Assuntos
Febre/terapia , Imunoterapia/métodos , Mielite Transversa/terapia , Adulto , Febre/líquido cefalorraquidiano , Febre/complicações , Febre/diagnóstico por imagem , Humanos , Imageamento por Ressonância Magnética , Masculino , Mielite Transversa/líquido cefalorraquidiano , Mielite Transversa/complicações , Mielite Transversa/diagnóstico por imagem , Bandas Oligoclonais/líquido cefalorraquidianoRESUMO
Affordances represent features of an object that trigger specific actions. Here we tested whether the presence and orientation of a handle on a cup could bias grasping movements towards it in conditions where subjects were explicitly told to ignore the handle. We quantified the grip aperture profile of twelve healthy participants instructed to grasp a cup from its body while it either had no handle, a handle pointing towards, or away from the grasping hand (3 'move' conditions, with large grip aperture). To ensure the smaller grip aperture afforded by the handle was implicitly processed, we interspersed trials in which participants had to grasp the cup from its handle or a handle not attached to a cup with a small grip aperture. We found that grip aperture was smaller in the presence of a handle in the 'move' conditions, independently of its orientation. Our finding, of an effect of the handle during the execution of a grasp action, extends previous evidence of such an influence measured during motor preparation using simple reaction times. It suggests that the specific action elicited by an object's attribute can affect movement performance in a sustained manner throughout movement execution.
Assuntos
Força da Mão , Desempenho Psicomotor , Percepção Visual , Adulto , Análise de Variância , Feminino , Humanos , Masculino , Destreza Motora , Movimento , Tempo de Reação , Adulto JovemRESUMO
Acquired copper deficiency has been recently recognized as a cause of myelopathy, and has been reported to occur many years after gastric bypass surgery performed to aid weight reduction in morbidly obese patients. We report a case of a young woman treated by hemodialysis who presented with acute neurological symptoms 5 months after gastric bypass surgery for severe obesity. She had symptoms and signs of cerebellar, spinal cord and peripheral nerve disease, which improved following parenteral copper supplementation. Now that gastric bypass surgery is being offered to morbidly obese hemodialysis patients, this case highlights the importance of monitoring copper levels in hemodialysis patients following gastric bypass surgery.
