How to Grow a New Head

Originally posted on Medical Genetics:
Cut most species of flatworm in half, and you end up with two flatworms. The front half will grow a new tail and, more impressively, the back half will grow a new head—complete with a fully functioning brain. But a few species of these worms mysteriously lack this ability, at…

The Neandertal genome

Originally posted on Medical Genetics:
Introduction Recent advances in high-throughput DNA sequencing have provided initial glimpses of the nuclear genome of Neandertals as well as other ancient mammals including cave bears and mammoths. In the 7 May 2010 issue of Science, an international team of researchers presents the draft sequence of the Neandertal genome composed…

Sleep: The Ultimate Brainwasher?

Originally posted on Medical Genetics:
17 October 2013 2:15 pm Scientists show that our brains clean themselves while we slumber Maiken Nedergaard/Jeff Iliff Brainwashing. When mice sleep, fluid-filled channels (pale blue) between neurons expand and flush out waste. Every night since humans first evolved, we have made what might be considered a baffling, dangerous mistake.…

Alzheimer’s Disease

Originally posted on Medical Genetics:
Looking into the Crystal Ball for Alzheimer’s Disease William J. Mack University of Southern California, Los Angeles, CA 90033, USA. E-mail: William.Mack@med.usc.edu As our population ages, the incidence of Alzheimer’s disease (AD) continues to increase at a rapid rate. An estimated 5 to 10% of individuals over 65, and 40% of…