RESUMEN
Abnormal spontaneous activity is a hallmark of acute or subacute denervation of skeletal muscle, particularly in patients with uremic neuropathy. We report 5 patients in whom such activity was unexpectedly minimal or absent.
Asunto(s)
Músculo Esquelético/fisiopatología , Enfermedades del Sistema Nervioso Periférico/fisiopatología , Uremia/complicaciones , Adulto , Anciano , Atrofia , Neuropatías Diabéticas/fisiopatología , Electromiografía , Femenino , Humanos , Estudios Longitudinales , Masculino , Persona de Mediana Edad , Músculo Esquelético/inervación , Músculo Esquelético/patología , Degeneración Nerviosa/fisiopatología , Conducción Nerviosa , Enfermedades del Sistema Nervioso Periférico/etiología , Enfermedades del Sistema Nervioso Periférico/terapia , Diálisis Renal , Resultado del TratamientoRESUMEN
Injuries to the lumbosacral plexus during labor and delivery have been reported in the literature for years, but have lacked electrophysiologic testing to substantiate the location of the nerve injury. We report 2 cases with comprehensive electrophysiologic testing which localizes the site of this obstetrical paralysis to the lumbosacral trunk (L4-5) and S-1 root where they join and pass over the pelvic rim. The paralysis may be mild or severe. Small maternal size, a large fetus, midforceps rotation, and fetal malposition may place the mother at risk for this nerve injury.
Asunto(s)
Plexo Lumbosacro/lesiones , Complicaciones del Trabajo de Parto , Parálisis Obstétrica/diagnóstico , Adulto , Electromiografía , Femenino , Humanos , Presentación en Trabajo de Parto , Parálisis Obstétrica/etiología , EmbarazoRESUMEN
Although nuclear magnetic resonance has existed since the 1940s and was used extensively in chemistry labs for molecular structural determination, it was not until the 1970s that the possibility for magnetic resonance imaging (MRI) was realized. It is only in the last few years that the great potential of MRI to visualize the brain, joints and several other structures has been recognized. This article discusses some basic pathophysiology of cerebral ischemia as it relates to MRI and focuses on some of the advantages and disadvantages of MRI in visualizing and studying many of the resulting lesions.
Asunto(s)
Encéfalo/patología , Infarto Cerebral/diagnóstico , Imagen por Resonancia Magnética , Isquemia Encefálica/diagnóstico , HumanosRESUMEN
Bilateral hip and femoral fractures are rare. A 26-year-old male with multiple injuries including such fractures was successfully treated with a variety of internal fixation techniques, allowing early mobilization. It is important to consider the possibility of this fracture pattern in high-energy trauma.