Working with human subjects to measure internal loadings of lumbar spine is difficult. Numerical modeling makes it possible to study response of spine to a variety of loading conditions. This paper reports the development of a rigid body model of spine using a forward kinematics approach. The model consists of accurate CAD representations of vertebrae interconnected by intervertebral discs prov...

Posterior lumbar interbody fusion (PLIF) is a procedure used to treat problems such as disc degeneration, disc herniation, and spine instability. In this procedure, the surgeon works on the spine from the back and removes a spinal disc in the lower (lumbar) spine. The surgeon inserts bone graft material into the space between the two vertebrae where the disc was removed (the interbody space). T...

A 68-year-old woman with a history of breast cancer, who had undergone left quadrantectomy 24 years prior, had suffered from palmoplantar pustulosis (PPP) and pain in multiple joints and bones for 3 years. Technetium bone scanning showed increased uptake in the sternum, sternocostoclavicular joint, cervical vertebrae, lumbar vertebrae, and right knee (Picture 1, left). A radiograph of the lumba...

STUDY DESIGN Retrospective study. PURPOSE Identification of transitional vertebra is important in spine imaging, especially in presurgical planning. Pasted images of the whole spine obtained using high-field magnetic resonance imaging (MRI) are helpful in counting vertebrae and identifying transitional vertebrae. Counting vertebrae and identifying transitional vertebrae is challenging in isol...

The spinal column is the central structure in the vertebrate body from which stability, movement, and posture all derive. The vertebrae of the spine are organized into four regions (listed in order from cranial to caudal): cervical, thoracic, lumbar, and pelvic. These regions are classified by their differences in curvature. The human spine usually consists of thirtythree vertebrae, seven of wh...

Background Recently, the sagittal evaluation of the spine moved from a regional spinal view (curves) to the bodily view (“sagittal balance”), looking at the relationships between the gravity force (vertical or horizontal lines) and pelvic, and spinal, parameters. To move the analysis of the frontal plane from a spinal to a bodily view, we introduce the concept of “slopes”: inclination of the sp...

The spinal column is the central structure in the vertebrate body from which stability, movement, and posture all derive. The vertebrae of the spine are organized into four regions (listed in order from cranial to caudal): cervical, thoracic, lumbar, and pelvic. These regions are classified by their differences in curvature. The human spine usually consists of thirtythree vertebrae, seven of wh...

The spinal column is the central structure in the vertebrate body from which stability, movement, and posture all derive. The vertebrae of the spine are organized into four regions (listed in order from cranial to caudal): cervical, thoracic, lumbar, and pelvic. These regions are classified by their differences in curvature. The human spine usually consists of thirtythree vertebrae, seven of wh...

The spinal column is the central structure in the vertebrate body from which stability, movement, and posture all derive. The vertebrae of the spine are organized into four regions (listed in order from cranial to caudal): cervical, thoracic, lumbar, and pelvic. These regions are classified by their differences in curvature. The human spine usually consists of thirtythree vertebrae, seven of wh...

The spinal column is the central structure in the vertebrate body from which stability, movement, and posture all derive. The vertebrae of the spine are organized into four regions (listed in order from cranial to caudal): cervical, thoracic, lumbar, and pelvic. These regions are classified by their differences in curvature. The human spine usually consists of thirtythree vertebrae, seven of wh...