News tagged with human brain
(Medical Xpress)—The instability of "white matter" in humans may contribute to greater cognitive decline during the aging of humans compared with chimpanzees, scientists from Yerkes National Primate Research ...
Neuroscience May 14, 2013 | 5 / 5 (3) | 2 |
Human intelligence cannot be explained by the size of the brain's frontal lobes, say researchers.
Neuroscience May 13, 2013 | 4.9 / 5 (9) | 4 |
(Medical Xpress)—When brain cells are overwhelmed by an influx of too many calcium molecules, they shut down the channels through which these molecules enter the cells. Until now, the "stop" signal mechanism that cells ...
Neuroscience May 09, 2013 | 5 / 5 (4) | 0 |
A laugh may signal mockery, humor, joy or simply be a response to tickling, but each kind of laughter conveys a wealth of auditory and social information. These different kinds of laughter also spark different connections ...
Neuroscience May 08, 2013 | 5 / 5 (1) | 0 |
Alzheimer's disease is characterized by the accumulation of neurotoxic β-amyloid peptide (A-beta). ADAM10, a protein that resides in the neural synapses, has previously been shown to prevent the formation of A-beta.
Alzheimer's disease & dementia May 08, 2013 | not rated yet | 0
(Medical Xpress)—How does San Francisco Giants slugger Pablo Sandoval swat a 95 mph fastball, or tennis icon Venus Williams see the oncoming ball, let alone return her sister Serena's 120 mph serves? For ...
Neuroscience May 08, 2013 | 3.2 / 5 (6) | 0 |
A key type of human brain cell developed in the laboratory grows seamlessly when transplanted into the brains of mice, UC San Francisco researchers have discovered, raising hope that these cells might one day be used to treat ...
Medical research May 08, 2013 | 5 / 5 (2) | 0 |
(Medical Xpress)—With a goal of helping patients with spinal cord injuries, Jason Gallivan and a team of researchers at Queen's University's Department of Psychology and Centre for Neuroscience Studies are probing deep ...
Neuroscience May 08, 2013 | not rated yet | 0
Scientists at the Virginia Tech Carilion Research Institute have discovered how the predominant class of Alzheimer's pharmaceuticals might sharpen the brain's performance.
Neuroscience May 07, 2013 | 4.5 / 5 (2) | 0 |
(Medical Xpress)—You may be more than a single number, according to a team of Western-led researchers. Considered a standard gauge of intelligence, an intelligence quotient (IQ) score doesn't actually provide ...
Psychology & Psychiatry May 07, 2013 | 3.1 / 5 (26) | 28 |
(Medical Xpress)—A global team of researchers has identified the gene behind an Australian toddler's paediatric brain disorder in a discovery that is paving the way for the diagnosis and treatment of other ...
Genetics May 03, 2013 | 4.5 / 5 (2) | 1 |
Medical researchers have manipulated human stem cells into producing types of brain cells known to play important roles in neurodevelopmental disorders such as epilepsy, schizophrenia and autism. The new model cell system ...
Medical research May 02, 2013 | 5 / 5 (2) | 0 |
A study in The Journal of General Physiology presents new methods to evaluate how astrocytes contribute to brain function, paving the way for future exploration of these important brain cells at unprecede ...
Medical research Apr 29, 2013 | not rated yet | 0
This past weekend teams from the National Football League used statistics like height, weight and speed to draft the best college players, and in a few weeks, armchair enthusiasts will use similar measures ...
Neuroscience Apr 29, 2013 | 4 / 5 (5) | 0 |
"Eat your veggies" has been an admonition of parents through the ages, but newly published brain research from the University of Georgia provides one of the best reasons why.
Health Apr 26, 2013 | 4 / 5 (1) | 1
The human brain is the center of the human nervous system and is a highly complex organ. Enclosed in the cranium, it has the same general structure as the brains of other mammals, but is over three times as large as the brain of a mammal with an equivalent body size. Most of the expansion comes from the cerebral cortex, a convoluted layer of neural tissue that covers the surface of the forebrain. Especially expanded are the frontal lobes, which are involved in executive functions such as self-control, planning, reasoning, and abstract thought. The portion of the brain devoted to vision is also greatly enlarged in humans.
Brain evolution, from the earliest shrewlike mammals through primates to hominids, is marked by a steady increase in encephalization, or the ratio of brain to body size. The human brain has been estimated to contain 50–100 billion (1011) neurons, of which about 10 billion (1010) are cortical pyramidal cells. These cells pass signals to each other via approximately 100 trillion (1014) synaptic connections.
In spite of the fact that it is protected by the thick bones of the skull, suspended in cerebrospinal fluid, and isolated from the bloodstream by the blood-brain barrier, the delicate nature of the human brain makes it susceptible to many types of damage and disease. The most common forms of physical damage are closed head injuries such as a blow to the head, a stroke, or poisoning by a wide variety of chemicals that can act as neurotoxins. Infection of the brain is rare because of the barriers that protect it, but is very serious when it occurs. More common are genetically based diseases, such as Parkinson's disease, multiple sclerosis, and many others. A number of psychiatric conditions, such as schizophrenia and depression, are widely thought to be caused at least partially by brain dysfunctions, although the nature of such brain anomalies is not well understood.
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