Ulna

Os ulnae

The ulna is the longer forearm bone with a prominent olecranon process at its proximal end. The trochlear notch articulates with the trochlea of the humerus. The coronoid process prevents posterior dislocation. The head and styloid process are at the distal end.

種類 Bone
器官系 Skeletal
身体部位 Forearm
親構造 forelimb zeugopod bone
ラテン語名 Os ulnae
FMA ID 23466

機能

The medial bone of the forearm forming the primary articulation at the elbow. Provides stability during forearm rotation and serves as the axis around which the radius rotates.

臨床的意義

Olecranon fractures result from direct falls on the elbow. Monteggia fractures involve ulnar shaft fracture with radial head dislocation. The ulnar nerve passes posterior to the medial epicondyle, vulnerable to compression.

よくある質問

What is the Ulna?
The ulna is the longer forearm bone with a prominent olecranon process at its proximal end. The trochlear notch articulates with the trochlea of the humerus. The coronoid process prevents posterior dislocation. The head and styloid process are at the distal end.
What is the function of the Ulna?
The medial bone of the forearm forming the primary articulation at the elbow. Provides stability during forearm rotation and serves as the axis around which the radius rotates.
What body system is the Ulna part of?
The Ulna is part of the Skeletal.
What conditions affect the Ulna?
Olecranon fractures result from direct falls on the elbow. Monteggia fractures involve ulnar shaft fracture with radial head dislocation. The ulnar nerve passes posterior to the medial epicondyle, vulnerable to compression.
Where is the Ulna located?
The Ulna is located in the Forearm region of the body.

関連構造

fin bone bone of fin bone element bone bone fossa concavities subdivision of skeletal system skeletal system part skeletal joint articular joint radial element actinost Atlas (C1) Atlas skeleton set of all bones

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