Quantcast

Latest Neural coding Stories

2011-01-24 15:46:20

Surprising rate at which neuronal networks in the cerebral cortex delete sensory information The dynamics behind signal transmission in the brain are extremely chaotic. This conclusion has been reached by scientists from the Max Planck Institute for Dynamics and Self-Organization at the University of Göttingen and the Bernstein Center for Computational Neuroscience Göttingen. In addition, the Göttingen-based researchers calculated, for the first time, how quickly information...

2011-01-17 12:19:31

When danger looms, locusts on the ground leap and fly away. The timing and precision of that leap starts with the complex coding of visual information within a single neuron. In the current edition of the journal Neuron, researchers at Baylor College of Medicine and the University of Utah uncovered three distinct features in the communication process of a sensory neuron that control distinct motor aspects of escape behavior "“ firing rate threshold, peak firing time and spike count....

2009-10-19 16:42:45

Populations of neurons code time with extreme precision in the primate brain What's new: MIT researchers have identified populations of neurons that code time with extreme precision in the primate brain. These neurons are found in two interconnected brain regions, the prefrontal cortex and the striatum, both of which are known to play critical roles in learning, movement, and thought control. Why it matters: The timing of individual actions, whether we are speaking, driving a car, or playing...

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...

2009-09-30 07:45:03

U.S. scientists say reductions in the firing rates of the brain's background nerve cells occur when monkeys intensely focus on a visual stimulus. Salk Institute researchers in La Jolla, Calif., said that finding is important because a reduction in firing rates of nerve cells not involved in the attention-demanding task contribute more to the improved attention than does the increase in firing rates of the neurons responding to the stimulus. Until now, it had been assumed an increase in the...

2009-06-24 12:17:40

U.S. scientists have determined neural noise may cause a person to miss important changes in the environment. The research was conducted by Vanderbilt University postdoctoral researcher Sam Ling and Professor Randolph Blake. We found that when the brain actively ignores the presence of an object in the environment, it does so in a way that weakens and degrades residual information about that object, Ling said. We found the brain's neural representation of an object outside your window of...

cb3690abdc9d68ad891b1f8b6c3eddbf
2008-03-08 12:30:00

Insect's sensory data tells a new story about neural networks A group of researchers has developed a novel way to view the world through the eyes of a common fly and partially decode the insect's reactions to changes in the world around it. The research fundamentally alters earlier beliefs about how neural networks function and could provide the basis for intelligent computers that mimic biological processes. In an article published in the Public Library of Science Computational Biology...

2005-09-09 18:10:00

By examining how sounds are registered during the process of learning, UC Irvine neurobiologists have discovered a neural coding mechanism that the brain relies upon to register the intensity of memories based on the importance of the experience. While neurobiologists have long hypothesized this type of neural coding, the study presents the first evidence that a "memory code" of any kind may exist. The UCI researchers believe that this code, as well as similar codes that may be discovered,...

2005-08-26 19:44:59

New Haven, Conn. - Inhibitory systems are essential for controlling the pattern of activity in the cortex, which has important implications for the mechanisms of cortical operation, according to a Yale School of Medicine study in Neuron. The findings demonstrate the inhibitory network is central to controlling not only the amplitude, extent and duration of activation of recurrent excitatory cortical networks, but also the precise timing of action potentials, and, thus, network...

2005-08-04 16:21:31

As anyone whose nerves have been jangled by a baby's howl or who have been riveted by the sight of an attractive person knows, nature has evolved sensory systems to be exquisitely tuned to relevant input. A major question in neurobiology is how neurons tune the strength of their interconnections to optimally respond to such inputs. Neuronal circuitry consists of a web of neurons, each triggering others by launching bursts of neurotransmitters at targets on receiving neurons to produce nerve...


Word of the Day
barghest
  • A goblin in English folklore, often appearing in the shape of a large dog and believed to portend imminent death or misfortune.
  • A ghost, wraith, hobgoblin, elf, or spirit.
The origin of 'barghest' is not known, but it may be from perhaps burh-ghest, town-ghost, or German Berg-geist (mountain spirit) or Bär-geist (bear-spirit).
Related