Elbow Joints Flashcards

0
Q

Why are there humero-ulnar and humero-radial articulations?

A

The trochlea and capitulum of the humerus articulate with the trochlear notch of the ulna and slightly concave superior aspect of the head of the radius.

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1
Q

What type of joint is the elbow joint?

A

Hinge type of synovial joint, located 3 cm inferior to humeral epicondyles

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2
Q

Where is the radial collateral ligament?

A

extends from the lateral epicondyle of the humerus and blends distally with the anular ligament of the radius.

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3
Q

Anular ligament of the radius

A

encircles and holds the head of the radius in the radial notch of the ulna forming the proximal radio-ulnar joint and permitting pronation and supination of the forearm.

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4
Q

Ulnar collateral ligament

A

extends from the medial epicondyle of the humerus to the coronoid process and olecranon of the ulna.
Consists of three bands

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5
Q

What are the three bands of the ulnar collateral ligament?

A

Anterior cord-like band- the strongest band
Posterior fan-like band- is the weakest
Oblique band- deepens socket for the trochlea of the humerus

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6
Q

The annular ligament

A

attaches to the ulna, anterior and posterior to the radial notch, which forms a collar that, with the radial notch, forms a ring that completely encircles the head of the radius.

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7
Q

Distal-radio-ulnar joint

A

a pivot type synovial joint. The radius moves around the relatively fixed distal end.
Articulates with the ulnar notch on the medial side of the distal end of the radius.

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8
Q

Ligaments of the distal-radio ulnar joint

A

Anterior and posterior ligaments strength the joint capsule

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