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MRCS Anatomy - Upper Limb > Radioulnar Joints > Flashcards

Radioulnar Joints Flashcards

1
Q

What surfaces articulate in the proximal radioulnar joint

A

Head of radius

Radial notch of ulna

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2
Q

What surfaces articulate in the distal radioulnar joint

A

Ulnar notch of radius

Ulnar head

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3
Q

What type of joints are the radioulnar joints

A

Pivot joint

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4
Q

In the proximal radioulnar joint, what holds the radial head in place

A

Annular radial ligament

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5
Q

What lines the annular radial ligament

A

Synovial membrane

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6
Q

How is movement produced at the proximal radioulnar joint

A

Head of radius rotating with the annular ligament

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7
Q

What are the movements possible at the proximal radioulnar joint

A

Pronation

Supination

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8
Q

What muscles produce pronation at the proximal radioulnar joint

A

Pronator quadratus

Pronator teres

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9
Q

What muscles produce supination at the proximal radioulnar joint

A

Supinator

Biceps brachii

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10
Q

What ligaments strengthen the distal radioulnar joint

A

Palmar radioulnar ligament
Dorsal radioulnar ligament
Articular disk

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11
Q

What is the function of the articular disk in the distal radioulnar joint

A

Binds radius and ulna together during movement

Separates distal radioulnar joint from wrist joint

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12
Q

How are movements produced at the distal radioulnar joint

A

Ulnar notch of radius slides anteriorly over head of ulnar

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13
Q

What movement is produced at the distal radioulnar joint

A

Pronation

Supination

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14
Q

What muscles produce pronation at the distal radioulnar joint

A

Pronator quadratus

Pronator teres

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15
Q

What muscles produce supination at the distal radioulnar joint

A

Supinator

Biceps brachii

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16
Q

What is the interosseous membrane

A

Sheet of connective tissue joining radius and ulna together between radioulnar joints

17
Q

What are the major functions of the interosseous membrane

A

Holds radius and ulna together during pronation and supination
Acts as a site of attachment for muscles in the anterior and posterior compartments of the forearm
Transfers forces from radius to ulna

18
Q

What is Monteggia’s fracture

A

Proximal shaft of ulna fracture

Head of radius dislocates anteriorly at elbow

19
Q

What is Galeazzi’s fracture

A

Fracture to distal radius

Ulna head dislocating at distal radio-ulnar joint

MRCS Anatomy - Upper Limb (33 decks)

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