Each of the Following Is True About Lesions of the Extensor

question 9

Multiple Choice

Each of the following is true about lesions of the extensor tendons of the wrist and hand except:

• A)A mallet finger is a lesion of the extensor mechanism of the DIP joint and is managed nonoperatively with an orthosis for positioning in full extension.
• B)A lesion of the central tendon (central slip) of the extensor hood, if untreated, will result in a PIP flexion contracture and boutonnière deformity over time.
• C)If a tendon lesion occurs in zone V, PIP and DIP extension is disrupted, but MP extension remains intact.
• D)A laceration of the extensor tendons in zone VII can cause a wrist flexion deformity and requires surgery to repair the lesion.

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Definitions:

Net Sales

Sales revenue less sales returns and allowances and less sales discounts.

High-Low Method

A technique used in management accounting and cost accounting to split fixed and variable costs based on the highest and lowest levels of activity.

Mixed Cost

Expenses that have both a fixed and variable component, changing with the level of activity.

Variable Cost

Costs that vary directly with the level of production or with the volume of output.