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a10. MSK (Anatomy: Upper limb) > 3.5.1. The Wrist Joint > Flashcards

3.5.1. The Wrist Joint Flashcards

1
Q

What is the Wrist Joint also known as?

A

Radiocarpal Joint

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2
Q

What type of Joint is the Radiocarpal Joint?

A

Synovial Condyloid (or Ellipsoid) Joint

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3
Q

What does the Radiocarpal Joint mark the Transition Between?

A
  1. Forearm
  2. Hand
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4
Q

What forms the Radiocarpal Joint Proximally?

A
  1. The Distal End of the Radius
  2. The Articular Disk
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5
Q

What forms the Radiocarpal Joint Distally?

A

Proximal Row of Carpal Bones (Except the Pisiform)

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6
Q

Is the Ulna part of the Radiocarpal Joint?

A

No

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7
Q

Why is the Ulna not part of the Radiocarpal Joint?

A
  1. It Articulates with the Radius, just Proximal to the Wrist Joint, at the Distal Radio-Ulnar Joint.
  2. It is prevented from Articulating with the Carpal Bones by the Articular Disk (A Fibrocartilaginous Ligament) which lies over the Superior Surface of the Ulna
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8
Q

What Type of Surface do the Carpal Bones form?

A

A Convex Surface

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9
Q

What Type of Surface does the Radius and Articular Disk form?

A

A Concave Surface

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10
Q

Does the Radiocarpal Joint have a Joint Capsule?

A

Yes

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11
Q

How many layers does the Radiocarpal Joint have?

A

2 - It is Dual Layered

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12
Q

What are the 2 Layers of the Radiocarpal Joint’s Capsule?

A
  1. Fibrous (Outer) Layer
  2. Synovial Membranous (Internal) Layer
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13
Q

What does the Fibrous (Outer) Layer attach to?

A
  1. Radius
  2. Ulna
  3. Proximal Row of Carpal Bones
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14
Q

What does the Synovial Membrane, of the Internal Layer, secrete?

A

Synovial Fluid

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15
Q

What is the function of the Synovial Fluid?

A

To Lubricate the Joint

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16
Q

How many Significant Radiocarpal Joint Ligaments are there?

A

4

17
Q

What are the Significant Radiocarpal Joint Ligaments?

A
  1. Palmar Radiocarpal
  2. Dorsal Radiocarpal
  3. Ulnar Collateral
  4. Radial Collateral
18
Q

Where is the Palmar Radiocarpal Ligament located?

A

Plamar (Anterior) Side of the Hand

19
Q

Where does the Palmar Radiocarpal Ligament pass:
1. From?
2. To?

A
  1. Radius
  2. Both Rows of Carpal Bones
20
Q

What is the function of the Palmar Radiocarpal Ligament?

A
  1. Increasing Stability of the Radiocarpal Joint
  2. Ensuring the Hand follows the Forearm during Supination
21
Q

Where is the Dorsal Radiocarpal Ligament located?

A

Dorsal (Posterior) Side of the Hand

22
Q

Where does the Dorsal Radiocarpal Ligament pass:
1. From?
2. To?

A
  1. Radius
  2. Both Rows of Carpal Bones
23
Q

What is the function of the Dorsal Radiocarpal Ligament?

A
  1. Increasing Stability of the Radiocarpal Joint
  2. Ensuring the Hand follows the Forearm during Pronation
24
Q

Where does the Ulnar Collateral Ligament pass:
1. From?
2. To?

A
  1. Styloid Process of the Ulna
  2. Triquetrum and Pisiform (Medial Carpal Bones)
25
Q

What is the function of the Ulnar Collateral Ligament?

A

Works in Union with the Radial Collateral Ligament to prevent Excessive Lateral Joint Displacement

26
Q

Where does the Radial Collateral Ligament pass:
1. From?
2. To?

A
  1. Styloid Process of the Radius
  2. Scaphoid and Trapezium (Lateral Carpal Bones)
27
Q

What is the function of the Radial Collateral Ligament?

A

Works in Union with the Radial Collateral Ligament to prevent Excessive Lateral Joint Displacement

28
Q

Where does the Radiocarpal Joint receive Blood Branches from?

A
  1. Dorsal Carpal Arch
  2. Palmar Carpal Arch
29
Q

What are the Dorsal and Palmar Carpal Arches derived from?

A
  1. Radial Artery
  2. Ulnar Artery
30
Q

Which Nerves are responsible for the Movement of the Radiocarpal Joint?

A
  1. Posterior Interosseous Branch of the Radial Nerve
  2. Anterior Interosseous Branch of the Median Nerve
  3. Deep Branch of the Ulnar Nerve
  4. Dorsal Branch of the Ulnar Nerve
31
Q

How many Axes Can the Radiocarpal Joint move in?

A

2

32
Q

What are the 4 Movements which can occur at the Wrist Joint?

A
  1. Flexion
  2. Extension
  3. Adduction
  4. Abduction
33
Q

What Muscles produce Flexion at the Radiocarpal Joint?

A
  1. Flexor Carpi Ulnaris
  2. Flexor Carpi Radialis
  3. Flexor Digitorum Superficialis (assists but is not a main one)
34
Q

What Muscles produce Extension at the Radiocarpal Joint?

A
  1. Extensor Carpi Radialis Longus
  2. Extensor Carpi Radialis Brevis
  3. Extensor Carpi Ulnaris
  4. Extensor Digitorum (assists but is not a main one)
35
Q

What Muscles produce Adduction at the Radiocarpal Joint?

A
  1. Extensor Carpi Ulnaris
  2. Flexor Carpi Ulnaris
36
Q

What Muscles produce Abduction at the Radiocarpal Joint?

A
  1. Extensor Carpi Radialis Longus
  2. Extensor Carpi Radialis Brevis
  3. Flexor Carpi Radialis

a10. MSK (Anatomy: Upper limb) (48 decks)

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