Your Patient Has an "Extensor Lag" of the MP Joints

question 2

Multiple Choice

Your patient has an "extensor lag" of the MP joints.What does this suggest?

• A)It is possible to extend the MP joint passively through the full range of extension, but full active MP extension is not possible, owing to weakness of the extensor digitorum.
• B)Posterior (dorsal) sliding of the proximal phalanx on the head of the metacarpal is restricted.
• C)Full passive MP extension is not possible.
• D)It is possible to extend the MP joint passively through the full range of extension, but full active MP extension is not possible, owing to weakness of the lumbricales.

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Definitions:

Loop Of Henle

A section of the nephron in the kidney involved in the reabsorption of water and salts, crucial for the concentration of urine and the regulation of water, electrolyte balance.

Permeable

Allowing liquids or gases to pass through it.

Sodium

A chemical element with symbol Na and atomic number 11, essential for many body functions, including maintaining cellular function and blood pressure.

Urea

A waste product formed in the liver that is transported in the bloodstream to the kidneys for excretion in urine, commonly used to measure kidney function.