Down syndrome is the most frequent genetic cause of mental retardation. Although usually presenting dysmorphic features and organ malformations, it is rarely associated with congenital hydrocephalus. The case of male neonate whose hydrocephalus was detected since the pregnancy and was discovered to have the syndrome at birth is reported. Chromosomal analysis confirmed the genetic disorder, and ...

Last year, when d~cussing the 1979 Nobel prizewinners, we introduced a new term-of Nobel class. 1 One major indicator that a scientist is of Nobel class is the publication of several papers of high impact. More often than not, when consistently cited for a long period, such papers can be identified with major breakthroughs. Let’s see whether this is true of the 1980 Nobel prizewinners, and if n...

Motion is ubiquitous in the physical world, yet its study is much less developed than that of another common physical modality, namely shape. While we have several standardized mathematical shape descriptions and even entire disciplines devoted to that area, such as Computer-Aided Geometric Design (CAGD), the state of formal motion descriptions is still in flux. This in part because motion desc...