Intraarticular Ankle Block
When performing an intraarticular ankle block, an anterolateral approach is preferred. Indications for Use An intraarticular ankle block is used for ankle fracture reduction. Precautions 1. Use of the lateral…
Ossification of the posterior longitudinal ligament
Key points • Ossification of the posterior longitudinal ligament (OPLL) is a hyperostotic condition of the spine associated with severe neurologic deficits. The incidence is higher in East Asians. •…
Lumbar spinal stenosis
Key points • Lumbar spinal stenosis is a complex disease with a plethora of clinical and imaging phenotypes. • Developmental lumbar spinal stenosis is caused by mal-development of pedicles and…
Displacement of intervertebral discs
Key points • Intervertebral disc displacement is not a “disease,” but is a component of many variations of disorders of the spine. • The displaced disc material and the effects…
Vertebral bone marrow (Modic) changes
Key points • Modic changes are subchondral and vertebral bone marrow changes in conjunction with intervertebral disc degeneration, and they are classified into three categories (types 1, 2, and 3)…
Vertebral endplate abnormalities, defects, and changes
Key points • The vertebral endplate is the key regulator of disc nutrient and oxygen transport. • The endplate is composed of an inner bony and an outer cartilaginous layer…
Spinal alignment
Key points • Global spinal balance is equally important as it is a dynamic process that includes the spine along with compensatory mechanisms consisting of the hips, and ankles. •…
Facet joints
Key Points • Pathologic changes seen in facet joint degeneration include fibrillation, joint space narrowing, articular cartilage thinning, subchondral bone sclerosis, osteophytosis, and development of juxta-facet cysts. • Risk factors…
Paraspinal muscles
Key points • Erector spinae, lumbar multifidus, quadratus lumborum, and psoas major are commonly investigated paraspinal muscles. • Magnetic resonance imaging and computed tomography provide high-quality muscle images for the…
High-intensity zones and annular tears
Key points • High-intensity zones (HIZs) represent a hyperintense signal on T2-weighted MRI in the region of the annulus fibrosus and can be used to represent annular tears. • HIZs…
