4.6. Ligaments in the Hand Flashcards
How many Groups of Ligaments are there in the Hand?
4
What are the Groups of Ligaments are there in the Hand?
- Flexor Retinaculum
- Extensor Retinaculum
- Palmar (Volar) Plates
- Collateral Ligaments
What is the Flexor Retinaculum?
A Thick Strip of Connective Tissue
What does the Flexor Retinaculum form?
The Roof of the Carpal Tunnel
What is the function of the Flexor Retinaculum in the Carpal Tunnel?
It Protects the Structures within the Carpal Tunnel
What does the Flexor Retinaculum attach to Medially?
- Pisiform
- Hook of Hamate
What does the Flexor Retinaculum attach to Laterally?
- Scaphoid
- Trapezium
- What is the Extensor Retinaculum?
- Where is it Located
- A Thickening of the Fascia
- On the Dorsum of the Hand
What is the function of the Extensor Retinaculum?
It Keeps the Extensor Tendons in Position
What is prevented by the Extensor Retinaculum keeping the Extensor Tendons in Position?
Bowstringing
Where are the Palmar (Volar) Plates located?
- Palmar Side of each Metacarpophalangeal Joint
- Palmar Side of each Interphalangeal Joint
What is the function of the Palmar (Volar) Plates?
- Limit Hyperextension of the Digit
- Enhances its Stability
Where are the Collateral Ligaments located?
- Medial Side of the Metacarpophalangeal Joints
- Lateral Side of the Metacarpophalangeal Joints
- Medial Side of the Interphalangeal Joints
- Lateral Side of the Interphalangeal Joints
What are the Collateral Ligaments taught?
When the Fingers are Flexed
What is the function of the Collateral Ligaments when taught?
Prevention of Abduction when the Fist is Clenched
