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aanatomy > Upper limb 2 > Flashcards

Upper limb 2 Flashcards

1
Q

3 muscles of anterior/flexor compartment of arm

A

brachialis

biceps brachii

coracobrachialis

(BBC)

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2
Q

Biceps brachii heads

A

2 : long & short

Long= lateral

Short= medial

Arise from scapula:

long head-> supraglenoid tubercle

short head-> coracoid process

Both heads unite at distal 1/3 of upper arm and form tendon to insert into radial tuberosity

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3
Q

What joints does biceps brachii act on?

A

Shoulder

Elbow

Radio-ulnar

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4
Q

Which head of biceps arise from coracoid process along with coracobrachialis?

A

Short

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5
Q

Which part of the scaplua does the long head of biceps arise from and what does it run in

A

Supraglenoid tubercle

runs in bicipital groove of humerus

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6
Q

Where does the tendon of biceps attach distally

(biceps tendon= union of long and short heads)

A

Radial tuberosity

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7
Q

Action of biceps on glenohumeral joint and elbow joint

A

Flexion

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8
Q

Biceps action on superior radio-ulnar joint

A

Supinaton

Flexion

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9
Q

Nerve supply to biceps

A

Musculocutaneous nerve

(lateral cord -> C5-7)

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10
Q

Action of coracobrachialis on glenhumeral joint

A

Flexion

Adduction

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11
Q

Nerve supply to coracobrachialis

A

Musculocutaneous

(Lateral cord -> C5-7)

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12
Q

Brachialis origin and insertion

A

Shaft of humerus -> ulnar tuberosity

(ulnar tubrosity is in the picture)

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13
Q

Coracobrachialis origin and insertion

A

Coracoid process -> humeral shaft (medial)

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14
Q

Brachialis action on elbow joint

A

Flexion

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15
Q

Nerve supply to brachialis

A

Musculocutaneous

(lateral cord -> C5-7)

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16
Q

How does musculocutaneous nerve enter arm?

A

Perforate coracobrachialis

Descend between biceps and brachialis

Then gives off a Lateral Cutanoeous Nerve branch

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17
Q

Musculocutaneous nerve roots

A

C5-7

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18
Q

Why is nerve called musculocutaneous?

A

Innervates anterior muscles of arm

Cutansoueus sensation to lateral aspect of forearm

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19
Q

Does musculocutaneous nerve supply any muscles in forearm or hand?

A

No fucking way

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20
Q

Knife in axilla damages what nerve

A

Muscluocutaneous nerve damage causing:

Paralysis of BBC muscles loss & sensation on lateral aspect of arm

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21
Q

Deep artery of arm

A

Profundal brachii artery

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22
Q

Median nerve pathway

A
  1. Descends down: lateral side of axillary artery -> lateral side of brachial artery (upper part)
  2. Crosses over the medial side of brachial artrery
  3. Enters the cubital fossa

(does not branch in the axilla or arm)

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23
Q

Does median nerve supply any muscles in arm?

A

No fucking way

24
Q

How does ulnar nerve enter posterior compartment?

(top right of picture)

A

Via the intermuscular septum

Then runs along medial head of triceps and medial epicondyle

(intermuscular septum= boundry between anterior and posterior compartment)

25
Q

Does ulnar nerve innervate any muscles in arm?

A

Not a bloody chance

26
Q

3 common sites of humerus and the assoaited nerve injuries

A

Surgical neck -> axillary

Medial epicondyle -> ulnar

Radial groove -> radial

27
Q

What is the cubital fossa?

A

Triangular depression in front of elbow

28
Q

Pulsation medial to tendon of biceps brachii

A

Brachial artery

29
Q

Base (posterior border) of cubital fossa

A

Imaginary line between 2 epicondyles of humerus

30
Q

medial border of cubital fossa

A

Protonator teres

31
Q

lateral border of cubital fossa

A

Brachioradialis

32
Q

Muscle of posterior compartment of arm

A

Triceps

(and anconeus)

33
Q

Triceps origin and insertion

A

Origin

Infraglenoid tubercle -> long head (medial)

Humerus -> medial and lateral short heads

Insertion

Olecranon process

34
Q

Olecranon process and coronoid process are on which bone?

A

Ulna

35
Q

Main action of triceps on elbow joint

A

Extension

36
Q

Anconeus function

A

Extension

Stabilisation

37
Q

Triceps and anconeus innervation

A

Radial nerve

(posteior cord -> C5-T1)

38
Q

Radial nerve innervates

A

Extensor compartment of arm and forearm

39
Q

Radial nerve path

A

Enters arm anterior to long head of triceps

Runs with profunda brachial artery

Curves around radial groove

40
Q

Radial nerve roots

A

C5-T1

(all of the brachial plecus baby)

41
Q

Radial nerve injury sign

A

Wrist drop

42
Q

Elbow joint type

A

Synovial hinge

43
Q

Articulating parts of elbow

A

Capitulum

Tochlea

Radius

Ulna

Lateral side: capitulum -> radius

Medial side: trochlea -> ulna

44
Q

Elbow ligaments

A

Ulnar & radial collateral

45
Q

What ligament holds the head of radius?

A

Annular ligament

46
Q

Flexors of elbow joint

A

BBC muscles

47
Q

Extensors of elbow joint

A

Triceps

Anconeus

48
Q

Olecranon bursitis is AKA

A

Students elbow

49
Q

Radio-ulnar joint is a type of

A

Synovial pivot

50
Q

Supination muscles of radioulnar joint

A

Supinator

Biceps brachii (most powerful)

51
Q

Pronation muscles of radioulnar joint

A

Pronator teres (most powerful)

Pronator quadratus

52
Q

What is the main flexor of the elbow joint

A

Brachialis

53
Q

What are the 3 muscles that attach to the coracoid process

A

Short head of biceps

Coracobrachialis

Pectoralis minor

54
Q

What tendon attaches into the cubital fossa

A

Biceps brachii tendon

55
Q

What is the course of the axillary nerve

A

Posterior cord of BP

v

Posterior to axillary artery

v

Passes medially to the surgical neck of humeurs

v

Give off 3 terminal branches

56
Q
A

aanatomy (20 decks)

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