Characteristics of Ossified Lesions in the Upper Cervical Spine Associated with Ossification of the Posterior Longitudinal Ligament in the Lower Cervical Spine

2008 ◽  
Vol 90 (4) ◽  
pp. 748-753 ◽  
Author(s):  
Yoshiharu Kawaguchi ◽  
Shoji Seki ◽  
Takeshi Hori ◽  
Tomoatsu Kimura
1998 ◽  
Vol 54 (3) ◽  
pp. 12-21
Author(s):  
Kathryn L. Smith ◽  
Claire Horn

Cervicogenic headache is a headache arising from painful dysfunction of the upper cervical spine. This paper reviews current literature on the anatomy, etiology, clinical presentation and differential diagnosis of cervicogenic headache. Lower cervical spine levels and cervical soft tissue components will be incorporated where they have a direct influence on the upper three segments.


1999 ◽  
Author(s):  
Narayan Yoganandan ◽  
Frank A. Pintar ◽  
Joseph F. Cusick ◽  
James P. Hollowell

Abstract The objective of the study was to determine the biomechanics of the human head-neck complex secondary to whiplash loading. Intact human cadaver head-neck complexes were prepared by maintaining the integrity of the skin and musculature around the ligamentous column. Retroreflective targets were inserted into the bony articulations of the cervical spine at all levels. The specimens were rigidly fixed to a six-axis load cell at the distal end. Instrumentation consisted of triaxial angular velocity sensors and accelerometers on the cranium. A linear accelerometer was attached to the distal end of the preparation. The specimens were subjected to dynamic loading at speeds ranging from 1.6 to 4.2 m/s. They were placed on the slider of the mini-sled pendulum which applied the whiplash loading pulse from the posterior to the anterior direction. The input pulse was measured in terms of acceleration-time histories. Principles of continuous motion analysis were used to determine the kinematics of the head-neck complex as a function of time. The specimens were radiographed pre- and post-test. Results indicated that the structure undergoes continuous change in the head-neck curvature. Initially, the cranium lags the cervical spine resulting in a reverse curvature, the upper cervical spine undergoes flexion with a concomitant extension of the lower cervical spine, and finally, the head catches-up with the lower cervical spine resulting in a single curvature. Increasing velocities/accelerations produced nonlinear increases in extension moment, axial and shear forces, and head-neck kinematics. These strength and kinematic information add to our knowledge of the understanding of the biomechanics of the human head-neck under whiplash.


Skull Base ◽  
2008 ◽  
Vol 18 (S 01) ◽  
Author(s):  
Harminder Singh ◽  
Bartosz Grobelny ◽  
Adam Flanders ◽  
Marc Rosen ◽  
Paul Schiffmacher ◽  
...  

Skull Base ◽  
2008 ◽  
Vol 18 (S 01) ◽  
Author(s):  
John de Almeida ◽  
Adam Zanation ◽  
Ricardo Carrau ◽  
Amin Kassam ◽  
Carl Snyderman

2021 ◽  
pp. 1-7
Author(s):  
Marko Jug

<b><i>Introduction:</i></b> In the case of tumor resection in the upper cervical spine, a multilevel laminectomy with instrumented fixation is required to prevent kyphotic deformity and myelopathy. Nevertheless, instrumentation of the cervical spine in children under the age of 8 years is challenging due to anatomical considerations and unavailability of specific instrumentation. <b><i>Case Presentation:</i></b> We present a case of 3D-printed model-assisted cervical spine instrumentation in a 4-year-old child with post-laminectomy kyphotic decompensation of the cervical spine and spinal cord injury 1 year after medulloblastoma metastasis resection in the upper cervical spine. Due to unavailability of specific instrumentation, 3D virtual planning was used to assess and plan posterior cervical fixation. Fixation with 3.5 mm lateral mass and isthmic screws was suggested and the feasibility of fixation was confirmed “in vitro” in a 3D-printed model preoperatively to reduce the possibility of intraoperative implant-spine mismatch. Intraoperative conditions completely resembled the preoperative plan and 3.5 mm polyaxial screws were successfully used as planned. Postoperatively the child made a complete neurological recovery and 2 years after the instrumented fusion is still disease free with no signs of spinal decompensation. <b><i>Discussion/Conclusion:</i></b> Our case shows that posterior cervical fixation with the conventional screw-rod technique in a 4-year-old child is feasible, but we suggest that suitability and positioning of the chosen implants are preoperatively assessed in a printed 3D model. In addition, a printed 3D model offers the possibility to better visualize and sense spinal anatomy “in vivo,” thereby helping screw placement and reducing the chance for intraoperative complications, especially in the absence of intraoperative spinal navigation.


1981 ◽  
Vol 30 (1) ◽  
pp. 41-47
Author(s):  
M. Yamanaka ◽  
G. Awaya ◽  
S. Takata ◽  
N. Nishijima ◽  
S. Shimamura

2015 ◽  
Vol 101 (4) ◽  
pp. 519-522 ◽  
Author(s):  
G. Mirouse ◽  
A. Journe ◽  
L. Casabianca ◽  
P.E. Moreau ◽  
S. Pannier ◽  
...  

Sign in / Sign up

Export Citation Format

Share Document