Podcast
Questions and Answers
What is the function of the central band of the interosseous membrane?
What is the function of the central band of the interosseous membrane?
- It serves as an attachment site for intrinsic muscles of the hand
- It transmits force distally through the lower limb
- It binds the ulna to the humerus.
- It binds the radius to the ulna (correct)
What percentage of compression force crossing the wrist is directed through the radiocarpal joint?
What percentage of compression force crossing the wrist is directed through the radiocarpal joint?
- 50%
- 80% (correct)
- 20%
- 30%
Where does 20% of the force cross the medial side of the wrist?
Where does 20% of the force cross the medial side of the wrist?
- Radiocarpal joint
- Ulnocarpal space (correct)
- Interosseous membrane
- Carpometacarpal joint
What is the purpose of transferring part of the proximal directed force through the radius to the ulna?
What is the purpose of transferring part of the proximal directed force through the radius to the ulna?
What can lead to a radius fracture?
What can lead to a radius fracture?
What type of muscles attach to the interosseous membrane?
What type of muscles attach to the interosseous membrane?
What joint shares compression forces equally with the humero-ulnar joint?
What joint shares compression forces equally with the humero-ulnar joint?
What percentage of compression force crossing the wrist is directed through the ulnocarpal space?
What percentage of compression force crossing the wrist is directed through the ulnocarpal space?
What is the significance of the interosseous membrane in transmitting force through the upper limb?
What is the significance of the interosseous membrane in transmitting force through the upper limb?
Which joint allows compression force to cross the elbow via the interosseous membrane?
Which joint allows compression force to cross the elbow via the interosseous membrane?
What is the primary direction of force transmission through the upper limb?
What is the primary direction of force transmission through the upper limb?
What is the purpose of sharing compression forces equally between the humero-ulnar and humero-radial joints?
What is the purpose of sharing compression forces equally between the humero-ulnar and humero-radial joints?
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Study Notes
- The central band of the interosseous membrane binds the radius to the ulna.
- It serves as an attachment site for extrinsic muscles of the hand.
- It transmits force proximally through the upper limb.
- 80% of compression force crossing the wrist is directed through the radiocarpal joint.
- 20% of the force crosses the medial side of the wrist through the ulnocarpal space.
- Part of the proximal directed force through the radius is transferred across the membrane to the ulna.
- This mechanism allows compression force to cross the elbow via the humero-ulnar joint.
- The humero-ulnar and humero-radial joints share compression forces equally.
- This reduces long-term wear and tear on each individual joint.
- Falling on an outstretched hand can lead to a radius fracture.
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