Whatever you do, don’t think of a white bear. Go on, close your eyes, relax, but don’t think of a white bear… So, what happened? Most likely, you were overwhelmed by thoughts of a white bear. This mini-experiment highlights the fascinating paradox of thought suppression. That is, once we explicitly try not to think of something, we find that we think about it all the time. Indeed, in its worse forms, the failure of thought suppression mars the minds of those suffering from various psychological disorders, such as post-traumatic stress disorder (PTSD), attention deficit hyperactivity disorder (ADHD), obsessive-compulsive disorder (OCD), and even depression. Read more →

In the mid 1950s, Dr. Bedford reported on a number of older adults who exhibited cognitive problems (memory or planning or being able to sustain attention) following surgery where anesthesia was used. This effect is now called postoperative cognitive dysfunction (or decline; POCD). POCD typically lasts for a few months to a year with a small minority of patients exhibiting permanent decline. Studies about it were few at first, with most focusing on cognition following cardiac surgery. Over time and especially more recently, there has been an increase in research of POCD following non-cardiac surgeries (e.g., abdominal or orthopedic) as well as continued interest in POCD following cardiac surgery. Read more →

All human societies have some phenomenon that can be described as religion. It is difficult to understand why religion is so pervasive in human culture. Some theories suggest that religion is a byproduct of evolution. However, no other animal group has anything that even remotely resembles the concept that has been labeled as religion in anthropology. Unlike other social animals, humans are very good at establishing and maintaining relations with agents beyond a physical presence. From childhood, humans are capable of forming enduring, stable and important social relationships with fictional characters, imaginary friends and super heroes. Thus, for humans, it is not difficult to imagine a god who is although invisible and intangible, yet somehow involved with them. Religious thoughts are based on tacit assumptions, when people proclaim their loyalty to a particular faith, they subscribe to claims for which there is no evidence. Unlike conscious beliefs, which differ widely from one tradition to another, such tacit assumptions about religious beliefs are very similar across religions. Read more →

Perhaps the most personal and most quintessentially human aspect of our existence is the experience of our ‘self.’ What contemporary philosopher Daniel Dennett has described as the unitary narration of our experience, the ‘author’ of our life. Artists, writers, philosophers and psychologists dedicate much of their attention to describing and discerning the kernels of the self. And now, cognitive neuroscientists have entered the debate. With the recent advent of brain imaging technologies, researchers now have a tool to take a stab at this fundamental, though esoteric, question. Read more →

The human brain undergoes rapid development from late gestation to early childhood. The brain structures that are developing or undergoing age-related changes are more vulnerable to the effects of stress. Trauma at different time points in an individual’s life might be associated with different outcomes, depending on the brain structure that was affected at the time of exposure to adversity. Read more →

Welcome to the forty-seventh edition of Brain Blogging. In this round, we discuss whether science is in need of another cognitive revolution, how to reinforce our cognition, how reduced hippocampal neurogenesis correlates with depression, and other topics.

Remember, we review the latest blogs related to the brain and mind that go beyond the basic sciences into a more human and multidimensional perspective. You can check out our archive for past editions. Read more →