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Gross Anatomy 2 > Arm and Cubital Fossa > Flashcards

Arm and Cubital Fossa Flashcards

1
Q

What are the muscles of the arm divided into?

A

Anterior and Posterior compartments

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2
Q

What do the muscles of the anterior compartment of the arm do?

A

Flexors of arm and elbow

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3
Q

What nerve innervates the muscles of the anterior compartment of the arm?

A

Musculocutaneous

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4
Q

What muscles are situated in the anterior compartment of the arm?

A

Biceps Brachii
Brachialis
Coracobrachialis

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5
Q

What are the attachments of the biceps brachii?

A

Long head - supraglenoid tubercle of scapula
Short head - coracoid process

Insert into radial tuberosity

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6
Q

What are the actions of the biceps brachii?

A
  • Supination and flexion of elbow (when supine)
  • Long head prevents the head of the humerus moving superiorly and short head resists dislocation
  • Weak flexion of arm
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7
Q

What is the most powerful supinator of the forearm?

A

Biceps Brachii

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8
Q

What muscle is highlighted and what is its innervation?

A

Biceps Brachii

Musculocutaneous (C5-6)

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9
Q

What nerve pierces the coracobrachialis?

A

Musculocutaneous nerve

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10
Q

What are the attachments of coracobrachilais?

A

Origin- coracoid process of scapula

Insertion- medial mid-shaft of humerus

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11
Q

What are the actions of coracorachialis?

A

Flexion of arm and assists with adduction

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12
Q

What is this muscle and its innervation?

A

Coracobrachialis

Musculocutaneous nerve

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13
Q

What are the attachments of brachialis?

A

Origin - Distal half of the anterior surface of the humerus

Insertion - Ulnar tuberosity and coronoid process

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14
Q

What is the role of brachialis?

A

Flexion of elbow

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15
Q

What is the most powerful elbow flexor?

A

Brachialis

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16
Q

What is this muscle and its innervation?

A

Brachialis

Musculocutaneous (small component of lateral fibres from radial nerve)

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17
Q

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

A

Triceps Brachii

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18
Q

What is this muscle and its innervation?

A

Triceps Brachii

Radial nerve

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19
Q

What are the attachments of the triceps brachii?

A

Long head - infraglenoid tubercle of scapula
Medial head - posterior surface of shaft of humerus (inf. to radial groove)
Lateral head - humerus (sup. to radial groove)

Insertion - olecranon of ulna

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20
Q

What are the actions of triceps brachii?

A

Extension of elbow

Long had resists dislocation

21
Q

Where does the brachial artery divide into its terminal branches?

A

In or close to the cubital fossa

Divides into radial and ulnar branches

22
Q

Which artery forms a common interosseous branch?

A

Ulna

Common branch then gives off anterior and posterior interosseous branches to supply deep structures of the forearm

23
Q

What do the radial and ulnar nerves pass through to reach the forearm?

A

Radial - lateral intermuscular septum

Ulnar - medial intermuscular septum

24
Q

What is highlighted?

A

Humerus - medial epicondyle

25
Q

What is highlighted?

A

Medial epicondyle of humerus

26
Q

What is highlighted?

A

Humerus - lateral epicondyle

27
Q

What is highlighted?

A

Trochlea of humerus

28
Q

What is highlighted?

A

Humerus - Capitulum

29
Q

What is highlighted?

A

Coronoid fossa of humerus

30
Q

What is highlighted?

A

Olecranon fossa of humerus

31
Q

What are the boundaries of the cubital fossa?

A

Lateral - Brachioradialis
Medial - Pronator teres
Roof - Skin, fascia, biceptial aponeurosis
Floor - Brachialis

32
Q

What is the communication between the basilic and cephalic veins?

A

Communicate via the median cubital vein in the cubital fossa

33
Q

What does the cephalic vein drain?

A

Lateral side of the dorsum of the hand, passes along the roof of the anatomical snuffbox, then runs up lateral side of forearm to cubital fossa

34
Q

What does the basilic vein drain?

A

Medial side of the dorsum of the hand and medial forearm before reaching the cubital fossa

35
Q

What is the contents of the cubital fossa?

A

Medial to Lateral

  • Median nerve
  • bifurcation of brachial artery into ulnar and radial arteries
  • tendon of biceps
36
Q

What type of joint is the elbow?

A

Synovial hinge

37
Q

True or False?

The ulna moves during pronation

A

False!

The radial head moves around the rounded capitulum of the humerus in pronation and supination

38
Q

What facilitates the rotation of the radius around the humerus in pronation and supination?

A

Annular ligament

39
Q

What is being highlighted?

A

Annular ligament

40
Q

What prevents adduction and abduction of the elbow?

A

Medial and lateral collateral ligaments

41
Q

What is highlighted?

A

Lateral (radial) collateral ligament

42
Q

What is highlighted and what are its parts?

A

Medial (ulnar) collateral ligament

- Posterior, anterior and oblique bands

43
Q

What is highlighted?

A

Head of radius

44
Q

What is highlighted?

A

Radial tuberosity

45
Q

What is highlighted?

A

Styloid process of radius

46
Q

What is highlighted?

A

Styloid process of ulna

47
Q

What is highlighted?

A

Trochlear notch of ulna

48
Q

What is highlighted?

A

Coronoid process of ulna

Gross Anatomy 2 (8 decks)

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