olecranon
Học thuậtThân thiện
Definition
Noun: * The prominent bony projection at the upper end of the ulna (the larger of the two forearm bones), forming the point of the elbow. It fits into a corresponding depression (the olecranon fossa) in the humerus (the upper arm bone) when the arm is fully extended.
Usage
- The olecranon is the part of your elbow you can feel and see when you bend your arm.
- A direct fall onto the elbow can result in a fracture of the olecranon.
- The triceps muscle tendon attaches to the olecranon, allowing you to straighten your arm.
Advanced Usage
- Olecranon bursitis: Inflammation of the small fluid-filled sac (bursa) overlying the olecranon, often called "student's elbow" or "popeye elbow."
- Olecranon process: A synonymous term used in more technical anatomical descriptions.
- Olecranon fossa: The deep depression on the posterior side of the humerus into which the olecranon fits during arm extension.
Variants and Related Words
- Olecranal (adjective): Pertaining to the olecranon. (e.g., ).
- Elbow: The common term for the joint, of which the olecranon is the bony tip.
Synonyms
- Elbow bone (informal, descriptive)
- Point of the elbow
Related Phrases / Idioms
- To hit one's funny bone: This common sensation is actually caused by hitting the ulnar nerve as it passes near the olecranon, not the bone itself.
Noun
- process of the ulna that forms the outer bump of the elbow and fits into the fossa of the humerus when the arm is extended