Anatomy of the Ulna and Muscles

This video tutorial provides a comprehensive overview of the ulna, a medial bone in the forearm. It explains how to determine the side of the ulna, describes its features including the olecranon and coronoid processes, and details the muscle and ligament attachments. The video concludes with a summary of these attachments and a prompt to subscribe for more content.

Which bone is the ulna homologous with in the lower limb?

• Patella

• Femur

• Fibula

• Tibia

What is the function of the olecranon process?

• Forms the deltoid tuberosity

• Projects upwards from the shaft

• Forms the lower part of the trochlear notch

• Articulates with the radius

Which border of the ulna is sharp and crest-like?

• Anterior border

• Posterior border

• Interosseous border

• Medial border

Where is the triceps brachii inserted on the ulna?

• Coronoid process

• Olecranon process

• Radial notch

• Styloid process

Which muscle originates from the supinator crest?

• Pronator teres

• Supinator

• Anconeus

• Brachialis

What is the role of the interosseous membrane?

• Connects the ulna to the humerus

• Separates the ulna from the wrist joint

• Attaches to the interosseous border

• Forms the trochlear notch

Which muscle originates from the anterior surface of the ulna?

• Flexor digitorum profundus

• Extensor carpi ulnaris

• Abductor pollicis longus

• Anconeus

What is the function of the styloid process of the ulna?

• Articulates with the humerus

• Provides attachment for the ulnar collateral ligament

• Forms the radial notch

• Supports the olecranon process

Which muscle is associated with the posterior surface of the ulna?

• Extensor pollicis longus

• Brachialis

• Flexor carpi ulnaris

• Pronator quadratus

What is the significance of the ulnar tuberosity?

• It provides insertion for the brachialis

• It supports the styloid process

• It forms the trochlear notch

• It articulates with the radius