Monday, 17 December 2012
Neurogenesis and Depression
The processes leading to the many different illnesses that can affect people’s psychic equilibrium are still hotly debated. Often, these processes involve multiple contributing factors which is why there are so many different hypotheses about them. In the case of depression, for example, one of the best known is the monoamine hypothesis, which associates the disease with underactivity of certain neurotransmitters. such as serotonin.
Several research laboratories are now working on a more recent hypothesis about the cause of depression, involving a phenomenon that was first confirmed in humans in the late 1990s: neurogenesis, meaning the birth of new neurons in the adult brain. The starting point for this hypothesis is that these young neurons seem to show greater plasticity and are found only in certain parts of the brain, such as the dentate gyrus of the hippocampus, that are associated with emotions. (more…)
Memory and the Brain, Mental Disorders | Comments Closed
Monday, 10 December 2012
Two Systems of Thought in a Single Brain?
The idea that the human mind uses more than one kind of reasoning mechanism is very old. In fact, this notion has always been part of our attempts to understand the architecture of the mind. The dual-process theories that are current today follow this long tradition. Simply put, these theories hold that two major types of cognitive processes coexist in the human brain: one that is fast, automatic, and unconscious, and another that is slower, more flexible, and requires conscious control. (more…)
From Thought to Language, The Emergence of Consciousness | 1 comment
Monday, 3 December 2012
Your Brain Likes Nature Better Than E-Mail
In the early summer of 2010, five neuroscientists spent a week all on their own, rafting and camping along the San Juan River in a remote area of southern Utah, in the United States. Nothing so special about that—plenty of people make these kinds of wilderness expeditions nowadays.
What made this adventure different was that these scientists gave themselves two additional challenges. Knowing that workaholism tends to come with their profession, they decided to spend the entire week without their cell phones and laptop computers. And being neuroscientists, they decided to observe their own reactions to this deprivation and thereby try to shed light on their own hypotheses about how daily use of these technologies may be changing the ways that people think and behave. (more…)
The Emergence of Consciousness | Comments Closed
Tuesday, 27 November 2012
Links on How Memory Works (continued)
Research on human memory is such an important aspect of cognitive neuroscience today that a tremendous number of articles about memory research can be found on the Internet. So this week, I am continuing last week’s list of new links to articles about various aspects of how memory works—one of the sub-topics covered under the topic Memory and the Brain in The Brain from Top to Bottom. For each link, I provide a brief description of the article in question.
(For more background on how I compile these lists, see my earlier post on Links About Brain Anatomy.) (more…)
Memory and the Brain | Comments Closed
Thursday, 22 November 2012
Links on How Memory Works
This week, as I have before in this blog, I am posting a set of new links to other web sites that discuss a subject covered in The Brain from Top to Bottom. For each link, I also provide a brief description of the content on the site in question.
The subject this week is the sub-topic How Memory Works, under the topic Memory and the Brain. Research on human memory is such an important aspect of cognitive neuroscience today that the number of links on this topic on the Internet is enormous. I have therefore divided my selected links into two groups; I am posting 11 links here this week and will post another 11 next week. (more…)
Memory and the Brain | Comments Closed
