Questions and Answers
What is the term for the bone located on the inner side of the forearm?
Which process is known as the bony prominence of the ulna at the elbow?
What is the name of the end of the radius that articulates with the ulna?
Ulnar notch of radius
What is the name of the bone that is also referred to as the shoulder bone?
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Which tubercle is larger, the greater tubercle or the lesser tubercle?
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What structure is located between the greater and lesser tubercles of the humerus?
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Which bone in the wrist is shaped like a pea?
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The anatomical name for the bone that forms the wrist is:
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Study Notes
Ulna
- One of the two long bones in the forearm, located on the opposite side of the thumb.
- Features include the coronoid process and olecranon process, which are important for elbow joint function.
Coronoid Process
- A bony prominence on the ulna that helps articulate with the humerus at the elbow.
- Provides attachment for ligaments and muscles.
Olecranon Process
- The pointed tip of the ulna that forms the elbow's bony prominence.
- Serves as an attachment point for muscles and helps in lever action during movement.
Styloid Process
- A small, pointed projection at the distal end of the ulna and radius.
- Provides attachment for wrist ligaments.
Trochlear Notch/Semilunar Notch
- A deep concavity on the ulna allowing it to articulate with the trochlea of the humerus during flexion and extension of the elbow.
Radius
- The other long bone of the forearm, positioned on the thumb side.
- Plays a crucial role in wrist movement and forearm rotation.
Head of Radius
- A disc-shaped structure at the proximal end of the radius that allows for rotation at the elbow.
- Fits into the radial notch of the ulna, facilitating radial motion.
Radial Tuberosity
- A roughened area on the radius, located just below the head.
- Provides an attachment point for the biceps brachii muscle.
Ulnar Notch of Radius
- A concave area on the distal end of the radius where it articulates with the ulna.
- Important for stability between the two forearm bones.
Humerus
- The long bone of the upper arm, connecting the shoulder to the elbow.
- Features various landmarks important for muscle attachment and joint movement.
Greater Tubercle
- A large, lateral projection on the humerus that serves as an attachment point for rotator cuff muscles.
Lesser Tubercle
- A smaller projection on the humerus located anteriorly, also providing attachment for rotator cuff muscles.
Intertubercular Groove
- A groove between the greater and lesser tubercles on the humerus that houses the tendon of the biceps brachii.
Surgical Neck
- A common fracture site located just below the tubercles of the humerus.
- Connects the head of the humerus to the shaft.
Deltoid Tuberosity
- A raised area on the lateral side of the humerus for attachment of the deltoid muscle.
- Facilitates shoulder movement.
Capitulum
- A rounded knob on the distal humerus that articulates with the head of the radius.
- Important for elbow joint movement.
Trochlea
- A spool-shaped structure on the humerus that articulates with the ulna.
- Allows for flexion and extension at the elbow.
Medial and Lateral Epicondyles
- Projections found at the distal humerus serving as attachment points for forearm muscles.
- Medial epicondyle is larger and more prominent than the lateral epicondyle.
Coronoid Fossa
- A small depression on the anterior surface of the humerus that accommodates the coronoid process of the ulna during elbow flexion.
Olecranon Fossa
- A large depression on the posterior side of the humerus that receives the olecranon process during elbow extension.
Carpals
- The eight small bones that make up the wrist, arranged in two rows.
- Essential for wrist movement and flexibility.
Pisiform
- A small wrist bone located in the proximal row of carpals, articulating with the triquetrium.
- Known for its role in wrist stability.
Triquetrium
- A pyramid-shaped carpal bone located in the proximal row.
- Articulates with the scaphoid, lunate, and pisiform bones.
Hamate
- A carpal bone featuring a distinctive hook-like projection that serves as an attachment for ligaments.
- Plays a role in the movements of the hand.
Lunate
- A crescent-shaped carpal bone in the proximal row, articulating with the radius.
- Important for wrist joint flexibility.
Scaphoid
- The largest carpal bone in the proximal row, known for its role in wrist motion.
- Prone to fractures due to its position and blood supply.
Trapezoid
- A small carpal bone in the distal row, located between the trapezium and capitate bones.
- Supports the second metacarpal.
Trapezium
- A carpal bone that articulates with the thumb metacarpal, allowing for opposable thumb movement.
- Important for grip and hand function.
Capitate
- The largest carpal bone in the distal row, articulating with the third metacarpal.
- Central to the wrist's complex movements.
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Description
Test your knowledge of the bones in the arm and hand with this labeling quiz. Each flashcard presents a specific anatomical term related to the ulna, radius, and other structures. Perfect for anatomy students or anyone interested in human biology.
