THE ELBOW:Bones and Actions

TERMINOLOGY

Proximal and Distal Medial and Lateral Superior and Inferior Ligament and Tendon Condyle – large round projection Epicondyle – a projection located above a condyle Fossa- hollow, depression or flattened surface Tubercle - small round projection *Supination – external rotation of the radius *Pronation – internal rotation of the radius

BONES

Medial View

BONES Scapula Humerus Radius Ulna

RADIUS

ULNA

Trochlear Notch

HUMERUS

SCAPULAA

nter

ior

Pos

terio

r

Posterior

LANDMARKS

Radius 1. Head 3. Radial tuberosity Styloid process

Ulna 1. Olecranon process 2. Trochlear notch 3. Coronoid process Styloid process

1. Head

3. Radial tuberosity

1. Olecranon process2. Trochlear notch

3. Coronoid process

HUMERUS

LANDMARKS

Humerus 1. Head 3. Lesser tubercle 4. Intertubercaluar groove 5. Greater tubercle 2. Lateral epicondyle 3. Captitulum 4. Trochlea 5. Medial epicondyle 7. Olecranon fosssa

Coracoid Process

Glenoid Cavity

JOINTS Humeroulnar

the “elbow”; a hinge joint Trochlea (humerus) Trochlear notch (ulna)

Radioulnar movement of the forearm; a pivot joint Head of radius Ulna

Radiohumeral no true actions Capitulum (humerus) Head of the radius

LIGAMENTS

Ulnar Collateral Radial Collateral Annular Ligament

LIGAMENTS

ACTIONS

Elbow or Humeroulnar Joint (Movement of the Ulna) Flexion of the elbow Extension of the elbow

Forearm or Radioulnar Joint (Movement of the Radius) Supination of the forearm Pronation of the forearm

ACTIONS

Extension

ACTIONS

What would be the location of a muscle that does elbow extension?

What would be the location of a muscle that does elbow flexion? Ulna

Posterior Anterior

Hum

erus

Fingers

ACTIONS

SupinationPronation

ACTIONS

ACTIONS

Supination PronationPalm Up Palm Down

Where is the radius after pronation?

Where would a muscle need to be located in order to cause pronation?

Lateral Medial

ACTIONS

Where is the radius after supination?

Where would a muscle need to be located in order to cause supination?

Supination PronationPalm Up Palm Down

Lateral Medial

What position his right elbow in? His right forearm? His left elbow?

What position is his right forearm in? What is his name?

What position is his left elbow in?

What positions are her right elbow and forearm in?

What positions are her left elbow and forearm in?