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Anatomy > Radius > Flashcards

Radius Flashcards

1
Q

Which is longer radius or ulna?

A

Radius is the shorter bone

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2
Q

Which is the lateral bone of forearm?

A

Radius

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3
Q

Why called radius?

A

Can rotate relative to ulna

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4
Q

Radius articulates with which part of humerus?

A

With the capitulum

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5
Q

At distal end the radius articulate with which wrist bones?

A

Scaphoid and lunate

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6
Q

Where is radioulnar joint formed?

A

Where radius articulates with ulna at radial notch of ulna

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7
Q

The cord that connects radius to ulna?

A

Oblique cord

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8
Q

Name the 2 ligaments of radius?

A
  1. Annular ligament of radius (surrounds the head of radius to keep it in place)
  2. Radial Collateral ligament (btw lateral epicondyle of humerus and annular ligament)
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9
Q

Styloid process of anterior surface of radius should be at which side?

A

Lateral - away from body (towards thumb)

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10
Q

Pronation and supination of forearm is due to?

A

Radioulnar joints- as radius rotates

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11
Q

What is nursemaid’s elbow?

A

When radius gets forced out of annular ligament - Radial head subluxation

Common in young children at the age of 2-5

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12
Q

What is the difference between a radial head subluxation and a dislocation?

A

A person with a radial head subluxation has a partial dislocation, where the annular ligament that holds the radial bone in place at the elbow has slipped over the top of the bone. A dislocation is where the affected bone is forced completely out of position.

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13
Q

What are the supinators of forearm?

A

2 supinators:
1.The biceps brachii (attach to radial tuberosity)
2. Supinator at the back (originates on ulna and wraps around proximal radius)

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14
Q

What are the pronators of forearm?

A

2 pronators:
1. Pronator Teres (proximally)
2. Pronator Quadratus (distally)

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15
Q

How many surfaces of radius?

A

3:
1. Anterior
2. Posterior
3. Lateral

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16
Q

How many borders of radius?

A

3:
1. Anterior
2. Posterior
3. Interosseous

17
Q

In the middle of the lateral surface of radius there’s a site for attachment of which muscle?

A

Pronator teres mucle

18
Q

Styloid process is formed by which side of radius?

A

Lateral

19
Q

Ulnar notch is present on which side??

A

Medially

20
Q

Name the fractures of forearm bones?

A

Radius

  1. Colles fracture (dorsal angulation )
  2. Fracture of the radial head
  3. Smith’s fracture (palmar angulation)

Radius & Ulna

  1. Monteggia (proximal ulna + radial head)
  2. Galeazzi (distal radius + ulnar head at distal radioulnarjoint)
21
Q

What is colle’s fracture?

A

Colle D😎

-most common
Fall onto an outstretched hand
Causing fracture of the distal radius

  • Dinner fork deformity
    (Dorsally displaced)
  • structures distal to the fracture (wrist & hand) displaced posteriorly
22
Q

Radius and Ulna are attached by?

A

Interosseus membrane that transmits the force of trauma between them

23
Q

Which nerve is damaged during Colles fracture?

A

Median Nerve gets compressed between radial fragments leading to Carpal Tunnel Syndrome

24
Q

What is Monteggia fracture?

A

M-monteggia
U-proximal Ulnar fracture
R-radial head dislocates

-Proximal shaft of ulna is fractured

-Head of radius dislocates

25
Q

What is Galeazzi fracture?

A

+Fracture of Distal Radius
-ulna head dislocates

26
Q

What is Smith’s fracture?

A
  • Falling on Back of hand
  • Distal fragment displaced Anteriorly
    -Opposite of Colles fracture
27
Q

Dorsal angulation of the distal bone fragment?

A

Colle’s fracture

28
Q

Palmar angulation of distal bone fragment?

A

Smith’s fracture

29
Q

Difference between smith and colle’s fracture?

A

A Smith fracture is caused by a fall onto the back of the hand and results in a volar angulation of the wrist, while a Colles fracture is caused by a fall onto the palm of the hand and results in a dorsal angulation of the wrist.

30
Q

Difference between montaggia and galeazzi?

A

A Monteggia fracture involves a fracture of the proximal ulna and a dislocation of the radial head.

A Galeazzi fracture involves a fracture of the distal radius and dislocation of the distal radioulnar joint.
.

31
Q

What is compartment syndrome?

A

Compartment syndrome is a condition in which pressure builds up within a confined space in the body, causing pain, swelling, and tissue damage.
Constricts blood vessels.

32
Q

On the posterior surface of radius which turbercle is present?

A

Dorsal tubercle

33
Q

What groove is present on the medial side of the dorsal tubercle?

A

Groove for tendon of extensor pollicis longus

Anatomy (7 decks)

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