Radius and Ulna

The video tutorial, led by Dr. Morton, provides an in-depth exploration of the radius and ulna bones, which are the principal bones of the forearm. It covers their articulations with the humerus and wrist, and details the primary bony landmarks of each bone. The radius is identified as the lateral bone, with landmarks such as the head, neck, radial tuberosity, and styloid process. The ulna, the medial bone, features landmarks like the olecranon process, coronoid process, and trochlear notch. The tutorial emphasizes the importance of these landmarks for understanding forearm anatomy and function, and concludes with a review and self-assessment section.

Which bone is primarily responsible for articulation with the wrist?

• Humerus

• Carpals

• Radius

• Ulna

What is the function of the radial tuberosity?

• Attaches to the brachioradialis muscle

• Forms a pivot joint with the ulna

• Serves as the insertion for the biceps brachii muscle

• Articulates with the humerus

What is the name of the ligament that forms a ring around the head of the radius?

• Styloid ligament

• Collateral ligament

• Interosseous ligament

• Annular ligament

Which process on the ulna serves as an attachment for the triceps brachii?

• Olecranon process

• Radial tuberosity

• Coronoid process

• Styloid process

What is the function of the trochlear notch?

• Articulates with the trochlea of the humerus

• Forms a pivot joint with the radius

• Articulates with the capitulum of the humerus

• Serves as an insertion for the brachialis muscle

What is the name of the distal rounded portion of the ulna?

• Radial head

• Coronoid process

• Olecranon process

• Ulnar head

Which process on the ulna is similar in appearance to the tip of a pen?

• Radial tuberosity

• Styloid process

• Olecranon process

• Coronoid process