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JPO Journal of Prosthetics and Orthotics: April 2008 - Volume 20 - Issue 2 - p 39-40
doi: 10.1097/JPO.0b013e31816a37ae
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  1. Read the article on pages 35–38.
  2. Complete the examination.
  3. Submit your completed examination to the AAOP per the directions on the next page.


The following questions require short answers only; you do not have to use complete sentences. All questions refer to the article, “Accuracy and Reliability of a System for the Digital Capture of Infant Head Shapes in the Treatment of Cranial Deformities” by Mark D. Geil, PhD and Aaron Smith, CO, LO.


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  1. [Select the correct response.] Deformational Plagiocephaly can occur _______________ in infants secondary to prolonged application of external forces.
    1. pre-natally
    2. post-natally
    3. both A and B
    4. none of the above
  2. [Select the correct response.] In this investigation, digitized shapes were used to determine head diameters along diagonal lines +/− _________from the anterior-posterior axis and circumference.
    1. 20°
    2. 30°
    3. 40°
    4. 50°
  3. True or False _________Differences versus results of hand tool measurement appeared to be due to differences in hand tool measurement technique and software measurement algorithms.
  4. True or False ___________Multiple births have also been cited as a common cause for DP.
  5. [Select the correct response.] Because Deformational Plagiocephaly is a shape- and symmetry-related condition, _________measurement and documentation are essential.
    1. cranial anthropometric
    2. cranial anthropomorphic
    3. cranial arthroscopic
    4. cranial metabolic
  6. True or False _________Of the four specific anthropometric measures determined to be important in head shape assessment, only two measures can be taken using hand tools in the absence of a digitizer.
  7. True or False _________The model used for the study was that of a seven month old female with a diagnosis of deformational plagiocephaly.
  8. True or False _________To calculate the cranial vault asymmetry index (CVAI), diagonal measurements at 30 degree diameters from the mid-sagittal line were compared.
  9. [Select the correct response.] Which of the following was not one of the dimensions that was compared in the analysis:
    1. circumference at level three
    2. diagonal distance from right anterior to left posterior
    3. diagonal distance from mid-anterior to mid-posterior
    4. diagonal distance from left anterior to right posterior
  10. [Select the correct response.] Concerning scanner results, which of the following is NOT correct:
    1. for LDIAG, scanner results were always greater than caliper results
    2. for CIRC, scanner results were always greater than tape measure results
    3. for RDIAG, scanner results were always less than caliper results
  11. True or False ____________With the scanner, circumference is measured in the transverse plane. With the tape measure, circumference is measured on a plane defined by the sellion and tragion landmarks.
  12. True or False ____________It may be concluded from the study that in general, the scanner results may be considered the more useful standard for comparison as opposed to the hand tool.

Complete the JPO Self-Assessment Examination on the previous page and score a minimum of 75 percent to earn two PCE credits. Send the completed examination and payment in U.S. currency ($20/AAOP members, $50 nonmembers) to: AAOP, Dept. 937, Alexandria, VA 22334-0937. The examination must be received by the AAOP within 3 years of the publication date for credit to be awarded.

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Credentials________________ Certification # _______________



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© 2008 American Academy of Orthotists & Prosthetists