Arm Information Flashcards
3 Bones of the Elbow complex
- Humerus
- Radius
- Ulna
What are the 3 ligaments of the elbow complex?
- Radial (Lateral) Collateral Ligament
- Ulnar (Medial) Collateral Ligament
- Annular Ligament
What are the 2 joints of the elbow complex?
Radioulnar Joint and Humeroulnar Joint
What are the movements that happen at each of the two joints of the elbow complex?
Supination and Pronation at the Radioulnar Joint
Flexion and Extension at the Humeroulnar Joint
Which is higher the trochlea or capitulum?
The capitulum on the lateral side
What is the tissue membrane between the radius and ulna?
Interosseous membrane
What does the ulnar collateral ligament connect?
The humerus to the ulna on the medial side
What does the radial collateral ligament connect?
The humerus to the annular ligament on the lateral side where the capitulum of the humerus articulates with the radius
What does the annular ligament do?
It straps the radius against the ulna
When it comes to the radius and the ulna what rotates around what?
Radius pivots around ulna
Valgus vs. Varus Forces
In a varus alignment, the distal segment deviates medially with respect to the proximal segment
In a valgus alignment, the distal segment deviates laterally with respect to the proximal segment.
Cubitus Valgus in Males = __ degrees
Cubitis Valgus in Females = __ degrees
10
13
Adecreased carrying angle, also known as a “Gunstock Deformity” is called what?
Cubital varus
What is cubital varus usually due to?
An improperly reduced supracondylar fracture or epiphyseal abnormality during growth
What is nursemaids elbow?
Pulling on the head of the radius that results in it moving inferiorly from the annular ligament
