 24

Deltoid

Answer 24

Attachment- lateral 1/3 of clavicle and spine of scapula to deltoid tuberosity of humerus
Innervation- axillary nerve
Blood- deltoid branch of thoracoacromial artery and posterior

Question 25

Deltoid action

Answer 25

abducts arm from 15 to 120˚, anterior part of muscle flexes and medially rotates while posterior part extends and laterally rotates

Question 26

What type of joint is the sternoclavicular joint?

Answer 26

synovial

Question 27

What are the bones involved with the sternoclavicular joint?

Answer 27

clavicular notch and sternal facet

Question 28

Ligaments involved in the sternoclavicular joint?

Answer 28

anterior and posterior sternoclavicular ligaments, interclavicular ligament, and costoclavicular ligament

Question 29

Movement of the sternoclavicular joint

Answer 29

``` clavicle -incline 40˚ -depress 10˚ rotate on long axis -protract 30˚ -retract 25˚ ```

Question 30

Acromioclavicular joint is what type of joint?

Answer 30

synovial

Question 31

Ligament involved in acromioclavicular joint?

Answer 31

acromioclavicular ligament

Question 32

What type of joint is the scapulothoracic?

Answer 32

muscular

Question 33

What are the two bursae of the scapulothoracic joint?

Answer 33

subscapular bursa- between subscapularis and serratus anterior scapulothoracic bursa-between serratus anterior and external intercostals

Question 34

Muscles involved with the scapulothoracic joint?

Answer 34

subscapularis (superficial), serratus anterior (middle), and external intercostals (deep)

Question 35

Movement of the scapulothoracic joint?

Answer 35

- elevation 40˚ - depression 10˚ - retract 20˚ - protract 30˚ - rotate up 20˚ - rotate down 60˚ - does 1/3 of arm abduction