Cervical Spinal Cord Injury with Ossific Ation of the Posterior Longitudinal Ligament.

Mihara, Keiji; Torigoshi, Takayoshi; Konishi, Hiroaki; Hara, Shigeru; Harada, Shinichi; Shiraishi, Masaya

doi:10.5035/nishiseisai.40.763

Cited by 2 publications

(1 citation statement)

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“…Some authors have reported cervical cord injury in OPLL patients without radiologic bone abnormality (1,2). Mihara reported 10 cases of cervical cord injury in patients with OPLL (2). None had radiologic bone abnormality, and 6 suffered only very minor trauma.…”

Section: Ossification Of the Posterior Longitudinal Ligament (Opll)mentioning

confidence: 99%

Flexion Model Simulating Spinal Cord Injury Without Radiographic Abnormality in Patients With Ossification of the Longitudinal Ligament: The Influence of Flexion Speed on the Cervical Spine

Kato

Kanchiku

Imajo

et al. 2009

The Journal of Spinal Cord Medicine

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Background/Objective: It is suspected that the speed of the motion of the spinal cord under static compression may be the cause of spinal cord injury (SCI). However, little is known about the relationship between the speed of the motion of the spinal cord and its stress distributions. The objective was to carry out a biomechanical study of SCI in patients with ossification of the longitudinal ligament without radiologic evidence of injury. Methods: A 3-dimensional finite element spinal cord model was established. After the application of static compression, the model underwent anterior flexion to simulate SCI in ossification of the longitudinal ligament patients without radiologic abnormality. Flexion of the spine was assumed to occur at 1 motor segment. Flexion angle was 5u, and flexion speeds were 0.5u/s, 5u/s, and 50u/s. Stress distributions inside of the spinal cord were evaluated. Results: Stresses on the spinal cord increased slightly after the application of 5u of flexion at a speed of 0.5u/s. Stresses became much higher at a speed of 5u/s and increased further at 50us. Conclusions: The stress distribution of the spinal cord under static compression increased with faster flexion speed of the spinal cord. High-speed motion of the spinal cord under static compression may be one of the causes of SCI in the absence of radiologic abnormality.

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Section: Ossification Of the Posterior Longitudinal Ligament (Opll)mentioning

confidence: 99%

Flexion Model Simulating Spinal Cord Injury Without Radiographic Abnormality in Patients With Ossification of the Longitudinal Ligament: The Influence of Flexion Speed on the Cervical Spine

Kato

Kanchiku

Imajo

et al. 2009

The Journal of Spinal Cord Medicine

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Acute Cervical Spinal Cord Injury Complicated by Preexisting Ossification of the Posterior Longitudinal Ligament

Chikuda

Seichi²,

Takeshita

et al. 2011

Spine

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Cervical Spinal Cord Injury with Ossific Ation of the Posterior Longitudinal Ligament.

Cited by 2 publications

References 1 publication

Flexion Model Simulating Spinal Cord Injury Without Radiographic Abnormality in Patients With Ossification of the Longitudinal Ligament: The Influence of Flexion Speed on the Cervical Spine

Flexion Model Simulating Spinal Cord Injury Without Radiographic Abnormality in Patients With Ossification of the Longitudinal Ligament: The Influence of Flexion Speed on the Cervical Spine

Acute Cervical Spinal Cord Injury Complicated by Preexisting Ossification of the Posterior Longitudinal Ligament

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