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Fall 2014: Anatomy & Kinesiology > Week 6: Elbow and Forearm > Flashcards

Week 6: Elbow and Forearm Flashcards

1
Q

Origin (1) of Brachialis

A

Distal ½ of the anterior shaft of the humerus

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2
Q

Insertion (1) of Brachialis

A

Ulnar tuberosity

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3
Q

Innervation (1) of Brachialis

A

Musculocutaneous N. (C5-C7)

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4
Q

Action (1) of Brachialis

A

Flexion of the forearm (in pronation)

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5
Q

Origin (2) of Biceps Brachii

A

LH: supraglenoid tubercle of the scapula
SH: Coracoid process of the scapula

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6
Q

Insertion (2) of Biceps Brachii

A

Radial Tuberosity and fascia at the medial elbow

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7
Q

Innervation (1) of Biceps Brachii?

A

Musculocutaneous N. (C5-C7)

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8
Q

Action (1) of Biceps Brachii?

A

Flexion of forearm (in supination)

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9
Q

Origin (1) of Brachioradialis

- which side?

A

Lateral supracondylar ridge of the humerus

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10
Q

Insertion (1) of Brachioradialis?

A

Styloid process of the radius

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11
Q

Innervation (1) of Brachioradialis?

A

Radial N. (C5-T1)

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12
Q

Action (1) of Brachioradialis?

A

Flexion of forearm (in neutral)

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13
Q

Origin (3) of Triceps Brachii

A

Long Head: infraglenoid tubercle of the scapula
Lateral Head: posterior shaft of the humerus
Medial-deep Head:posterior shaft of the humerus

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14
Q

Insertion (1) of Triceps Brachii

A

Olecranon process of the ulna

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15
Q

Innervation (1) of Triceps Brachii?

A

Radial N. (C5-T1)

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16
Q

Action (1) of Triceps Brachii?

A

Extension of forearm

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17
Q

Origin (1) of Anconeus?

A

Lateral epicondyle of the humerus

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18
Q

Insertion (1) of Anconeus?

A

Posterior proximal ulna

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19
Q

Innervation (1) of Anconeus?

A

Radial N. (C5-T1)

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20
Q

Action (1) of Anconeus?

A

Extension of the forearm

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21
Q

Origin (2) of Supinator?

**Remember there are 2 separate parts

A

Lateral epicondyle of the humerus and proximal ulna

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22
Q

Insertion (1) of Supinator?

A

Proximal radius

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23
Q

Innervation (1) of Supinator?

A

Radial N. (C5-T1)

24
Q

Action (1) of Supinator?

A

supinate the forearm

25
Q

Origins (2) of Pronator Teres

A

Humeral head- medial epicondyle of the humerus via the common flexor tendon
Ulnar head- Coronoid process of the ulna

26
Q

Insertion (1) of Pronator Teres?

A

Lateral radius

27
Q

Innervation (1) of Pronator Teres?

A

Median N. (C5-T1)

28
Q

Action (1) of Pronator Teres?

A

Pronation of the forearm

29
Q

Origin (1) of PQ?

A

Anterior distal ulna

30
Q

Insertion (1) of PQ?

A

Anterior distal radius

31
Q

Innervation (1) of PQ?

A

Median N. (C5-T1)

32
Q

Action (1) of PQ?

A

Pronation of the forearm

33
Q

What is the closed pack position of the ulnohumeral joint?

A

full extension

34
Q

What is the resting position of the ulnohumeral joint?

A

70 degrees elbow flexion with 10 degrees supination

35
Q

What is the closed pack position of the radiohumeral joint?

A

90 degrees of flexion

5 degrees of supination

36
Q

What is the resting position of the radiohumeral joint?

A

full elbow extension with full FA supination

37
Q

What is the closed pack position of the radioulnar joint?

A

full pronation or full supination

38
Q

What is the resting position for the radioulnar joint?

A

70 degrees flexion

35 degrees supination

39
Q

What 3 things articulations occur in the ulnohumeral joint?

A
  1. trochlea (distal humerus) to trochlear notch (ulna)
  2. coronoid process (ulna) to coronoid fossa (distal humerus)
  3. olecranon process (ulna) to olecranon fossa (distal humerus)
40
Q

What articulation occurs in the radiohumeral joint?

A

capitulum (humerus) to radial head (radius)

41
Q

The ulnar collateral ligament connects what structures?

A

Ulna and humerus

Medial epicondyle to the Coronoid and Olecranon process

42
Q

The radial collateral ligament connects what structures?

A

radius and humerus

lateral epicondyle to the olecranon process

43
Q

The annular ligament connects what structures?

A

proximal radius to proximal ulna

anterior and posterior aspect of the radial notch

44
Q

Function of the radioulnar joint?

A

movement between the radius and ulna in pronation and supination

45
Q

What happens during pronation to the radius and ulna?

A

The proximal radius rotates and the distal end cross over the ulna diagonally

46
Q

Which is more powerful: supination or pronation?

A

supination

47
Q

T/F: muscles that pronate/supinate the arm insert on the ulna?

A

False, they insert on the radius

48
Q

T/F: in pronation/supination, the radius does the movement?

49
Q

What are the 3 radioulnar joint articulations?

A
  1. Proximal
  2. Middle
  3. Distal
50
Q

Which ligament surrounds the radioulnar joint and attaches it to the radial notch on the ulna?

A

Annular ligament

51
Q

What things articulate in the proximal radioulnar joint?

A

the radial head (radius) with the radial notch (ulna)

52
Q

What functions to maintain the articulation between the radius and ulna?

A

interosseous membrane

53
Q

T/F: the middle radioulnar joint is a true joint?

A

False, it does not restrict movement

54
Q

What 2 things articulate in the distal radioulnar joint?

A

the head of the ulna and distal end of the radius

55
Q

How is the distal radioulnar joint held together?

A

By a disc of fibrocartilage joining the styloid (ulna) to the ulnar notch (radius)

56
Q

Whats the most common joint classification?

A

3rd class lever

Fall 2014: Anatomy & Kinesiology (12 decks)

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