Orthotic Correction of Sitting Abnormality in Achondroplastic Children

  • A. A. Siebens
  • N. Kirby
  • D. Hungerford
Part of the Basic Life Sciences book series (BLSC, volume 48)


The spine of the achondroplastic child is poorly structured for weight-bearing (1, 2):
  1. 1.

    because the pedicles of the vertebrae are shortened, the distance between the two facet joints and between the facet joints and the vertebral body are less than normal. An abnormally narrowed and shortened weight-bearing structure results;

  2. 2.

    the ligamentous support of the spine is also affected adversely, for laxity of ligaments is among the characteristics of achondroplasia;

  3. 3.

    shortened ribs compound the problems of maintaining an erect trunk by reducing the bracing against flexion of the thoracic spine which longer ribs normally provide.



Spinal Canal Thoracic Spine Facet Joint Spinal Stenosis Ligamentum Flavum 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Plenum Press, New York 1988

Authors and Affiliations

  • A. A. Siebens
    • 1
  • N. Kirby
    • 2
  • D. Hungerford
    • 3
  1. 1.Rehabilitation ServicesJohns Hopkins and Good Samaritan HospitalsBaltimoreUSA
  2. 2.Rehabilitation ServicesThe Good Samaritan HospitalBaltimoreUSA
  3. 3.Orthopaedic Surgery Dept.Johns Hopkins Univ. and The Good Samaritan HospitalsBaltimoreUSA

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