MSK Session 5- Elbow And Joints Of The Forearm Flashcards

0
Q

Define subluxation

A

Partial dislocation of a joint so that the bone ends are misaligned, but still in contact.

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1
Q

Define dislocation

A

Complete loss of contact of the joint surfaces.

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2
Q

Which muscles allow pronation of the forearm?

A
  • pronator teres

- pronator quadratus

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3
Q

What muscles allow supination of the forearm?

A
  • biceps brachii

- supinator

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4
Q

What features allow pronation/supination?

A
  • head of the radius and capitulum articulation
  • annular ligament
  • sacciform recess
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5
Q

What separates the distal radio-ulnar joint cavity from the wrist cavity?

A

The articular disc

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6
Q

Which ligament ensures the hand follows the radius in supination?

A

Palmar radio-carpal

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7
Q

What ligament ensures the hand follows the radius in pronation?

A

Dorsal radio-carpal

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8
Q

What is abduction at the wrist limited by?

A

Radial styloid process

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9
Q

What is abduction of the hand AKA?

A

Radial deviation

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10
Q

What is adduction of the wrist AKA?

A

Ulnar deviation.

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11
Q

What type of joint is the elbow joint?

A

A hinge synovial joint

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12
Q

What type of joint is the wrist/ radio-carpal joint?

A

A condyloid synovial joint

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13
Q

What are the three articulations of the elbow joint?

A
  1. humero-ulnar joint- between the trochlea of the humerus and the trochlea notch of the ulna.
  2. Humero-radial joint- between the capitulum of the humerus and radial head.
  3. Proximal radio-ulnar joint- between the medial edge of the radial head and the radial notch of the ulna.
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14
Q

What are the three elbow ligaments that strengthen the joint capsule? Where are they found?

A
  • radial collateral - between lateral epicondyle and annular ligament of radius.
  • ulnar collateral - between the medial epicondyle, ole random and coronoid process.
  • annular ligament - collar surrounding the radial head that ensures it remains within the radial notch on ulna.
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15
Q

What is the purpose of the interosseous membrane? (2)

Which way do its fibres run?

A

Keep the radius and ulna together during pronation and supination.
Prevents superior displacement of the radius when a force is applied to the outstretched hand as allows force distribution to ulna.
Inferomedially.

16
Q

Which bursa causes miner’s elbow?

A

Subcutaneous olecranon bursa- repeated pressure on it causes inflammation.

17
Q

Which bursa becomes inflamed due to friction, and is most painful during flexion?

A

Subtendonous bursa.