Definition

1. Noun:
   • The inner and longer bone of the human forearm: The ulna is one of the two long bones located in the forearm, on the side opposite the thumb (the medial side when in the anatomical position). It runs parallel to the radius and is primarily responsible for forming the elbow joint.

Usage

• The ulna is a key skeletal structure. It is typically used in anatomical, medical, and biological contexts.
• It is often mentioned in relation to the radius, the other forearm bone, and to joints like the elbow and wrist.

Examples

• Noun:
  • A fracture of the ulna can cause significant pain and limit arm movement.
  • The olecranon process is the prominent part of the ulna that forms the point of the elbow.
  • In the skeleton, the ulna is positioned on the little finger side of the forearm.

Advanced Usage

• "Proximal ulna": Refers to the upper end of the ulna, which is involved in the elbow joint.
  • The surgeon repaired the fracture in the proximal ulna.
• "Distal ulna": Refers to the lower end of the ulna, near the wrist.
  • Arthritis commonly affects the distal ulna.

Variants and Related Words

• Ulnar (adj): Pertaining to the ulna.
  • Ulnar nerve entrapment causes tingling in the ring and little fingers.
• Ulnae (n): The plural form of ulna (less common than "ulnas").
  • The study compared the ulnae of different primate species.

Synonyms

• Forearm bone: A general descriptive term.
• Cubitus: An older or less common anatomical term for the ulna.

Related Phrases

• Ulnar styloid process: A bony projection at the distal end of the ulna.
  • The ligament attaches to the ulnar styloid process.
• Ulnar deviation: A medical term for a hand movement or position bending toward the ulna side.
  • Rheumatoid arthritis can cause ulnar deviation of the fingers.

Noun

1. the inner and longer of the two bones of the human forearm