Quantcast

Latest Action potential Stories

2010-10-26 02:50:03

Scientists are closer to solving one of the many mysteries of multiple sclerosis and other demyelinating diseases, thanks to a recent study conducted at the Salk Institute for Biological Studies. The research revealed a previously unknown connection between two ion channels, which, when misaligned, can cause the many bizarre symptoms that characterize the condition. The findings, reported in this week's online edition of the Proceedings of the National Academy of Sciences (PNAS), provide...

2010-09-27 08:55:29

(Ivanhoe Newswire) -- Scientists have uncovered a source of damage associated with multiple sclerosis (MS) that may lead them to an effective therapy for what is now an incurable condition. The research revealed a direct interaction between immune cells and neurons that plays a significant role in neuronal injury and may respond to therapeutic intervention. MS is a disease in which a person's own immune system attacks their central nervous system. Symptoms vary, depending on which nerves are...

2010-09-23 13:22:10

Researchers in Germany have gained new insight into how the immune system causes damage associated with multiple sclerosis (MS), an incurable neuroinflammatory disorder. Using imaging tools which enable investigation of processes in living organisms, they were able to show a direct interaction between immune cells and neurons which plays a significant role in neuronal injury. However, this direct interaction may respond to therapeutic intervention. The study by Dr. Volker Siffrin and...

efd571a49429d42c1a4750bf1d5f6f981
2010-05-05 16:00:00

Max Planck scientists use a genetic light source to measure brain signals Electrical currents are invisible to the naked eye - at least they are when they flow through metal cables. In nerve cells, however, scientists are able to make electrical signals visible. Working with fellow experts from Switzerland and Japan, scientists from the Max Planck Institute for Medical Research in Heidelberg successfully used a specialized fluorescent protein to visualize electrical activity in neurons of...

2010-02-16 15:37:37

Ion channels traditionally thought to work independently actually work in sync Investigators in the Hotchkiss Brain Institute, Faculty of Medicine, have made a major breakthrough in our understanding of nerve impulse generation within the brain. Brain cells communicate with each other by firing electrical impulses, which in turn rely upon special ion channels that are positioned at strategic locations in their membranes. This exciting, new foundational research was published this week in the...

2010-02-11 09:36:09

Application of Neurotoxins of Cone Snails and Spiders Neurotoxins from cone snails and spiders help neurobiologists Sebastian Auer, Annika S. Strzebecher and Dr. Ines Ibañez-Tallon of the Max Delbrck Center for Molecular Medicine (MDC) Berlin-Buch, Germany, to investigate the function of ion channels in neurons. Ion channels in the cell membrane enable cells to communicate with their environment and are therefore of vital importance. The MDC researchers have developed a...

f8bdb0fbf2707865f821bd69e07a26c51
2009-10-22 14:29:21

Trying to understand the complex workings of a biological cell by teasing out the function of every molecule within it is a daunting task. But by making synthetic cells that include just a few chemical processes, researchers can study cellular machinery one manageable piece at a time. A new paper* from researchers at Yale University and the National Institute of Standards and Technology (NIST) describes a highly simplified model cell that not only sheds light on the way certain real cells...

2009-10-14 13:22:18

Our brains, it turns out, are eco-friendly. A study published in Science and reviewed by F1000 Biology members Venkatesh Murthy and Jakob Sorensen reveals that our brains have the amazing ability to be energy efficient. Brain cells generate and propagate nerve impulses, or action potentials, by controlling the flow of positive sodium and potassium ions in and out of the cells. Re-establishing the ion equilibrium after an action potential requires energy. The amount of energy needed for action...

2009-09-25 00:31:58

A U.S. researcher suggests his myelin model -- based on a sheat the covers nerve axons -- is cause for rethinking Alzheimer's disease. George Bartzokis of the University of California, Los Angeles, says present drug targets -- the amyloid-beta peptide and the tau peptide implicated in Alzheimer's as well as clinical signs such as memory loss -- are actually preceded by the breakdown of myelin. Bartzokis explains myelin -- the fatty sheath covering the nerve axons, allowing for efficient...

2009-09-15 08:46:09

Dendrites integrate thousands of inputs locally before sending signals to central axon A tiny neuron is a very complicated structure. Its complex network of dendrites, axons and synapses is constantly dealing with information, deciding whether or not to send a nerve impulse, to drive a certain action. It turns out that neurons, at one level, operate like another complicated structure -- the United States, particularly its system of electing a president, through the Electoral College. A new...


Word of the Day
mundungus
  • A stinking tobacco.
  • Offal; waste animal product; organic matter unfit for consumption.
This word comes from the Spanish 'mondongo,' tripe, entrails.