Monday, October 19, 2015

Look Up Between the Swan and the Lyre: Is Someone Watching Us?

Are these the evidence of intelligent life out there?

http://www.theatlantic.com/science/archive/2015/10/the-most-interesting-star-in-our-galaxy/410023/

Monday, October 5, 2015

Human Brains May Deal with Moment-to-Moment Emotional Awareness via Quantum Cognition

The human brain as a probability statement generator may rely on this model to avoid the fear of the reality that it may not exist in the next moment.  Moment-to-moment emotional awareness requires the "courage" to continue to take that risk while permitting our feelings to become conscious without "freaking out."  A theory of Quantum Cognition may provide a reasonable explanation of how we do that:

  • Highlights
  • •Quantum cognition models are founded on principles drawn from quantum physics.
  • •Quantum models parsimoniously address puzzling cognitive phenomena.
  • •Standard probabilistic models and quantum models are contrasted and compared.

What type of probability theory best describes the way humans make judgments under uncertainty and decisions under conflict? Although rational models of cognition have become prominent and have achieved much success, they adhere to the laws of classical probability theory despite the fact that human reasoning does not always conform to these laws. For this reason we have seen the recent emergence of models based on an alternative probabilistic framework drawn from quantum theory. These quantum models show promise in addressing cognitive phenomena that have proven recalcitrant to modeling by means of classical probability theory. This review compares and contrasts probabilistic models based on Bayesian or classical versus quantum principles, and highlights the advantages and disadvantages of each approach.





Wednesday, September 30, 2015

Mind Games: First Demonstration of Non-Invasive Human Brain-to-Brain Communication

Playing 20 Questions with the Mind: Collaborative Problem Solving by Humans Using a Brain-to-Brain Interface



We present, to our knowledge, the first demonstration that a non-invasive brain-to-brain interface (BBI) can be used to allow one human to guess what is on the mind of another human through an interactive question-and-answering paradigm similar to the “20 Questions” game. As in previous non-invasive BBI studies in humans, our interface uses electroencephalography (EEG) to detect specific patterns of brain activity from one participant (the “respondent”), and transcranial magnetic stimulation (TMS) to deliver functionally-relevant information to the brain of a second participant (the “inquirer”). Our results extend previous BBI research by (1) using stimulation of the visual cortex to convey visual stimuli that are privately experienced and consciously perceived by the inquirer; (2) exploiting real-time rather than off-line communication of information from one brain to another; and (3) employing an interactive task, in which the inquirer and respondent must exchange information bi-directionally to collaboratively solve the task. The results demonstrate that using the BBI, ten participants (five inquirer-respondent pairs) can successfully identify a “mystery item” using a true/false question-answering protocol similar to the “20 Questions” game, with high levels of accuracy that are significantly greater than a control condition in which participants were connected through a sham BBI.

Sunday, March 15, 2015

Washington Post Tabloid Journalism Challenged by Doctors

http://www.washingtonpost.com/news/to-your-health/wp/2015/02/24/lay-off-the-mega-doses-of-vitamin-d/

Physicians responding to an article sensationalizing criticism of prescribing large doses of vitamin D to correct inadequate serum levels take on the media giant.  Read the article and the comments section for an example of doctors calling out tabloid journalism designed to "frighten an already terrified citizenry."

Friday, March 13, 2015

Drug Restores Memory in Early Alzheimer's Disease

http://dgnews.docguide.com/drug-restores-brain-function-memory-early-alzheimers-disease?overlay=2&nl_ref=newsletter&pk_campaign=newsletter

Drug Restores Memory in Early Alzheimer's Disease

BALTIMORE, Md -- March 11, 2015 -- A novel therapeutic approach for an existing drug reverses a condition in elderly patients who are at high risk for dementia due to Alzheimer's disease, according to a study published this week in NeuroImage: Clinical.
Levetiracetam, commonly used to treat epilepsy, calms hyperactivity in the brain of patients with amnestic mild cognitive impairment (aMCI).
Hippocampal over-activity is well-documented in patients with aMCI and its occurrence predicts further cognitive decline and progression to Alzheimer's dementia.
“What we've shown is that very low doses of the atypical antiepileptic levetiracetam reduces this over-activity,” said Michela Gallagher, MD, Johns Hopkins University, Baltimore, Maryland. “At the same time, it improves memory performance on a task that depends on the hippocampus.”
The team studied 84 subjects; 17 of them were normal healthy participants and the rest had symptoms of aMCI. Everyone was aged older than 55 years. Patients were randomised to varying doses of levetiracetam or placebo.
The researchers found that low doses of the drug improved memory performance and normalised the over-activity detected by functional magnetic resonance imaging (fMRI) that measures brain activity during a memory task. 
“What we want to discover now, is whether treatment over a longer time will prevent further cognitive decline and delay or stop progression to Alzheimer's dementia,” said Dr. Gallagher.
SOURCE: Johns Hopkins University
Hippocampal over-activity is well-documented in patients with aMCI and its occurrence predicts further cognitive decline and progression to Alzheimer's dementia.
“What we've shown is that very low doses of the atypical antiepileptic levetiracetam reduces this over-activity,” said Michela Gallagher, MD, Johns Hopkins University, Baltimore, Maryland. “At the same time, it improves memory performance on a task that depends on the hippto varying doses of levetiracetam or placebo.
The researchers found that low doses of the drug improved memory performance and normalised the over-activity detected by functional magnetic resonance imaging (fMRI) that measures brain activity during a memory task. 
“What we want to discover now, is whether treatment over a longer time will prevent further cognitive decline and delay or stop progression to Alzheimer's dementia,” said Dr. Gallagher.
SOURCE: Johns Hopkins University

Sunday, September 7, 2014

Neuroscience of Leaders Who "Work Well With Others"

From my perspective, one of the most troublesome problems of the human species blocking the next evolutionary leap is the apparent reduction in empathy, compassion and the ability to "put oneself in another's shoes."

 During the past decade, the discovery of the "controversial" mirror-neurons in chimps, the potential of non-invasive, magnetic brain  stimulation, and the promise of empathy- enhancing substances such as oxytocin appear to be encouraging breakthroughs.

However, despite these and other physiological advances, the growing stress of living in a dangerously competitive world continues to ignite the flames of fear-based aggression among nations, cultures, races, businesses, families, groups and individuals.

 Moreover, I find it difficult to ignore the willful, self-serving fanning of those flames by powerful governments, industries, politicians and corporations and individuals who profit in many ways from the fear of difference that seems to be rampant on the planet.

 Consequently, my wish for the next advance in brain research would be the development of methods to permit populations to scientifically evaluate the brains of candidates before electing them to powerful positions of authority.

 In such a brave, new world, strength of leadership might include such characteristics as better control of impulsivity, a capacity to tolerate and understand the complexity of reality without false simplifications, better deductive reasoning and higher quality decision-making abilities. And although "even  paranoids may have real enemies," leaders should possess an enhanced capacity for actual empathy and compassion as well as an ability to quickly analyze risk and act decisively when necessary.

And while I'm dreaming, I should recommend development of a Gross National Happiness statistic to be added to the material indices we watch so carefully. It might produce data with which we could really evaluate the  value of our leaders.

Hidden Agendas in American News

More Evidence about the need for skepticism when watching news programs on TV.

  • Suboptimal facial expression primes in textual media messages: Evidence for the affective congruency effect

    Original Research Article
  • Pages 64-77
  • Niklas Ravaja, Jari Kätsyri

    Abstract

    The effectiveness of suboptimal affective primes in real media applications has remained debatable. We investigated the effects of suboptimally (at 10-ms exposure) presented facial expression primes on emotional responses to, and cognitive evaluations of, textual (business news) messages ranging from slightly unpleasant to slightly pleasant among 33 participants. Facial expression primes were presented repeatedly on a simulated small screen of a mobile device during a news reading task. Facial electromyography (EMG) recordings were used as physiological indices of positive and negative emotions. Our results showed affective congruency effects between news messages and facial expression primes: joyful facial expressions, compared to angry primes or no priming, elicited higher positive affect evaluations and more positive facial EMG responses, as well as higher interest, when embedded in affectively more positive news. On the other hand, the mere presence of suboptimal primes was detrimental to the perceived trustworthiness of news. These results suggest that embedding suboptimal facial expression primes into textual media messages may exert an influence on affectively congruent messages; at the same time, our results highlight the potential hazards and difficulties of utilizing such primes.
    Citing articles (0)

Do You Choose Your Thoughts?

NAC

http://www.plosone.org/annotation/listThread.action?root=81739


Increased Coupling of Intrinsic Networks in Remitted Depressed Youth Predicts Rumination and Cognitive Control

Rachel H. Jacobs and 
Lisanne M. Jenkins, et. al.

Published: August 27, 2014DOI: 10.1371/journal.pone.0104366


"The authors have chosen to investigate a common symptom in most individuals who experience depression as well as those who suffer from many other psychiatric conditions.  Moreover, the capacity to choose what one wishes to think about without the mood-changing interruptions of invasive rumination and obsession may be less common than previously considered in many individuals with or without a psychiatric diagnosis.

Anecdotally, my experience with N-Acetyl Cysteine  in psychiatric patients (as well as personal-development clients with rumination and obsession who carry no official psychiatric diagnosis) suggests a potentially significant beneficial effect.  It would appear that the authors have established an evaluation paradigm with which this finding might be tested.