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Medicine - Lizzy > MSK > Flashcards

MSK Flashcards

1
Q

What is the nerve supply of pectoralis major and minor?

A

medial and lateral pectoral nerves

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2
Q

What does the radial nerve supply?

A

extensor muscles of arm and forearm

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3
Q

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

A

biceps brachii, brachialis, coracobrachialis (BBC)

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4
Q

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

A

musculocutaneous nerve

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5
Q

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

A

triceps brachii

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6
Q

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

A

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

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7
Q

What are the dermatomes of the anterior abdominal wall?

A

T6-T12

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8
Q

What is the dermatome of the umbilicus?

A

T10

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9
Q

What is the origin of the external oblique?

A

lower ribs and thoraco-lumbar fascia

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10
Q

Where does the external oblique insert?

A

into the linea alba via its aponeurosis

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11
Q

What are the roots of the brachial plexus?

A

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

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12
Q

What nerves are the roots of the lumbar plexus?

A

L1-L4

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13
Q

What are the branches of the lumbar plexus?

A 
Iliohypogastric
Ilioinguinal
Genitofemoral
Lateral Cutaneous
Obturator
Femoral
( I hope I Get Leftovers On Friday)
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14
Q

What is the function of the triceps brachii?

A

extension of arm at elbow

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15
Q

What is the innervation of triceps brachii?

A

radial nerve

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16
Q

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

A

C7

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17
Q

What 3 bones make up the shoulder?

A

scapula, humerus, clavicle

18
Q

What are the 5 muscles of the shoulder?

A

supraspinatus, infraspinatus, teres minor, subscapularis, deltoid

19
Q

Which muscles form the rotator cuff?

A

all shoulder muscles except deltoid

supraspinatus, subscapularis, infraspinatus, teres minor

20
Q

What are the 3 joints of the shoulder?

A

glenohumeral joint
sternoclavicuar
achronioclavicular

21
Q

What structures run under the flexor retinaculum?

A 
8 tendons
1 artery (radial)
1 nerve (median)
22
Q

What are the muscles of the hypothenar eminence?

A

abductor digiti minimi
flexor digiti minimi
opponens digiti minimi

23
Q

What is the nerve supply to the hypothenar eminence?

A

deep branch of ulnar nerve

24
Q

What muscles are in the superficial compartment of the forearm?

A 
palmaris longus
flexor carpi ulnaris
flexor carpi radialis
flexor digitorium superficialis
pronator teres
25
Q

What are the deep muscles of the forearm?

A

flexor pollicus longus
flexor digitorium profundus
pronator quadratum

26
Q

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?

A

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

27
Q

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

A 
2 lateral lumbricals 
opponens pollicis
abductor pollicis
flexor pollicis
(Remember - LLOAF)
28
Q

Which muscles make up the thenar eminence?

A

flexor pollicis
abductor pollicis
opponens pollicis

29
Q

What nerve innervates the thenar eminence?

A

median nerve

OAF of LLOAF

30
Q

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

A

3

long, lateral and medial

31
Q

What is the nerve supply to the triceps?

A 
radial nerve
(and axillary nerve supplies long head)
32
Q

What action does the triceps carry out?

A

extends forearm

33
Q

Where does the triceps insert?

A

olecranon process of ulna

34
Q

What are the 5 main branches of the brachial plexus?

A 
musculocutaneous
median
ulnar
radial
axillary
35
Q

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

A

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

36
Q

What is the innervation of the brachialis muscle?

A

musculocutaneous nerve

37
Q

What is the action of the brachialis?

A

it is the main flexor at the elbow

38
Q

What nerve innervates the coracobrachialis?

A

musculocutaneous nerve

39
Q

What is the action of the coracobrachialis?

A

flexor of arm at shoulder

40
Q

What is the main action of the biceps brachii?

A

supination of the forearm

and flexes arm at elbow and shoulder

41
Q

What is the innervation of the biceps brachii?

A

musculocutaneous nerve

42
Q

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

A

C6

Medicine - Lizzy (6 decks)

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