HAE Quiz 2: Shoulder

Question 0

Appendicular Skeleton

Answer 0

upper and lower extremity including pectoral and pelvic girdles

Question 1

Axial Skeleton

Answer 1

skull, vertebral column, ribs, sternum

Question 2

Pectoral Girdle

Answer 2

shoulder- scapula and clavicle

Question 3

Scapula

Answer 3

rests posterior to rib cage

two bony processes- acromion, coracoid

glenoid cavity- hyaline lined, site of glenohumeral joint

Question 4

Synovial Joints

Answer 4

involve the articulation of two bony surfaces covered in hyaline cartilage

Question 5

Clavicle

Answer 5

S shaped

articulates with sternum proximally, scapula distally

Question 6

Humerus

Answer 6

anatomical neck- proximal
surgical neck- distal
deltoid tuberosity- most distal

greater tubercle- lateral
lesser tubercle- anterior
intertubercular groove in between

Question 7

Sternoclavicular Joint

Answer 7

only bony articulation between upper extremity and axial skeleton

Question 8

Acromioclavicular Joint (AC)

Answer 8

where clavicle articulates with scapula

synovial

Question 9

Glenohumoral Joint

Answer 9

where scapula articulates with humerus

Question 10

Glenoid Cavity

Answer 10

shoulder socket

Question 11

Glendoid Labrum

Answer 11

Fibrocartilage in glenoid cavity

Question 12

Deltoid

Answer 12

O: spine of scapula (posterior), acromion (lateral), lateral 1/3 of clavicle (anterior)
I: deltoid tuberosity of humerus
N: axillary nerve
F: abduct, flex (ant fibers), extend (post fibers) arm

Question 13

Subscapularis

Answer 13

O: anterior surface of scapula
I: lesser tubercle of humerus
N: upper and lower subscapular nerves
F: med rotation of humerus

Question 14

Rotator Cuff Muscles

Answer 14

Supraspinatus-subscapular nerve
Infraspinatous- subscapular nerve
Subscapularis
Teres Minor- axillary nerve

Question 15

Teres Minor

Answer 15

O: lateral border of scapula (upper half)
I: greater tubercle of humerus (inferior facet)
N: axillary nerve
F: laterally rotates arm

Question 16

Infraspinatus

Answer 16

O: Infraspinous fossa
I: greater tubercle of humerus (middle facet)
N: suprascapular nerve
F: laterally rotates arm

Question 17

Subscapularis

Answer 17

O: subscapular fossa
I: lesser tubercle of humerus
N: upper and lower subscapular nerves
F: adducts and medially rotates arm

Question 18

Long Head of Triceps Brachii

Answer 18

originates from infraglenoid tubercle

Question 19

Teres Major

Answer 19

O: lateral border of scapula (lower half and inferior angle)
I: anterior side of humerus (medial lip of intertubercle groove)
N: lower subscapular nerve
F: extends and medially rotates arm

Question 21

Shoulder Spaces (general)

Answer 21

blood supply and innervation to the shoulder muscles pass anterior to the shoulder joint through spaces to supply muscles located posterior to the shoulder joint.
3 spaces: the quadrangular space, the triangular space, and the triangular interval.

Question 22

Shoulder Vessels

Answer 22

quadrangle space- axillary nerve and posterior circumflex humeral vessels
triangular space- circumflex scapular artery (posteriorly)
triangular interval- radial nerve and deep artery of arm (profunda brachii)
suprascapular notch- suprascapular vessels and nerve- artery passes superficial to transverse scapular ligament, nerve passing deep

Question 23

Latissimus Dorsi

Answer 23

O: spinous processes of lower thoracic and lumbar verebrae, iliac crest, sacrum
I: intertubular groove of the humerus
N: thoracodorsal nerve
F: extends adducts and medially rotates humerus

Question 24

Serratus Anterior

Answer 24

O: Upper ribs (typically 1-8)
I: Medial border of the scapula (anterior side)
N: Long thoracic nerve
F: Protracts and laterally rotates scapula

Question 25

Pectoralis Major

Answer 25

O: Clavicular head: medial ½ of clavicle Sternocostal head: sternum and adjacent costal cartilages I: Anterior side of humerus (lateral lip of intertubercular groove) N: Medial and Lateral pectoral nerves F: Flexes, adducts and medially rotates arm

Question 26

Pectoralis Minor

Answer 26

O:Ribs 3-5 I: Coracoid process of scapula N: Medial pectoral nerve F: Depresses scapula and assists with protraction

Question 27

Deltopectoral Groove

Answer 27

clavi- deltopectoral triangle | lies between medial border of anterior deltoid and lateral edge of pectoralis major

Question 28

Cephalic Vein

Answer 28

blood returning from upper extremity to heart | lies within deltopectoral groove

Question 29

Collateral Circulation

Answer 29

arterial blood can reach it via multiple routes often has anastomoses helps prevent ischemia common around joints

Question 30

Collateral Circulation for Scapula

Answer 30

through dorsal scapular artery or through suprascapular artery to connect with circumflex scapular artery

Question 31

Quadrangular Space

Answer 31

It is bounded by: above/superior: the subscapularis and teres minor. below/inferior: the teres major medially: the long head of the triceps brachii laterally: the surgical neck of the humerus allows axillary nerve and posterior circumflex humeral vessels (artery and vein) to pass

Question 32

Triangular Space

Answer 32

It is bounded by: the teres major inferiorly the long head of the triceps laterally For the superior border subscapularis contains circumflex scapular artery

Question 33

Supraspinatus

Answer 33

O: Supraspinous fossa I: greater tubercle of humerus (superior part) N: suprascapular nerve F: abducts arm (also responsible for initiating abduction)

Question 34

Triangular Interval

Answer 34

Two of its borders are as follows: teres major - superior long head of the triceps brachii - medial lateral border- humerus contains radial nerve and deep artery of the arm (profunda brachii)

Question 35

Long Thoracic Nerve (innervates)

Answer 35

serratus anterior

Question 36

Dorsal Scapular Nerve (innervates)

Answer 36

rhomboids and some levator scapulae

Question 37

Suprascapular Nerve (innervates)

Answer 37

supraspinatus and infraspinatus

Question 38

Median Branch (innervates)

Answer 38

(C5-T1) to most of the muscles of the anterior (flexor) forearm and 5 intrinsic muscles of the hand

Question 39

Ulnar Branch (innervates)

Answer 39

(C8-T1) to 1 1/2 muscles in the anterior (flexor) forearm and all the remaining intrinsic muscles of the hand

Question 40

Radial Branch (innervates)

Answer 40

(C5-T1) to all posterior (extensor) muscles of the arm and forearm; many have significant effects in the hand

Question 41

Musculocutanous Branch (innervates)

Answer 41

(C5-C7) to the three muscles of the anterior arm