Cerebral Hemispheres 2


Stem Cells and the Brain

Stem cells are probably one of the least understood (by the public), yet most fascinating, biological entities we have identified. Who of us hasn’t marveled at the ability of a newt to grow back its limbs after they are cut off, or of a starfish to be cut in half and regenerate to form two new starfish? Both organisms are able to do these seemingly miraculous things because of stem cells. So you can understand why some scientists are consumed with understanding and utilizing stem cells, in the hopes of slowing disease and even aging. Stem cells are special because they are versatile cells that can be prodded to develop into any type of adult cell, be it muscle, liver, nerve, etc. This makes them valuable not only for possible cell replacement therapies (for degenerative diseases like Parkinson’s), but also for the study of cell growth to learn more about the etiology of disease. If you are unfamiliar with stem cells and have a few hours to learn about them, there is a fantastic series of lectures available for free on the Howard Hughes Medical Institute’s interactive site, http://www.hhmi.org/biointeractive/lectures/.

Manipulating stem cells, however, is not easy and involves several dilemmas. A major one is: once you have one of these versatile cells, how do you get it to become what you want it to be? This is an area of continuing research, and in most cases involves finding a gene or set of genes responsible for directing the stem cell’s growth. This, once again, is not an easy task, as there are somewhere around 30,000 genes in a human cell (estimates vary).

Occasionally, however, there are successes. Dr. Edwin Monuki and colleagues at the University of California, Irvine, have identified a gene called Lhx2 that directs stem cells in early development to form the cerebral cortex. The cortex is responsible for higher-order functions in humans, such as reasoning, language, and vision. Degradation of or damage to the cortex can be very debilitating, as is seen in cases of Alzheimer’s disease or stroke. Thus, the discovery of a mechanism to turn stem cells into cortical cells has great potential to slow neurodegenerative disease or help patients recover from cerebrovascular accidents. Despite the political controversies, stem cells are one of the most promising tools we have for fighting disease and aging, although much more must be learned about them before they can fulfill our expectations. Discoveries like Dr. Monuki’s are edifying steps toward that goal.


Sleep. Memory. Pleasure. Fear. Language. We experience these things every day, but how do our brains create them? Your Brain, Explained is a personal tour around your gray matter. Building on neuroscientist Marc Dingman’s popular YouTube series, 2-Minute Neuroscience, this is a friendly, engaging introduction to the human brain and its quirks using real-life examples and Dingman’s own, hand-drawn illustrations.

  • Reading like a collection of detective stories, Your Brain, Explained combines classic cases in the history of neurology with findings stemming from the latest techniques used to probe the brain’s secrets. - Stanley Finger, PhD, Professor Emeritus of Psychological & Brain Sciences, Washington University (St. Louis), author, Origins of Neuroscience

  • Dingman weaves classic studies with modern research into easily digestible sections, to provide an excellent primer on the rapidly advancing field of neuroscience. - Moheb Costandi, author, Neuroplasticity and 50 Human Brain Ideas You Really Need to Know

  • An informative, accessible and engaging book for anyone who has even the slightest interest in how the brain works, but doesn’t know where to begin. - Dean Burnett, PhD, author, Happy Brain and Idiot Brain

  • ...a highly readable and accessible introduction to the operation of the brain and current issues in neuroscience... a wonderful introduction to the field. - Frank Amthor, PhD, Professor of Psychology, The University of Alabama at Birmingham, author, Neuroscience for Dummies


This book shows a whole other side of how brains work by examining the most unusual behavior to emerge from the human brain. In it, you'll meet a woman who is afraid to take a shower because she fears her body will slip down the drain, a man who is convinced he is a cat, a woman who compulsively snacks on cigarette ashes, and many other unusual cases. As uncommon as they are, each of these cases has something important to teach us about everyday brain function.

  • Dingman brings the history of neuroscience back to life and weaves in contemporary ideas seamlessly. Readers will come along for the ride of a really interesting read and accidentally learn some neuroscience along the way. - Erin Kirschmann, PhD, Associate Professor of Psychology & Counseling, Immaculata University

  • Through case studies of both exceptional people as well as those with disorders, Bizarre takes us on a fascinating journey in which we learn more about what is going on in our skull. - William J. Ray, PhD, Emeritus Professor of Psychology, The Pennsylvania State University, author, Abnormal Psychology

  • A unique combination of storytelling and scientific explanation that appeals to the brain novice, the trained neuroscientist, and everyone in between. Dingman explores some of the most fascinating and mysterious expressions of human behavior in a style that is case study, dramatic novel, and introductory textbook all rolled into one. - Alison Kreisler, PhD, Neuroscience Instructor, California State University, San Marcos

  • Bizarre is a collection of stories of how the brain can create zombies, cult members, extra limbs, instant musicians, and overnight accents, to name a few of the mind-scratching cases. After reading this book, you will walk away with a greater appreciation for this bizarre organ. If you are a fan of Oliver Sacks' books, you're certain to be a fan of Dingman's Bizarre. - Allison M. Wilck, PhD, Researcher and Assistant Professor of Psychology, Eastern Mennonite University