The world might seem a little grayer than usual when we’re down in the dumps and we often talk about “feeling blue” — new research suggests that the associations we make between emotion and color go beyond mere metaphor. The results of two studies indicate that feeling sadness may actually change how we perceive color. Specifically, researchers found that participants who were induced to feel sad were less accurate in identifying colors on the blue-yellow axis than those who were led to ........ Read more »
The 2015 U.S. Tennis Open is in full swing and I ran into an interesting recent manuscript summarizing fatigue in tennis.Fatigue has multiple elements including changes in muscle performance, blood markers of lactic acid and other compounds as well as brain central perception factors.Long multi-set matches can last four or five hours. Obviously, at the end of this type of exertion, players have had to adjust to effects of significant fatigue.Reid and Duffield review the key elements of fatigue i........ Read more »
Reid M, & Duffield R. (2014) The development of fatigue during match-play tennis. British journal of sports medicine. PMID: 24668384
Everyone dreams - even people who believe that they "never dream" and can't remember any of their dreams. That's according to a group of French researchers writing in the Journal of Sleep Research: Evidence that non-dreamers do dream.
In questionnaire surveys, up to 6.5% of people report that they 'never dream'. Although most of these people report having dreamed at some point in the past, roughly 1 in every 250 people say that they can't remember ever dreaming - not even once.
But... Read more »
Herlin B, Leu-Semenescu S, Chaumereuil C, & Arnulf I. (2015) Evidence that non-dreamers do dream: a REM sleep behaviour disorder model. Journal of sleep research. PMID: 26307463
What makes someone better at switching between different tasks? Looking for the mechanisms behind cognitive flexibility, researchers have used brain scans to shed new light on this question. By studying networks of activity in the brain’s frontal cortex, a region associated with control over thoughts and actions, the researchers have shown that the degree to which these networks reconfigure themselves while switching from task to task predicts people’s cognitive flexibility.... Read more »
Uddin LQ, Supekar KS, Ryali S, & Menon V. (2011) Dynamic reconfiguration of structural and functional connectivity across core neurocognitive brain networks with development. The Journal of neuroscience : the official journal of the Society for Neuroscience, 31(50), 18578-89. PMID: 22171056
People with hostile personality traits who watch more television than their peers may be at a greater risk for injury, potentially because they are more susceptible to the influence of television on violence and risk-taking behaviors, a University of Pittsburgh Graduate School of Public Health analysis discovered.... Read more »
Fabio, A., Chen, C., Dearwater, S., Jacobs, D., Erickson, D., Matthews, K., Iribarren, C., Sidney, S., & Pereira, M. (2015) Television viewing and hostile personality trait increase the risk of injuries. International Journal of Injury Control and Safety Promotion, 1-10. DOI: 10.1080/17457300.2015.1061560
It seems like everyone is running around buying school supplies and books, registering for classes, and fretting about how hard it is going to be to learn another whole year’s worth of stuff. The secret to success, it turns out, may lie in cow dung.A cow pie. Photo taken by Jeff Vanuga at the USDA available at Wikimedia Commons.Recent research has highlighted the important role that microbes living in animal digestive tracts have on host animals’ health and behavior. This influence of our gu........ Read more »
Matthews, D., & Jenks, S. (2013) Ingestion of Mycobacterium vaccae decreases anxiety-related behavior and improves learning in mice. Behavioural Processes, 27-35. DOI: 10.1016/j.beproc.2013.02.007
Lowry, C., Hollis, J., de Vries, A., Pan, B., Brunet, L., Hunt, J., Paton, J., van Kampen, E., Knight, D., Evans, A.... (2007) Identification of an immune-responsive mesolimbocortical serotonergic system: Potential role in regulation of emotional behavior. Neuroscience, 146(2), 756-772. DOI: 10.1016/j.neuroscience.2007.01.067
Cats on a treadmill. From Treadmill Kittens.It's been an eventful week. The 10th Anniversary of Hurricane Katrina. The 10th Anniversary of Optogenetics (with commentary from the neuroscience community and from the inventors). The Reproducibility Project's efforts to replicate 100 studies in cognitive and social psychology (published in Science). And the passing of the great writer and neurologist, Oliver Sacks. Oh, and Wes Craven just died too...I'm not blogging about any of these events. Many ........ Read more »
Bottari, D., Troje, N., Ley, P., Hense, M., Kekunnaya, R., & Röder, B. (2015) The neural development of the biological motion processing system does not rely on early visual input. Cortex, 359-367. DOI: 10.1016/j.cortex.2015.07.029
Over the past decade, functional neuroimaging has revealed that our brains go through ever-changing patterns of activity, whether we are active or at rest, healthy or sick, under legal medication or high on illegal drugs. Yet this dynamic activity takes place over the comparatively fixed anatomical grid of neuronal connections; the functional weights of those connections therefore must be changing over time. Bratislav Misic, Marc G. Berman and their colleagues, from the Rotman Research Institute........ Read more »
Mišić, B., Fatima, Z., Askren, M., Buschkuehl, M., Churchill, N., Cimprich, B., Deldin, P., Jaeggi, S., Jung, M., Korostil, M.... (2014) The Functional Connectivity Landscape of the Human Brain. PLoS ONE, 9(10). DOI: 10.1371/journal.pone.0111007
A creepy case report in the journal Neurocase describes a man who came to believe that his reflection was another person who lived behind the mirror.
The patient, Mr. B., a 78-year-old French man, was admitted to the neurology department in Tours:
During the previous 10 days, Mr. B. reported the presence of a stranger in his home who was located behind the mirror of the bathroom and strikingly shared his physical appearance. The stranger was a double of himself: he was the same size,... Read more »
Diard-Detoeuf, C., Desmidt, T., Mondon, K., & Graux, J. (2015) A case of Capgras syndrome with one’s own reflected image in a mirror. Neurocase, 1-2. DOI: 10.1080/13554794.2015.1080847
Are there areas of the cerebral cortex purely devoted to vision? Or can the "visual" cortex, under some conditions, respond to sounds? Two papers published recently address this question.
First off, Micah Murray and colleagues of Switzerland discuss The multisensory function of primary visual cortex in humans in a review paper published in Neuropsychologia.
They criticize the conventional view that the primary visual cortex (in the occipital lobe) is little more than a reception point ... Read more »
Bedny M, Richardson H, & Saxe R. (2015) "Visual" Cortex Responds to Spoken Language in Blind Children. The Journal of neuroscience : the official journal of the Society for Neuroscience, 35(33), 11674-81. PMID: 26290244
Murray MM, Thelen A, Thut G, Romei V, Martuzzi R, & Matusz PJ. (2015) The multisensory function of primary visual cortex in humans. Neuropsychologia. PMID: 26275965
MedicalResearch.com Interview with: Dr. Eric Reiman MD Executive Director, Banner Alzheimer’s Institute (BAI) Chief Executive Officer, Banner Research Clinical Director of the Neurogenomics Division at the Translational Genomics Research Institute (TGen) Professor of Psychiatry, University of Arizona Director, Arizona Alzheimer’s … Continue reading →
The post Many Patients with Clinical Alzheimer’s Do Not Have Significant Amyloid Pathology appeared first on MedicalResearch.com ........ Read more »
Dr. Eric Reiman MD. (2015) Many Patients with Clinical Alzheimer’s Do Not Have Significant Amyloid Pathology. MedicalResearch.com. info:/
There are many examples throughout nature of microorganisms like bacteria, viruses, and parasites influencing the neurobiology and behavior of their hosts. For example, the rabies virus enters the nervous system almost immediately after a bite or scratch and travels to the brain, where it influences neural activity to make aggressive behavior more likely. This, of course, is beneficial for the virus as it increases the probability its infected host will make contact with another susceptible host........ Read more »
Cryan, J., & Dinan, T. (2012) Mind-altering microorganisms: the impact of the gut microbiota on brain and behaviour. Nature Reviews Neuroscience, 13(10), 701-712. DOI: 10.1038/nrn3346
Scientists who analyzed the genes involved in 10 autoimmune diseases that begin in childhood have discovered 22 genome-wide signals shared by two or more diseases. These shared gene sites may reveal potential new targets for treating many of these diseases, in some cases with existing drugs already available for non-autoimmune disorders.... Read more »
Yun R Li,, Jin Li,, Sihai D Zhao,, Jonathan P Bradfield,, Frank D Mentch,, S Melkorka Maggadottir,, Cuiping Hou,, Debra J Abrams,, Diana Chang,, Feng Gao,.... (2015) Meta-analysis of shared genetic architecture across ten pediatric autoimmune diseases. Nature Medicine. DOI: http://.org/10.1038/nm.3933
It's a question that many people struggle with and has great implications for the study of our species: are men and women more alike than different or more different than alike, and what differences exist between the sexes?... Read more »
If men take up more of the child-care duties, splitting them equally with their female partners, heterosexual couples have more satisfaction with their relationships and their sex lives, according to new research by sociologists. The group used data from more than 900 heterosexual couples’ responses in the 2006 Marital Relationship Study (MARS).... Read more »
Daniel Fowler et al. (2015) Couples That Split Childcare Duties Have Higher Quality Relationships and Sex Lives . American Sociological Association. info:other/Link
The hippocampus in the brain’s temporal lobe is responsible for more than just long-term memory. Researchers have for the first time demonstrated that it is also involved in quick and successful conflict resolution.... Read more »
C.R. Oehrn, C. Baumann, J. Fell, H. Lee, H. Kessler, U. Habel, S. Hanslmayr, & N. Axmacher. (2015) Human hippocampal dynamics during response conflict. Current Biology. info:/10.1016/j.cub.2015.07.032
Having friends who suffer from depression doesn’t affect the mental health of others, according to research. The team found that having friends can help teenagers recover from depression or even avoid becoming depressed in the first instance. The findings are the result of a study of the way teenagers in a group of US high schools influenced each others’ mood. The academics used a mathematical model to establish if depression spreads from friend to friend.... Read more »
E. M. Hill, F. E. Griffiths, & T. House. (2015) Spreading of healthy mood in adolescent social networks. Proceedings of the Royal Society B. info:/10.1098/rspb.2015.1180
You see a man at the grocery store. Is that the fellow you went to college with or just a guy who looks like him? One tiny spot in the brain has the answer. Neuroscientists have identified the part of the hippocampus that creates and processes this type of memory, furthering our understanding of how the mind works, and what’s going wrong when it doesn’t.... Read more »
Lee, H., Wang, C., Deshmukh, S., & Knierim, J. (2015) Neural Population Evidence of Functional Heterogeneity along the CA3 Transverse Axis: Pattern Completion versus Pattern Separation. Neuron. DOI: 10.1016/j.neuron.2015.07.012
How scientists study the effects of marijuana on the brain is changing. Until recently marijuana research largely excluded tobacco users from its participant pool, but scientists have found reason to abandon this practice, uncovering significant differences in the brains of individuals who use both tobacco and marijuana and the brains of those who only use marijuana.... Read more »
Filbey, F., McQueeny, T., Kadamangudi, S., Bice, C., & Ketcherside, A. (2015) Combined effects of marijuana and nicotine on memory performance and hippocampal volume. Behavioural Brain Research, 46-53. DOI: 10.1016/j.bbr.2015.07.029
New research confirmed that sleep disturbances significantly contribute to MS-related fatigue, a common and often disabling symptom among individuals with MS. Review of the pertinent literature showed that sleep may be the dominant factor in fatigue in MS. This was also the finding in Dr. Strober’s study of 107 employed individuals with MS of whom 61% reported poor sleep.... Read more »
Strober, L. (2015) Fatigue in Multiple Sclerosis: A Look at the Role of Poor Sleep. Frontiers in Neurology. DOI: 10.3389/fneur.2015.00021
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