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

SCAPULA Posterior Anterior Posterior

LANDMARKS Radius Ulna 1. Head 3. Radial tuberosity Styloid process 1. Olecranon process 2. Trochlear notch 3. Coronoid process Styloid process

1. Head 3. Radial tuberosity

1. Olecranon process 2. 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? Posterior Anterior Humerus What would be the location of a muscle that does elbow flexion? Ulna Fingers

ACTIONS Pronation Supination

ACTIONS

ACTIONS Where is the radius after pronation? Where would a muscle need to be located in order to cause pronation? Lateral Medial Supination Pronation Palm Up Palm Down

ACTIONS Where is the radius after supination? Lateral Medial Where is the radius after supination? Where would a muscle need to be located in order to cause supination? Supination Pronation Palm Up Palm Down

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

What positions are her right elbow and forearm in? What positions are her left elbow and forearm in?