4.6. Ligaments in the Hand Flashcards

1
Q

How many Groups of Ligaments are there in the Hand?

A

4

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2
Q

What are the Groups of Ligaments are there in the Hand?

A
  1. Flexor Retinaculum
  2. Extensor Retinaculum
  3. Palmar (Volar) Plates
  4. Collateral Ligaments
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3
Q

What is the Flexor Retinaculum?

A

A Thick Strip of Connective Tissue

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4
Q

What does the Flexor Retinaculum form?

A

The Roof of the Carpal Tunnel

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5
Q

What is the function of the Flexor Retinaculum in the Carpal Tunnel?

A

It Protects the Structures within the Carpal Tunnel

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6
Q

What does the Flexor Retinaculum attach to Medially?

A
  1. Pisiform

2. Hook of Hamate

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7
Q

What does the Flexor Retinaculum attach to Laterally?

A
  1. Scaphoid

2. Trapezium

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8
Q
  1. What is the Extensor Retinaculum?

2. Where is it Located

A
  1. A Thickening of the Fascia

2. On the Dorsum of the Hand

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9
Q

What is the function of the Extensor Retinaculum?

A

It Keeps the Extensor Tendons in Position

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10
Q

What is prevented by the Extensor Retinaculum keeping the Extensor Tendons in Position?

A

Bowstringing

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11
Q

Where are the Palmar (Volar) Plates located?

A
  1. Palmar Side of each Metacarpophalangeal Joint

2. Palmar Side of each Interphalangeal Joint

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12
Q

What is the function of the Palmar (Volar) Plates?

A
  1. Limit Hyperextension of the Digit

2. Enhances its Stability

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13
Q

Where are the Collateral Ligaments located?

A
  1. Medial Side of the Metacarpophalangeal Joints
  2. Lateral Side of the Metacarpophalangeal Joints
  3. Medial Side of the Interphalangeal Joints
  4. Lateral Side of the Interphalangeal Joints
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14
Q

What are the Collateral Ligaments taught?

A

When the Fingers are Flexed

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15
Q

What is the function of the Collateral Ligaments when taught?

A

Prevention of Abduction when the Fist is Clenched

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16
Q

When are the Collateral Ligaments lax?

A

When the Fingers are Extended

17
Q

What is the result of the Collateral Ligaments being lax when the Fingers are Extended?

A

It Allows for Abduction of the Fingers when in position