Radius and Ulna

Dr. Morton provides an in-depth tutorial on the radius and ulna bones, focusing on their anatomical features and landmarks. The radius is the lateral bone of the forearm, while the ulna is medial. Key landmarks of the radius include the head, neck, radial tuberosity, and styloid process. The ulna features the olecranon, coronoid process, and trochlear notch. The tutorial emphasizes the importance of these structures in articulation and muscle attachment, and concludes with a review and self-assessment.

Which bone primarily articulates with the humerus at the elbow joint?

• Femur

• Carpals

• Ulna

• Radius

What is the function of the radial tuberosity?

• Attaches to the brachioradialis muscle

• Serves as the insertion for the biceps brachii muscle

• Forms a pivot joint with the ulna

• Articulates with the humerus

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

• Interosseous ligament

• Annular ligament

• Collateral ligament

• Styloid ligament

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

• Coronoid process

• Olecranon process

• Radial tuberosity

• Styloid process

What is the function of the trochlear notch on the ulna?

• Articulates with the capitulum of the humerus

• Articulates with the trochlea of the humerus

• Serves as an insertion for the brachialis muscle

• Forms a pivot joint with the radius

What is the role of the ulnar head during forearm movement?

• Allows for pronation and supination

• Forms a hinge joint with the humerus

• Supports the wrist

• Attaches to the biceps brachii

Where do the ulnar collateral ligament and radial ulnar ligaments attach?

• Radial tuberosity

• Olecranon process

• Styloid process of the ulna

• Head of the radius