Movement Anatomy - Class 19

Osteokinematics/Arthorkinmatics/Bones/Ligaments/Muscles

What is the Osteokinematics of the elbow?

1. Flexion

2. Extension

3. Pronation

4. Supination

What are these joints?

Humeroradial joint

Proximal radio-ulnar joint

Humero-ulnar joint

Distal radio-ulnar joint

What are these bony landmarks?

Coronoid fossa

Radial fossa

Capitulum

Trochlea

Longitudinal crest

Fovea

Annular ligament

What are these bony landmarks/view?

Lateral view

Olecranon process

Longitudinal crest

Trochlear notch

Radial notch

Coronoid process

What are these bony landmarks/view?

Posterior view

Olecranon process

Styloid process

What are these bony landmarks/view?

Anterior view

Olecranon process

Forvea

Radial notch

Trochlear notch

Coronoid process

Head

Neck

Ulnar notch

styloid process

What are these bony landmarks/view?

Anterior view:

Lateral supracondylar ridge

Lateral epicondyle

Lateral lip

Medial lip :

Medial epicondyle

Medial supracondylar ridge

Posterior view:

Trochlea

Anconeus

What are these ligaments?

Lateral collateral ligament

Articular capsule

Medial collateral ligament

Annular ligament

What are these ligaments?

Radial collateral ligament (cut)

Annular ligament

What is the Muscle/Origin/Insertion/Action/Innervation?

Muscle: Biceps Brachii - Long/short head

Origin:
  Long Head: Supraglenoid tubercle
  Short Head: Coracoid process

Insertion: Bicipital tuberosity of radius

Action: Elbow flexion, forearm supination, shoulder flexion

Innervation: Musculocutaneous n.

What is the Muscle/Origin/Insertion/Action/Innervation?

Muscle:

Origin: Anterior aspect of distal humerus

Insertion: Coronoid process of ulna

Action: Elbow flexion

Innervation: Musculocutaneous n.

What is the Muscle/Origin/Insertion/Action/Innervation?

Muscle: Brachioradialis

Origin: Lateral supracondylar ridge of humerus
 
Insertion: Near styloid process of distal radius

Action: Elbow flexion, pronation and supination from neutral

Innervation: Radial n.

What is the Muscle/Origin/Insertion/Action/Innervation?

Muscle: Triceps Long Head and Short Head

Origin:
  Long Head: Infraglenoid tubercle of   scapula
  Lateral Head: Posterior aspect of   superior humerus
  Medial Head: Posterior aspect of   superior humerus, medial to radial   groove

Insertion: Olecranon process of ulna

Action: Elbow extension and shoulder extension(long head)

Innervation: Radial n.

What is the Muscle/Origin/Insertion/Action/Innervation?

Muscle: Triceps Long Head and Short Head

Origin:
  Long Head: Infraglenoid tubercle of   scapula
  Lateral Head: Posterior aspect of   superior humerus
  Medial Head: Posterior aspect of   superior humerus, medial to radial   groove

Insertion: Olecranon process of ulna

Action: Elbow extension and shoulder extension(long head)

What is the Muscle/Origin/Insertion/Action/Innervation?

Muscle: Supinator

Origin: Lateral epicondyle of humerus and supinator crest of ulna

Insertion: Lateral surface of proximal radius

Action: Supination

Innervation: Radial n.

What is the Muscle/Origin/Insertion/Action/Innervation?

Muscle: Pronator teres

Origin:
  Humeral head: Medial epicondyle of   humerus
  Ulnar head: Just medial to tuberosity of   ulna

Insertion: Lateral surface of mid radius

Action: Forearm pronation and elbow flexion

Innervation: Median n.

What is the Muscle/Origin/Insertion/Action/Innervation?

Muscle: Pronator Quadratus

Origin: Anterior surface of distal ulna

Insertion: Anterior surface of distal radius

Action: Forearm pronation

Innervation: Median n.

Explain the arthrokinematics of the Radioulnar Joint

Open-chain (proximal bone (Radius) is moving):

Convex - Radius

Concave - Ulna

Closed-chain (Distal bone (Ulna) is moving):

Convex: Ulna

Concave: Radius

Explain the arthrokinematics of the Humeroulnar Joint

Open chain (proximal is moving)

Convex: Humerus

Concave: Ulna

Closed chain (distal bone is moving)

Convex: Humerus

Concave: Ulna