Archives of Orthopaedic and Trauma Surgery

, Volume 115, Issue 3–4, pp 203–205 | Cite as

Atrophy of the nuchal muscle and change in cervical curvature after expansive open-door laminoplasty

  • Y. Fujimura
  • Y. Nishi
Clinical and Experimental Forum


We analyzed computed tomography (CT) images and plain X-ray films of 53 patients who had undergone expansive open-door laminoplasty, in a 3-year study. The relationship between the postoperative changes in the nuchal muscles and those in the cervical curvature was investigated. On postoperative CT images, the cross-sectional area of all nuchal muscles was reduced to approximately 80% of its preoperative size. This atrophic change was especially intense in the multifidus muscle and the semispinalis cervicis muscle. Postoperative cross-sectional area of the deep nuchal muscles was reduced approximately 30% from its preoperative size. No significant correlation was found between the all cross-sectional area of the nuchal muscles and the cervical curvature. However, a weak correlation was found between the deep nuchal muscles area and the curve index (correlation coefficient 0.29).


Compute Tomography Compute Tomography Image Weak Correlation Postoperative Change Muscle Area 
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Copyright information

© Springer-Verlag 1996

Authors and Affiliations

  • Y. Fujimura
    • 1
  • Y. Nishi
    • 1
  1. 1.Department of Orthopaedic Surgery, School of MedicineKeio UniversityTokyoJapan

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