Radiale Muskeln des Unterarms

The video tutorial provides an in-depth look at the radialis musculature of the underarm, focusing on three main muscles: the brachioradialis, extensor Capri radialis longus, and extensor Capri radialis brevis. It explains their origins, attachments, and functions, emphasizing their role in forearm extension. The tutorial also covers the nerve supply to these muscles, highlighting the radial nerve's involvement. The content is structured to help learners understand the anatomical and functional aspects of these muscles, with visual aids to enhance comprehension.

What is the primary function of the radialis musculature in the underarm?

• Flexion of the fingers

• Rotation of the shoulder

• Extension of the elbow joint

• Flexion of the wrist

Where does the brachioradialis muscle originate?

• Medial epicondyle of the humerus

• Lateral epicondyle of the humerus

• Distal end of the ulna

• Proximal end of the radius

What is the attachment point of the brachioradialis muscle?

• Head of the humerus

• Styloid process of the radius

• Base of the first metacarpal

• Olecranon of the ulna

Which muscle lies beneath the brachialis and is visible in both tense and relaxed states?

• Extensor carpi radialis longus

• Brachioradialis

• Extensor carpi radialis brevis

• Flexor carpi ulnaris

What does the term 'longus' in extensor carpi radialis longus indicate?

• Its attachment point

• Its function

• Its length

• Its origin point

Where does the extensor carpi radialis brevis muscle attach?

• Base of the third metacarpal

• Base of the fourth metacarpal

• Base of the fifth metacarpal

• Base of the second metacarpal

Which nerve supplies all the muscles in the radialis group?

• Radial nerve

• Musculocutaneous nerve

• Median nerve

• Ulnar nerve