The temporal interval between flashing lights that is required to perceive nonsimultaneity decreases as the refractive error increases from 0 to +2 diopters. The interval then remains constant with further increases to 3 and 4 diopters. The results are discussed in terms of the relative increase of transient to sustained visual channels and of the increase in apparent movement.

enterobius vermicularis is a nematod of large intestine in man. extra intestinal localization of this parasite is rare. a 60 year old man was admitted to the hospital with the clinical manifestation of meningitis. in laboratory examination of cerebrospinal fluid (c.s.f), the appearance was red, albu-min level was high and the glucose showed normal value. haematoxylin and eosin stained slides pr...

Intussusception is a rare form of intestinal obstruction in adults. Most cases are caused by malignant lesions in the intestinal wall, which in exceptional cases are caused by metastases. The initial manifestation of lung cancer as metastasis to the gastrointestinal tract is an extremely rare event. In most cases metastases are diagnosed after the primary lung tumour, when potentially life-thre...

Mechanic intestinal obstruction, caused by the passage of biliary calculus from vesicle to intestine, through fistulization, although not frequent, deserve study due to the morbi-mortality rates. Incidence in elder people explains the association with chronic degenerative diseases, increasing complexity in terms of therapy decision. Literature discusses the need and opportunity for the one or t...