<Originals>Ponticulus Posticus : Its Clinical Significance

  • MIKI Takaaki
    Department of Orthopaedic Surgery, Kinki University School of Medicine
  • OKA Masanori
    Department of Orthopaedic Surgery, Kinki University School of Medicine
  • URUSHIDANI Hidenori
    Department of Orthopaedic Surgery, Kinki University School of Medicine
  • HIROFUJI Eikazu
    Department of Orthopaedic Surgery, Kinki University School of Medicine
  • TANAKA Seisuke
    Department of Orthopaedic Surgery, Kinki University School of Medicine
  • IWAMOTO Sotaro
    Department of Anatomy, Kinki University School of Medicine

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Description

Ponticulus posticus is an bony arch connecting between the superior articular condyle and the posterior arch of atlas, under which vertebral artery and suboccipital nerve pass.^2 In a radiological survey of 307 Japanese patients ponticulus posticus was found in 28 (9.1%) and more frequently seen in males. Age was not the decisive factor regarding incidence. In patients with at least one narrow disc space, the possible occurrence of ponticulus posticus was greater.

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