MSK

Question 1

What is the nerve supply of pectoralis major and minor?

Answer 1

medial and lateral pectoral nerves

Question 2

What does the radial nerve supply?

Answer 2

extensor muscles of arm and forearm

Question 3

What 3 muscles are in the anterior/ flexor compartment of the arm?

Answer 3

biceps brachii, brachialis, coracobrachialis (BBC)

Question 4

What nerve innervates of the anterior/ flexor compartment of the arm?

Answer 4

musculocutaneous nerve

Question 5

What is the only muscle in the posterior compartment of the arm?

Answer 5

triceps brachii

Question 6

How many heads does the triceps brachii have and where do they originate/ insert?

Answer 6

3 heads
-long head originates from infraglenoid tubercle
- lateral head originates from humerus
- medial head originates from humerus
3 heads converge to form muscle which inserts into olecranon of ulna

Question 7

What are the dermatomes of the anterior abdominal wall?

Answer 7

T6-T12

Question 8

What is the dermatome of the umbilicus?

Answer 8

T10

Question 9

What is the origin of the external oblique?

Answer 9

lower ribs and thoraco-lumbar fascia

Question 10

Where does the external oblique insert?

Answer 10

into the linea alba via its aponeurosis

Question 11

What are the roots of the brachial plexus?

Answer 11

brachial plexus is formed by the anterior rami of C5-T1

Question 12

What nerves are the roots of the lumbar plexus?

Answer 12

L1-L4

Question 13

What are the branches of the lumbar plexus?

Answer 13

Iliohypogastric
Ilioinguinal
Genitofemoral
Lateral Cutaneous
Obturator
Femoral
( I hope I Get Leftovers On Friday)

Question 14

What is the function of the triceps brachii?

Answer 14

extension of arm at elbow

Question 15

What is the innervation of triceps brachii?

Answer 15

radial nerve

Question 16

What spinal segment does a tap on the triceps tendon test?

Answer 16

C7

Question 17

What 3 bones make up the shoulder?

Answer 17

scapula, humerus, clavicle

Question 18

What are the 5 muscles of the shoulder?

Answer 18

supraspinatus, infraspinatus, teres minor, subscapularis, deltoid

Question 19

Which muscles form the rotator cuff?

Answer 19

all shoulder muscles except deltoid

supraspinatus, subscapularis, infraspinatus, teres minor

Question 20

What are the 3 joints of the shoulder?

Answer 20

glenohumeral joint
sternoclavicuar
achronioclavicular

Question 21

What structures run under the flexor retinaculum?

Answer 21

8 tendons
1 artery (radial)
1 nerve (median)

Question 22

What are the muscles of the hypothenar eminence?

Answer 22

abductor digiti minimi
flexor digiti minimi
opponens digiti minimi

Question 23

What is the nerve supply to the hypothenar eminence?

Answer 23

deep branch of ulnar nerve

Question 24

What muscles are in the superficial compartment of the forearm?

Answer 24

palmaris longus
flexor carpi ulnaris
flexor carpi radialis
flexor digitorium superficialis
pronator teres

Question 25

What are the deep muscles of the forearm?

Answer 25

flexor pollicus longus flexor digitorium profundus pronator quadratum

Question 26

What is the nerve supply to the majority of the muscles of the forearm? What are the exceptions to this? What are they supplied by instead?

Answer 26

median nerve flexor carpi ulnaris medial half of flexor digitoriujm profundus both supplied by ulnar nerve

Question 27

Which muscles of the hand are supplied by the median nerve?

Answer 27

``` 2 lateral lumbricals opponens pollicis abductor pollicis flexor pollicis (Remember - LLOAF) ```

Question 28

Which muscles make up the thenar eminence?

Answer 28

flexor pollicis abductor pollicis opponens pollicis

Question 29

What nerve innervates the thenar eminence?

Answer 29

median nerve | OAF of LLOAF

Question 30

How many heads does the triceps have and what are their names?

Answer 30

3 | long, lateral and medial

Question 31

What is the nerve supply to the triceps?

Answer 31

``` radial nerve (and axillary nerve supplies long head) ```

Question 32

What action does the triceps carry out?

Answer 32

extends forearm

Question 33

Where does the triceps insert?

Answer 33

olecranon process of ulna

Question 34

What are the 5 main branches of the brachial plexus?

Answer 34

``` musculocutaneous median ulnar radial axillary ```

Question 35

What are the names of the 3 trunks of the brachial plexus and what are their roots?

Answer 35

superior (C5,C6) middle (C7) inferior (C8, T1)

Question 36

What is the innervation of the brachialis muscle?

Answer 36

musculocutaneous nerve

Question 37

What is the action of the brachialis?

Answer 37

it is the main flexor at the elbow

Question 38

What nerve innervates the coracobrachialis?

Answer 38

musculocutaneous nerve

Question 39

What is the action of the coracobrachialis?

Answer 39

flexor of arm at shoulder

Question 40

What is the main action of the biceps brachii?

Answer 40

supination of the forearm | and flexes arm at elbow and shoulder

Question 41

What is the innervation of the biceps brachii?

Answer 41

musculocutaneous nerve

Question 42

What spinal cord segment does a tap on the biceps tendon test?

Answer 42

C6