Functional Anatomy of the Elbow

These flashcards cover the key concepts and structures related to the functional anatomy of the elbow as discussed in the lecture.

Elbow Joint

Made up of three bones: humerus, radius, and ulna.

Radius Positioning Trick

The radius is on the thumb side; remember it as 'radio antenna with thumb'.

Types of Elbow Joints

There are three elbow joints: humeroulnar, humeroradial, and proximal radioulnar.

Valgus Forces

Resisted by the ulnar collateral ligament at the elbow.

Varus Forces

Resisted by the radial collateral ligament at the elbow.

Annular Ligament

Unique for surrounding the neck of the radius.

Interosseous Membrane Purpose

Helps distribute forces from the distal radius through the rest of the arm.

Pronation and Supination Plane

These motions occur in the transverse plane.

Elbow Flexion and Extension Plane

These motions occur in the sagittal plane.

Anterior Muscles of the Elbow

Includes Biceps brachii, Brachialis, Brachioradialis, and Pronator Teres.

Posterior Muscles of the Elbow

Includes Triceps brachii and Anconeus.

Elbow Flexion

The common motion produced by the anterior muscles of the elbow.

Elbow Extension

The common motion produced by the posterior muscles of the elbow.

Carrying Angle

The angle between the humerus and forearm in the frontal plane.

Cubitus Varus vs. Cubitus Valgus

Cubitus valgus is an angle larger than normal range; cubitus varus is smaller.

Humerus Features (Anterior View)

Includes coronoid fossa, medial epicondyle, lateral epicondyle, trochlea, capitulum, shaft.

Humerus Features (Posterior View)

Includes olecranon fossa, medial epicondyle, lateral epicondyle, trochlea, capitulum, shaft.

Radius Features (Anterior View)

Includes head, neck, radial tuberosity, styloid process, and ulnar notch.

Radius Features (Posterior View)

Includes radial tuberosity, styloid process, head, and ulnar notch.

Ulna Features (Posterior View)

Includes olecranon process, trochlear notch, coronoid process, radial notch, head, and styloid process.

Elbow Ligaments

Includes ulnar (medial) collateral ligament, radial (lateral) collateral ligament, and annular ligament.