Radius und Ulna

This tutorial covers the anatomy of the forearm, focusing on the radius and ulna bones. It explains the anatomical position, details the features and articulations of each bone, and discusses common fracture types and their clinical implications. The tutorial aims to provide a comprehensive understanding of forearm anatomy and its relevance in medical contexts.

Which bone is more commonly fractured in the forearm?

• Radius

• Ulna

• Humerus

• Scapula

What is the function of the annular radial ligament?

• Connects the ulna to the carpal bones

• Reinforces the proximal radio ulnar joint

• Separates the anterior and lateral surfaces of the radius

• Attaches the biceps brachii muscle

Which part of the radius serves as an attachment for the biceps brachii muscle?

• Collum radii

• Styloid process

• Caput radii

• Radial tuberosity

What is the primary articulation of the ulna at its proximal end?

• With the trochlea humeri

• With the radius

• With the carpal bones

• With the scapula

What structure allows the ulna to rotate widely?

• Olecranon

• Radial tuberosity

• Joint disc

• Styloid process

Which fracture is characterized by a posterior dislocation of the distal radius?

• Smith fracture

• Colles fracture

• Monteggia fracture

• Galeazzi fracture

What is a Galeazzi fracture?

• A fracture of the ulna with proximal dislocation

• A fracture of the radius with distal dislocation

• A fracture of the humerus

• A fracture of the scapula

Which ligament extends from the medial humeric epicondyle to the medial ulna?

• Interosseous membrane

• Collateral radial ligament

• Collateral ulnar cubiti ligament

• Annular radial ligament

What is the function of the interosseous membrane in the forearm?

• Connects the radius to the carpal bones

• Attaches the brachialis muscle

• Separates the anterior and posterior surfaces of the ulna

• Connects the radius and ulna

What is the role of the styloid process of the radius?

• Forms part of the elbow joint

• Connects to the ulna

• Serves as an attachment for the brachioradialis muscle

• Articulates with the humerus