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Human Anatomy & Kinanthropometry > Week 4 - Elbow Joint > Flashcards

Week 4 - Elbow Joint Flashcards

1
Q

Define the elbow joint

A

Hinge joint

Formed by:

  • Trochlea + capitulum of humerus
  • Trochlear notch of ulna
  • Head of radius.
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2
Q

What are the anatomical components of the elbow joint

A

Articular capsule

Ulnar collateral ligament

Radial collateral ligament

Anular ligament of the radius

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3
Q

What movements occur at the elbow joint

A

Flexion + extension

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4
Q

Describe the anterior part of the articular capsule of the elbow joint

A

From radial + coronoid fossae of humerus

To coronoid process of the ulna + the anular ligament of the radius.

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5
Q

Where does the posterior part of the articular capsule of the elbow joint extend from and to?

A

Extends from:

  • Capitulum
  • Olecranon fossa
  • Lateral epicondyle of humerus

Extends to:

  • Anular ligament of radius
  • Olecranon of ulna
  • Ulna posterior to radial notch.
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6
Q

Describe the look of the ulnar collateral ligament

A

Thick + triangular ligament

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7
Q

Describe location of the ulnar collateral ligament

A

Extends from:

  • Medial epicondyle of humerus

Extends to:

  • Coronoid process
  • Olecranon of ulna.

Part of this deepens the socket for the trochlea of the humerus.

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8
Q

Describe the look of the radial collateral ligament

A

Strong + triangular ligament

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9
Q

Describe location of the radial collateral ligament

A

Extends from the lateral epicondyle of the humerus to the anular ligament of the radius + radial notch of the ulna.

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10
Q

Anular ligament of the radius

A

Strong band encircling head of radius holding it in radial notch of the ulna.

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11
Q

What muscles of the arm FLEX the radius + ulna?

A

Biceps brachii

Brachialis muscles

Brachioradialis muscles

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12
Q

What muscles of the arm EXTEND the radius + ulna?

A

Triceps brachii

Anconeus

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13
Q

Origin for biceps brachii muscle

A

LONG HEAD originates from tubercle above glenoid cavity of scapula.

SHORT HEAD originates from coracoid process of scapula.

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14
Q

Insertion point for biceps brachii muscle

A

Radial tuberosity of radius + bicipital aponeurosis

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15
Q

What actions does the biceps brachii allow?

A

Flexion of forearm at elbow joint

Supinates forearm at radionulnar joint

Flexion of arm at shoulder joint

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16
Q

Origin for brachialis muscle

A

Distal, anterior surface of humerus.

17
Q

Insertion for brachialis muscle

A

Ulnar tuberosity + coronoid process of ulna.

18
Q

Action of brachialis muscle

A

Flexes forearm at elbow joint

19
Q

Origin for brachioradialis

A

Lateral border of distal end of humerus

20
Q

Insertion for brachioradialis

A

Superior to styloid process of radius

21
Q

Actions of brachioradialis muscle

A

Flexion of forearm at elbow joint

Supination + pronation of forearm at radioulnar joints to neutral position.

22
Q

Origin for triceps brachii

A

LONG HEAD originates from infraglenoid tubercle (projection inferior to glenoid cavity of scapula).

LATERAL HEAD originates from lateral + posterior surface of humerus.

MEDIAL HEAD originates from entire posterior surface of humerus.

23
Q

Insertion for triceps brachii

A

Olecranon of ulna

24
Q

Action of the triceps brachii

A

Extension of forearm at elbow joint

Extension of arm at shoulder joint

25
Q

Origin for anconeus

A

Lateral epicondyle of humerus.

26
Q

Insertion for anconeus

A

Olecranon + superior portion of shaft of ulna.

27
Q

Action for anconeus muscle

A

Extension of forearm at elbow joint

28
Q

Origin for pronator teres

A

Medial epicondyle of humerus + coronoid process of ulna.

29
Q

Insertion for pronator teres

A

Midlateral surface of radius

30
Q

Action for pronator teres

A

Pronation of forearm at radioulnar joints

Weakly flexes forearms at elbow joint.

31
Q

Origin for pronator quadratus

A

Distal portion of shaft of ulna

32
Q

Insertion for pronator quadratus

A

Distal portion of shaft of radius.

33
Q

Action of pronator quadratus

A

Pronation of forearm at radioulnar joints.

34
Q

Origin for supinator muscle

A

Lateral epicondyle of humerus + supinator crest.

35
Q

Insertion for supinator muscle

A

Lateral surface of proximal 1/3rd of radius.

36
Q

Action of supinator muscle

A

Supination of forearm at radioulnar joints.

Human Anatomy & Kinanthropometry (27 decks)

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