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Le cerveau à tous les niveaux

Le cerveau à tous les niveaux

http://lecerveau.mcgill.ca/

Related:  NeuroNeuroscienceNeuroBio and neurosciencesComment fonctionne le CORPS & LE CERVEAU ?Neuroscience

Untitled Document Publications In press · Leclercq, A.L., Majerus, S., & Maillart, C. (2013). The Impact of Lexical Frequency on Sentence Comprehension in Children with Specific Language Impairment. Science 2.0 Researchers from the UC San Diego School of Medicine and the Dana-Farber Cancer Institute believe they have uncovered a new aspect of autism - that proteins involved in autism interact with many more partners than previously known. These interactions had not been detected earlier because they involve alternatively spliced forms of autism genes found in the brain. In their study, the scientists isolated hundreds of new variants of autism genes from the human brain, and then screened their protein products against thousands of other proteins to identify interacting partners. Proteins produced by alternatively-spliced autism genes and their many partners formed a biological network that produced an unprecedented view of how autism genes are connected.

neuroscience - Neuromediator, Neuromodulator, Neurotransmitter? Neurotransmitters were classically the most specific in terms of demands on experimental demonstration (thus, the so-called "classical neurotransmitter") but the chief role of neurotransmitter is direct neuron-to-neuron communication via the synaptic cleft in which the post-synaptic neuron has channels that readily engage the neurotransmitter. Classical neurotransmitters also require inactivation and are stored in vesicles in the presynaptic terminal (while under the modern definition, these last two requirements aren't as strict, allowing peptides and gasses like NO to be considered a neurotransmitter). Neuromodulators, are more of an extra-synaptic application... a bath in the extracellular medium that modulates the excitability of a population of cells. In this regard,neurotransmitters can be considered neuromodulators when their action is on channels outside of the synaptic cleft.

Fall Prevention and Music Therapy Primary Outcome Measures: Pretest and posttest scores will be collected for ten treatment conditions at three post-treatment times (10 minutes, 1 week, and 1 month) Falls are a serious health issue and are the greatest cause of death in the elderly. The use of music therapy in fall prevention has not been reported in the literature. This investigation will provide experimental support to the assumption that music therapy may prevent falls and that certain music can affect increases in postural stability using randomly selected subjects, validated posturography and a full experimental design.

Lucid Dreamers Show Better Self-Reflecting Capabilities When Awake The ability to control what happens in one's dreams is an endearing prospect, so much so that there are pages of information online which supposedly help individuals achieve this curious state, which is known as lucid dreaming. Despite being a well-recognized phenomenon, we still know very little about it, nor why some people seem to experience it more frequently than others. Now, a new study by scientists at the Max Planck Institute has offered some novel insight into the subject with the finding that a particular brain region known to be involved in self-reflection is larger in lucid dreamers. Bilingual Aphasia Test (BAT) | How to put together a stimulus book | Individual language tests | Language-pair specific tests | How to construct a bilingual aphasia test | Bat screening test | References | e-Bat | The Bilingual Aphasia Test (BAT) was designed to assess each of the languages of a bilingual or multilingual individual with aphasia in an equivalent way. The various versions of the BAT are thus not mere translations of each other, but culturally and linguistically equivalent tests.

Brain rhythm predicts ability to sleep through a noisy night Ever wonder why some people can sleep through just about anything, while others get startled awake at each and every bump in the night? People who have trouble sleeping in noisy environments often resort to strategies like earplugs or noise-cancelling headphones that muffle the sound, but a new study from investigators at Massachusetts General Hospital (MGH) may lead to ways to block disturbing sounds within the brain. In their report in the August 10 issue of Current Biology, the team reports finding a brain-wave pattern, reflecting activity of a key structure, that predicts the ease at which sleep can be disrupted by noise. "We wanted to investigate what the brain does to promote stable sleep, even in the face of noise, and why some people are better at staying asleep than others," explains Jeffrey Ellenbogen, MD, chief of the MGH Division of Sleep Medicine.

Stages of Sleep Stages of Sleep PDF version for Printing One of the most pervasive misconceptions about sleep is that sleep is just a matter of our bodies "turning off" for several hours, followed by our bodies "turning back on" when we awake. In short most of us think of sleep as a passive and relatively constant and unchanging process.

Beta movement The beta movement is an optical illusion, first described by Max Wertheimer in 1912,[1] whereby a series of static images on a screen creates the illusion of a smoothly flowing scene. This occurs when the frame rate is greater than 10 to 12 separate images per second. It might be considered similar to the effects of animation. The static images do not physically change but give the appearance of motion because of being rapidly changed faster than the eye can see. This optical illusion is caused by the fact that the human optic nerve responds to changes in light at about 10 cycles per second,[citation needed] so changes about double of this are registered as motion instead of being separate distinct images.

New Brain Map Reveals Unknown Cell Types Researchers have produced a detailed map of brain cells and the genes that are active within them. Their work, published in Science this week, even revealed a handful of previously unknown types of cells. In mammals, the cerebral cortex plays a role in cognitive functions like memory and social behaviors, and these all rely on a variety of cell types: from neurons and their protective glial cells to blood vessel cells. There are about 100 million cells in a mouse brain, and 65 billion cells in a human brain. A Swedish team led by Jens Hjerling-Leffler and Sten Linnarsson of Karolinska Institutet wanted to create a more detailed brain map that could help us better understand how brain cells respond to diseases and injuries. Using a technique called single cell sequencing, they were able to classify the cells in the mouse somatosensory cortex and hippocampal CA1 region.

Constraint-Induced Language Therapy for Aphasia The following is excerpted from the article "Constraint-Induced Language Therapy for Aphasia," Stroke Connection Magazine, March/April 2006 (Last science update March 2013) Constraint-induced therapies (CIT) have received a good deal of attention in the popular press recently. An early researcher, Dr. Edward Taub, examined the notion that much of the long-term disability of stroke survivors resulted from a learned tendency to avoid using the impaired arm and hand, instead of focusing on compensating by using the remaining good limb. Taub proposed the term “learned non-use” to describe this process by which the survivor increasingly avoids using the impaired limb and is thus unable to capitalize on the value this limb might offer.

Cognition Laboratory Experiments Here is a small set of experiments designed for my cognitive psychology class. There are many sets of cognitive psychology experiment available. What is unique about these is the combination of their being web deliverable and that the parameters of the experiment can be adjusted by you. I will add instructions pages when I get. If you have any suggestions for variables that you would like me to add to my experiment, please email me. If I add your suggested variable, I will acknowledge you on the instruction page for the experiment.

Rapid eye movement sleep "Sentinel hypothesis" redirects here. For the unrelated "Sentinel" space probe concept popularized by Arthur C. Clarke, see Bracewell probe. EEG of a mouse. REM sleep is characterized by prominent theta-rhythm Allan Snyder Allan Whitenack Snyder is the director of the Centre for the Mind at the University of Sydney, Australia where he also holds the 150th Anniversary Chair of Science and the Mind. He is a co-founder of Emotiv Systems and winner of the International Australia Prize in 1997 and the Marconi Prize in 2001 for his contributions to optical physics. Allan is also the Creator and Chairman of the What Makes a Champion? forum, an official Olympic cultural event first held at the Sydney 2000, then Beijing 2008 and forthcoming London 2012 Olympic Games. Nelson Mandela and John Howard opened the 2000 event.

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