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Elbow > Anatomy > Flashcards

Anatomy Flashcards

1
Q

What is the mean carrying angle of the elbow in full extension?

A

11-14*

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2
Q

What is the angle of the interosseous membrane from the radius to the ulna? And what is its role after excision of the radial head?

A

It is angled dismally at a 21 degree angle.

The central band is 1.5-2 CN wide and is responsible for 71% of the IOM stiffness after radial head excision.

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3
Q

During CKC UE exercises, how much weight is transmitted through the elbow?

A

60% radiocapitellar joint
40% ulnohumeral joint

Greatest force between 0-30* of flexion

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4
Q

What is the primary elbow flexor?

A

Brachialis but brachioradialis has the longest lever arm

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5
Q

What is the primary pronator?

A

Pronator quadratus

Pronator teres activity increase with speed and resistance

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6
Q

What is the primary supinator?

A

With slow movements the supinator will act independently but with any resistance or speed the biceps is the big mover.

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7
Q

How does forearm position effect MMT for flexion of the elbow?

A

Neutral - brachioradialis
Pronated - minimizes biceps
Brachialis is not effected by forearm position

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8
Q

What is the nerve root, nerve and action of… Brachialis

A

C5, C6
Musculocutaneous
Flexion

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9
Q

What is the nerve root, nerve and action of… Biceps Brachii

A

C5, C6
Musculocutaneous
Flexion, supination

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10
Q

What is the nerve root, nerve and action of… Bracioradialis

A

C5, C6
Radial
Flexion

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11
Q

What is the nerve root, nerve and action of… Triceps

A

C7
Radial
Extension

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12
Q

What is the nerve root, nerve and action of… Anconeus

A

C7
Radial
Extension

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13
Q

What is the nerve root, nerve and action of… Pronator Teres

A

C6, C7
Median
Pronation

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14
Q

What is the nerve root, nerve and action of…

Pronator quadratus

A

C6, C7
Median
Pronation

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15
Q

At what age is ossification of the elbow complete?

A

12- the lateral epicondyle is the last to ossify

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16
Q

What is the nerve root, nerve and action of…

Supinator

A

C5, C6, C7
Deep beach of the radial
Supination

17
Q

What is a possible complication of medial elbow surgery?

A

Painful neuromas due to the medial antebrachial cutaneous nerve being disrupted during surgery.

18
Q

In what position of the elbow is there maximal volume of the capsule and what is that volume?

A

80* of flexion

15-30ml

Elbow (2 decks)

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