Anatomy, Block 1: Arm And Shoulder Girdle

Front 1

The anterior and posterior compartments of the arm are separated by what?

Back 1

the intermuscular septa

Front 2

The coracobrachialis is (distal/proximal) to the brachialis muscle.

Back 2

proximal

Front 3

The coracobrachialis, brachialis and biceps brachii are all innervated by what nerve?

Back 3

musculocutaneous nerve

Front 4

What major artery is found nestled in the coracobrachialis, brachialis and biceps brachii area?

Back 4

brachial artery

Front 5

What major nerve is found nestled in the coracobrachialis, brachialis and biceps brachii area?

Back 5

median nerve

Front 6

What major nerve innervates the triceps brachii?

Back 6

the radial nerve

Front 7

The extensor compartment contains what major artery that runs in the _________ of the humerus along with the radial nerve?

Back 7

the profunda brachii artery runs in the radial groove of the humerus with the radial nerve

Front 8

What is the path of the subclavian artery?

Back 8

axillary artery > brachial artery > divides into the ulnar and radial artery

Front 9

Where does the brachial artery divide into the radial and ulnar arteries?

Back 9

at the elbow

Front 10

Perforating veins carry blood from _________________.

Back 10

superficial to deep veins

Front 11

What does the triangular interval of arm's posterior compartment house?

Back 11

-radial nerve
-profunda brachii artery

Front 12

Deep veins are usually found accompanying...

Back 12

arteries

Front 13

What are the three main superficial veins of the arm?

Back 13

-cephalic
-basilic
-median cubital

Front 14

A fracture of the humerus at the surgical neck damages the...

Back 14

axillary nerve

Front 15

A fracture of the shaft of the humerus at the spiral groove damages the...

Back 15

radial nerve

Front 16

What is the only point of bony union between the axial and appendicular skeleton?

Back 16

sternoclavicular joint

Front 17

What are the 3 points of articulation of the SC joint?

Back 17

costal cartilage of first rib (costoclavicular ligament), medial border of clavicle, manubrium

Front 18

The synovial cavity of the SC joint is divided into

Back 18

two compartments by an articular disc

Front 19

What are the 4 ligaments of the SC joint?

Back 19

-costoclavicular ligament between medial end of clavicle and 1st rib
-interclavicular ligament between the 2 clavicles
-anterior sternoclavicular ligament
-posterior sternoclavicular ligament

CIAPS (costoclavicular, interclavicular, anterior/posterior sternoclaviclar)

Front 20

A sternoclavicular dislocation is very rare, but if it happens it will most likely occur as a(n) _________________ (anterior/posterior) dislocation.

Back 20

anterior

Front 21

If you have a posterior sternoclavicular dislocation, what complications may arise?

Back 21

-tracheal rupture
-pneumothorax
-laceration of superior vena cava, subclavian artery or vein

Front 22

The acromioclavicular joint occurs between the...

Back 22

acromion and the clavicle

Front 23

The acromioclavicular joint is (completely/incompletely) divided into...

Back 23

incompletely into two joint cavities by an articular disc

Front 24

What are the ligaments of the AC joint?

Back 24

-acromioclavicular ligaments
-coracoclavicular ligaments: conoid ligament and trapezoid ligament

Front 25

Shoulder separation or dislocation may be due to a rupture of the ________________

Back 25

coracoclavicular ligament

Front 26

What type of joint is the glenohumeral joint?

Back 26

synovial, ball and socket

Front 27

The glenoid cavity of the scapula is deepened by the....

Back 27

glenoid labrum, a fibrocartilaginous rim encircling the glenoid cavity

Front 28

The synovial membrane of the glenohumeral joint forms a sheath around the ______________ and communicates anteriorly with the _________. It does not communicate superiorly with the ______________.

Back 28

tendon of the long head of the biceps brachii

subscapular bursa

subacromial bursa

Front 29

The subacromial bursa and the synovial membrane are ______________ in relation to one another.

Back 29

completely separate

Front 30

Another name for the shoulder joint ligaments is the...

Back 30

"capsule"

Front 31

What 3 ligamentous reinforcements comprise the shoulder joint?

Back 31

-coracohumeral ligament superiorly
-glenohumeral ligament anteriorly
-tranverse humeral ligament across the intertubercular groove of the humerus

Front 32

The coracohumeral ligament is subdivided into the

Back 32

superior coracohumeral ligament
middle coracohumeral ligament
inferior coracohumeral ligament

Front 33

The shoulder capsule is weakest...

Back 33

inferiorly

Front 34

What prevents superior dislocation of the shoulder?

Back 34

the coracoacromial arch (coracoid process and acromial process connected by the coracoacromial ligament)

Front 35

What is the scapulohumeral rhythm?

Back 35

In abduction, the majority of the motion is due to glenohumeral motion but around 33% of the motion is due to scapular motion (upward and lateral rotation of scapula). 2 degrees of glenohumeral rotation results in 1 degree of scapular rotation. In other words, 67% of abduction is due to glenohumeral motion and 33% is due to scapular motion. Put another way, in 180 degrees of abduction, 120 degrees is due to glenohumeral motion and 60 degrees is due to scapular motion.