Pre-existent vertebral rotation in the human spine is influenced by body position

Pre-existent Vertebral Rotation in the Normal Spine

INTRODUCTION: Vertebral rotation is an important component of scoliosis. Whereas the typical curves and their associated rotation in AIS have been well described, little is known of possible patterns of rotation in the normal, non-scoliotic spine. Rotation in the normal spine is relevant to the curve patterns seen in AIS. The purpose of this study was to determine if there is a pre-existent pat...

Blood Flow in the Vertebral Arteries When Strained by Lateral Rotation in the Upper Cervical Spine

Enlarging vertebral body pneumatocysts in the cervical spine.

An intravertebral pneumatocyst is a relatively rare condition, and its natural course and etiology are unclear. We report a case of intravertebral pneumatocysts in the C5 vertebra that gradually enlarged during a 16-month period as documented by follow-up CT. In addition, direct communication was observed between the gas in the intervertebral disk and another pneumatocyst in the C6 vertebral bo...

Plantar sensory vibration thresholds are not influenced by body position

Monitoring skin sensitivity is studied to clarify its relationship on balance. Measuring skin sensitivity is performed when subjects are sitting or lying, whereas balance tests are measured during standing. However, afferent signal processing and subsequent efferent responses can be altered by different body positions. Therefore, this study investigated whether vibration perception thresholds (...

The Effect of Vertebral Body Geometry on Pedicle Screw Fixation Biomechanics in Human Lumbar Spine

Ata M. Kiapour, Ph.D., Laura E. Buckenmeyer, M.S., Kristophe J. Karami, D.O., Vijay K. Goel, Ph.D., Teck M. Soo, M.D., Constantine K. Demetropoulos, PhD. Boston Children's Hospital, Harvard Medical School, Boston, MA, USA, University of Toledo, Toledo, OH, USA, Johns Hopkins University, Baltimore, MD, USA, St John Providence Hospital, Southfield, MI, USA, Johns Hopkins University, Laurel, MD, USA.