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03 - Kinesiology > 03-06: The Elbow Joint > Flashcards

03-06: The Elbow Joint Flashcards

1
Q

Bones of the Elbow Joint

A

Humerus, Radius, Ulna

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2
Q

Ligaments of the Elbow Joint

A

Medial Collateral Ligament, Lateral Collateral Ligament, Annular Ligament

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3
Q

Function of Medial Collateral Ligament

A

Prevents excessive valgus formation, distal end of arm moves outward

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4
Q

Function of Lateral Collateral Ligament

A

Prevents excessive varus formation

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5
Q

Function of Annular Ligament

A

Stabilizes proximal radial head so forearm can spin

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6
Q

Medial Collateral Ligament

A
  • Connects humerus to ulna

- Triangle shaped ligament (3-4 bands): Anterior, tranverse, posterior/intermediate band

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7
Q

Stability of Anterior MCL

A

Stable with elbow in full extension

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8
Q

Stability of Posterior MCL

A

Stable with elbow in 90˚ flexion

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9
Q

Stability of Intermediate/Transverse MCL

A

Always taut, acts as stabilizing valgus force

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10
Q

Lateral Collateral Ligament

A
  • Connects humerus to radius

- One band

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11
Q

Annular Ligament

A
  • Lateral aspect of ulma and radial head connects to medial ulna
  • Encompasses radial head
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12
Q

Interosseous Membrane

A
  • Connects radius to ulna

- Provides more surface area for attachment to forearm and wrist muscles

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13
Q

Joints of Elbow Joint (4)

A

Radial humeral, Ulnar humeral, Proximal radioulnar joint, Distal radioulnar joint

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14
Q

Motions of Elbow Joint (4)

A

Flexion/Extension - Elbow joint motion

Pronation/Supination - Forearm motion

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15
Q

Joint motion of proximal RU joint

A
  • Vex (Radius) on Cave (Ulna)

- Radius spinning on ulnar side (rolls anteriorly, glides posteriorly)

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16
Q

Joint motion of distal RU joint

A
  • Cave (Radius) on Vex (Ulna)

- Distal radius guides anteriorly

17
Q

Bony landmark of scapula

A

Supraglenoid tubercle, infraglenoid tuberlce, coracoid process

18
Q

Brachialis

A

O: Anterior lower 1/2 of humerus
I: Coronoid process and ulnar tuberosity of the ulna
A: Prime elbow flexor (primarily in pronated position)
N: Musculocutaneous (C5 Root)

19
Q

Brachioradialis

A

O: Supracondylar ridge of humerus
I: Styloid process of radius
A: Elbow flexion (neutral forearm), primarly in neutral position
N: Radial Nerve (C7 Root)

20
Q

Biceps Brachii

A

O: Long Head - Supraglenoid tubercle of humerus, Short Head - Coracoid process of scapula
I: Radial Tuberosity, Licertus FIbrosis (Biciptal Aponeurosis)
A: Prime forearm supination, Assists in elbow flexion, Assists in shoulder flexion
N: Musculocutaneous (C5 Root)

21
Q

Long Head of Biceps Brachii/Labrum

A

Surrounded by labrum; tendon attaches to superior aspect of labrum

22
Q

Triceps Brachii

A

O: Long Head - Infraglenoid tubercle of scapula, Lateral Head - Posterior aspect of proximal humerus lateral to radial groove, Medial Head - Posterior aspect of distal humerus medial to radial groove
I: Olecranon process of ulna
A: Primary elbow extensor, Long Head - shoulder extension, external rotation
N: Radial Nerve (C7)

23
Q

Anconeus

A

O: Lateral epicondyle of humerus
I: Posterior ulna adjacent to olecranon
A: Assists with elbow extension
N: Radial Nerve (C7)

24
Q

Pronator Teres

A

O: Medial epicondyle of the humerus and coronoid process of the ulna
I: Lateral aspect of the radius
A: Forearm pronation, Assists in elbow flexion
N: Median Nerve (C6, C7)

25
Q

Pronator Quadratus

A

O: Anterior distal 1/3 of ulna
I: Anterior distal 1/3 of radius
A: Forearm pronation
N: Median Nerve (C6, C7)

26
Q

Supinator

A

O: Lateral epicondyle of humerus and adjacent ulna
I: Anterior proximal radius
A: Forearm supination, Assist in elbow extension
N: Radial Nerve (C7)

27
Q

Muscle Actions (Flexion)

A

Biceps Brachii, Brachialis, Brachioradialis, Assist from Pronator Teres

28
Q

Muscle Actions (Extension)

A

Triceps Brachii, Assist from Anconeus

29
Q

Muscle Actions (Pronation)

A

Pronator Teres, Pronator Quadratus

30
Q

Muscle Actions (Supination)

A

Biceps Brachii, Supinator

31
Q

Innervation (Musculocutaneous)

A

Biceps brachii, Brachialis

32
Q

Innervation (Radial)

A

Brachioradialis, Triceps Brachii, Anconeus, Supinator

33
Q

Innervation (Median)

A

Pronator Teres, Pronator Quadratus

03 - Kinesiology (18 decks)

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