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2014-04-25 10:04:46

Much-needed tool for neuroscience emerges after years of work Nearly a decade ago, the era of optogenetics was ushered in with the development of channelrhodopsins, light-activated ion channels that can, with the flick of a switch, instantaneously turn on neurons in which they are genetically expressed. What has lagged behind, however, is the ability to use light to inactivate neurons with an equal level of reliability and efficiency. Now, Howard Hughes Medical Institute (HHMI) scientists...

2014-04-04 11:00:50

For Simon Gilroy, sometimes seeing is believing. In this case, it was seeing the wave of calcium sweep root-to-shoot in the plants the University of Wisconsin-Madison professor of botany is studying that made him a believer. Gilroy and colleagues, in a March 24, 2014 paper in the Proceedings of the National Academy of Sciences, showed what long had been suspected but long had eluded scientists: that calcium is involved in rapid plant cell communication. It's a finding that has...

2014-04-01 15:11:54

KIT computer models explain how ion channels in cell membranes react to light / light switch for nerve cells as a sensitive tool of research Networked nerve cells are the control center of organisms. In a nematode, 300 nerve cells are sufficient to initiate complex behavior. To understand the properties of the networks, re-searchers switch cells on and off with light and observe the resulting behavior of the organism. In the Science journal, sci-entists now present a protein that...

2014-02-19 11:02:44

Using multidisciplinary approach, researchers in Italy and Connecticut provide unprecedented glimpse of what happens to the heart during a heart attack A team of researchers at the University of Florence in Italy and the University of Connecticut Health Center have used a multidisciplinary approach to provide an unprecedented glimpse of what happens to the heart during an "infarction" -- a heart attack -- by looking at how the attack affects electrical activity and calcium release in heart...

Understanding The Link Between Age And Decreased Maximum Heart Rate
2013-10-15 07:29:52

[ Watch the Video: Link Between Age And Decreased Maximum Heart Rate ] April Flowers for redOrbit.com - Your Universe Online As we age, our maximum heart rate (maxHR) decreases, limiting the performance of aging athletes. Decreased maxHR is also a leading cause for nursing home admittance for otherwise-healthy elderly individuals who no longer have the physical capacity required for independent living. Until now, however, the reasons for decreased maxHR due to age have been unclear....

2013-07-19 16:07:01

Researchers of the Department of Biosystems Science and Engineering of ETH Zurich were able to measure the speed of neuronal signal conduction along segments of single axons in neuronal cultures by using a high-resolution electrical method. The bioengineers are now searching for plausible explanations for the large conduction speed variations. To write this little piece of text, the brain sends commands to arms and fingers to tap on the keyboard. Neuronal cells with their cable-like...

Stem Cells To Aid In Heart-Related Research
2012-06-21 07:17:08

Connie K. Ho for redOrbit.com Pumping vigorously night and day, the heart is clearly one of the most important organs in the human body. It is also one of the most delicate parts of the body. As such, news regarding heart-related diseases is beneficial to both doctors and patients. University of Michigan (UM) researchers recently reported the discovery of a new method that could produce cardiac muscle patches from stem cells. The innovative process was created at UM´s Center for...

2012-03-21 14:04:30

Researchers identify the novel expression of an ion channel in neurons of the brain Research at the University of Calgary's Hotchkiss Brain Institute (HBI) has demonstrated the novel expression of an ion channel in Purkinje cells — specialized neurons in the cerebellum, the area of the brain responsible for movement. Ray W. Turner, PhD, Professor in the Department of Cell Biology & Anatomy and PhD student Jordan Engbers and colleagues published this finding in the January edition...

2012-02-20 15:02:27

In two landmark papers in the journal Nature this week, scientists at The Scripps Research Institute report that they have identified a class of proteins that detect "painful touch." Scientists have known that sensory nerves in our skin detect pressure, pain, heat, cold, and other stimuli using specialized "ion channel" proteins in their outer membranes. They have only just begun, however, to identify and characterize the specific proteins involved in each of these sensory pathways. The...

2012-02-01 14:08:22

Researchers reveal a novel mechanism through which the brain may become more reluctant to function as we grow older New findings, led by neuroscientists at the University of Bristol and published this week in the journal Neurobiology of Aging, reveal a novel mechanism through which the brain may become more reluctant to function as we grow older. It is not fully understood why the brain's cognitive functions such as memory and speech decline as we age. Although work published this year...


Word of the Day
jument
  • A beast of burden; also, a beast in general.
'Jument' ultimately comes from the Latin 'jugum,' yoke.
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