CH 9: The Elbow Flashcards

1
Q

What are the 3 main joints of the elbow + the ranges of motion they are responsible for? What is the true elbow joint?

A
  • Humeroulnar (true elbow joint) (Flexion/extension)
  • Humeroradial (flexion/extension)
  • Radioulnar (pronation/supination)
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2
Q

What are the main ligaments of the elbow?

A
  • Ulnar collateral ligament (interchangeable with MCL of elbow)
  • Radial collateral ligament (interchangeable with LCL of elbow)
  • Annular ligament
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3
Q

Characteristics of the biceps complex

A
  • Acts on both the shoulder and elbow joint
  • Both heads originate from scapula

Actions of the biceps:
- Elbow flexion
- Forearm supination
- Partial aid in shoulder flexion

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4
Q

Characteristics of the triceps complex

A
  • Only muscle on the posterior arm
  • Primary extensor of forearm
  • Crosses both shoulder and elbow joint

Actions of the triceps:
- Elbow extension
- Shoulder extension
- Aids in shoulder adduction

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5
Q

What is Ulnar Neuropraxia?

A

A S/S of bursitis of the elbow. Results in weakness and numbness into the 4th and 5th phalanges.

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6
Q

Characteristics + MOI of an Olecranon fracture

A
  • More frequently seen in middle aged men
  • Result of direct trauma or forced hyperextension
  • Will be painful swollen and discoloured
  • Possible deformity
  • Will not have the ability to extend elbow against gravity
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7
Q

What are Medial and Lateral Epicondylitis, and what are their characteristics?

A

Both conditions describe an inflammation at the elbow involving the attachment of the common flexor or extensor tendons of the forearm muscles.

Medial Epicondylitis:
- Inflamed flexor tendons
- Commonly seen in activities that involve supination and pronation on top of loading the forearm flexors
- “Golfer’s Elbow”

Lateral Epicondylitis:
- Inflamed extensor tendons
- Usually caused by eccentric loading of the forearms extensors
- “Tennis Elbow”

Both are usually a sign that there is an instability or weakness in the shoulder.

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