MSK 1-Additional

Question 1

Which muscle laterally rotates the scapula?

Answer 1

serratus anterior

Question 2

The scapular motion occurs at the

Answer 2

scapulothoracic joint (conceptual)

Question 3

The small space for the supraspinatus beneath the acromion is called the

Answer 3

subacromial space

Question 4

What muscle elevates proximal fragment of fractured clavicle and helps protect the underlying neurovasculature damage?

Answer 4

Sternocleidomastoid Muscle (SCM)

Question 5

2 ligaments of the acromioclavicular (AC) joint

Answer 5

1. acromioclavicular ligament

2. coracoclavicular ligament

Question 6

A strong pair of ligaments that unites coracoid process and the clavicle

Answer 6

coracoclavicular ligament

Question 7

two ligaments that make up coracoclavicular ligament

Answer 7

1. trapezoid ligament

2. conoid ligament

Question 8

Positive piano sign can be observed in what degree AC injury?

Answer 8

3rd degree

Question 9

The lateral cord of brachial plexus includes

Answer 9

anterior divisions of superior and middle trunks

Question 10

The medial cord of brachial plexus includes

Answer 10

anterior division of inferior trunk

Question 11

The posterior cord of brachial plexus includes

Answer 11

posterior divisions of ALL 3 trunks

Question 12

The lateral cord of brachial plexus gives rise to what terminal branches?

Answer 12

1. musculocutaneous nerve

2. lateral root of median nerve

Question 13

The posterior cord of brachial plexus gives rise to what terminal branches?

Answer 13

1. axillary nerve

2. radial nerve

Question 14

The medial cord of brachial plexus gives rise to what terminal branches?

Answer 14

1. medial root of median nerve

2. ulnar nerve

Question 15

In addition to the 5 MAJOR branches off the Brachial Plexus, what are the smaller branches? (8 total)

Answer 15

1. Dorsal Scapular (C5)
2. Long Thoracic (C5-7)
3. Suprascapular (C5-C6)
4. Lateral Pectoral (C5-C7)
5. Medial Pectoral (C8 and T1)
6. Medial Cutaneous nerve of arm (C8 and T1)
7. Medial Cutaneous nerve of forearm (C8 and T1)
8. Subscapular Nerves
   - Upper (C5, C6)
   - Middle (C6-C8)
   - Lower(C5, C6)

Question 16

What is also known as a funny bone

Answer 16

medial epicondyle

Question 17

A deep depression which receives the olecranon process of the ulna during extension of the elbow/forearm

Answer 17

olecranon fossa

Question 18

Two heads (short and long) of biceps inserts into radius via

Answer 18

radial tuberosity

Question 19

Two heads (short and long) of biceps inserts into antebrachial fascia via

Answer 19

bicipital aponeurosis

Question 20

Musculocutaneous nerve (C5 and C6) innervates and pierces what muscle?

Answer 20

coracobrachialis muscle

Question 21

What lines the inside of the Glenohumeral Joint capsule and reflects and surrounds the tendon of the ________________?

Answer 21

Synovial Membrane; long head of biceps

Question 22

What holds long head of bicep tendon in the bicipital groove/intertubercular sulcus?

Answer 22

Transverse humeral ligament

Question 23

Dislocations at the glenohumeral joint are most common in the anterior-inferior direction and is called

Answer 23

sub-coracoid or anterior dislocations

humeral head ends up beneath the coracoid process

Question 24

The orientation of interosseous membrane assists in transferring forces from the radius to the ulna especially during a

Answer 24

FOOSH

Question 25

Dinner fork deformity is produced by

Answer 25

distal radial fracture fragment displacing dorsally (posteriorly)

Question 26

Inflammation of thumb extensor/abductor tendons is called

Answer 26

De Quervain's tenosynovitis

Question 27

Radial nerve divides into what two main branches in the forearm?

Answer 27

1. Superficial Branch | 2. Deep Branch

Question 28

What branch of radial nerve pierces through supinator muscle and continues as Posterior Interosseous Nerve (PIN) which innervates extensors of wrist/fingers?

Answer 28

Deep Branch

Question 29

What is also known as Saturday night fracture?

Answer 29

Boxer's fracture (fracture of 5th metacarpal)

Question 30

Palmar aponeurosis sends what septum to the 5th metacarpal?

Answer 30

medial septum

Question 31

Palmar aponeurosis sends what septum to the 3rd metacarpal?

Answer 31

lateral septum

Question 32

Fibrous digital sheaths are composed of what ligaments?

Answer 32

5 annular and 4 cruciform ligaments

Question 33

Trigger fingers is also known as

Answer 33

stenosing tenosynovitis

Question 34

Hypothenar compartment is innervated by

Answer 34

deep branch of ulnar nerve

Question 35

Damage to what nerve can cause ape hand due to thenar atrophy?

Answer 35

recurrent branch of median nerve

Question 36

Adductor compartment is innervated by

Answer 36

deep branch of ulnar nerve

Question 37

Lumbricals arise from

Answer 37

sides of FDP tendons

Question 38

Interosseous compartment is innervated by

Answer 38

deep branch of ulnar nerve

Question 39

Ulnar artery divides into what two terminal branches?

Answer 39

1. Superficial palmar arch | 2. Deep Palmar branch

Question 40

Superficial palmar arch gives rise to what smaller branches?

Answer 40

1. Common palmar digital arteries | 2. Proper Palmar digital arteries

Question 41

Radial artery gives rise to what two branches of the hand?

Answer 41

1. Radial indicis artery (index finger) | 2. Princeps Pollicis artery (thumb)

Question 42

Radial artery anastomoses with the deep palmar branch of ular artery to form

Answer 42

Deep Palmar Arch

Question 43

What are the two arterial arches of the hand?

Answer 43

1. Superficial Palmar Arch | 2. Deep Palmar Arch

Question 44

What is the difference between superficial palmar arch and deep palmar arch?

Answer 44

1. Superficial Palmar Arch is formed mainly by the ULNAR artery. 2. Deep Palmar Arch is formed mainly by the RADIAL artery

Question 45

Transverse plane (cervical facet joint) orientation allows what movement?

Answer 45

Multiaxial movement

Question 46

Coronal/frontal plane (thoracic facet joint) orientation allows what movement?

Answer 46

Rotational movement

Question 47

Sagittal plane (lumbar facet joint) orientation allows what movement?

Answer 47

flexion and extension

Question 48

Interconnecting vertebral venous plexuses (VVP) are directly connected to pelvic vein system and azygos system (which run along the thracic column). This connection allows easy

Answer 48

metastasis to the vertebral column causing metastatic bone cancer

Question 49

95% of LUMBAR disc herniations occur

Answer 49

at L4/L5 and at L5/S1

Question 50

A posterolateral disc herniation between L4/L5 affects what nerve

Answer 50

L5 (it's the next spinal nerve that gets affected)

Question 51

A posterolateral disc herniation between L5/S1 affects what nerve

Answer 51

S1 (it's the next spinal nerve that gets affected)

Question 52

What is the branch of axillary nerve that supplies sensation to the lateral shoulder skin area; its damage can cause loss of sensation in lateral aspect of shoulder/deltoid when surgical neck fracture occurs

Answer 52

superior lateral cutaneous nerve

Question 53

What nerve pierces through the coracobrachialis?

Answer 53

the musculocutaneous nerve of lateral cord