News tagged with nerve impulses

Related topics: nerve cells

New knowledge about the human brain's plasticity

The brain's plasticity and its adaptability to new situations do not function the way researchers previously thought, according to a new study published in the journal Cell. Earlier theories are based on lab ...

Nov 06, 2014
popularity 3.8 / 5 (5) | comments 1

The brain's forgotten glial cells

For a long time, researchers have neglected the 100 million glial cells found in our brains, but that is no longer the case. Now they have discovered that the glial cells cleanse the brain of waste.

Oct 10, 2014
popularity 5 / 5 (7) | comments 2

Controlling our circadian rhythms

Most people have experienced the effects of circadian-rhythm disruption, after traveling across time zones or adjusting to a new schedule. To have any hope of modulating our biological "clocks," to combat ...

Nov 25, 2013
popularity 3.5 / 5 (2) | comments 0

Schizophrenia: It's in the wiring of the brain

Just as wires must be insulated to effectively carry electrical impulses, nerve cells must be insulated by myelin to effectively transmit neural impulses. Using typical magnetic resonance imaging or MRI, one can visually ...

Sep 16, 2013
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Sleep boosts production of brain support cells

Sleep increases the reproduction of the cells that go on to form the insulating material on nerve cell projections in the brain and spinal cord known as myelin, according to an animal study published in the ...

Sep 03, 2013
popularity 4.8 / 5 (4) | comments 0 | with audio podcast

Putting the brakes on pain

Neuropathic pain—pain that results from a malfunction in the nervous system—is a daily reality for millions of Americans. Unlike normal pain, it doesn't go away after the stimulus that provoked it ends, and it also behaves ...

Aug 05, 2013
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The secret lives, and deaths, of neurons

As the human body fine-tunes its neurological wiring, nerve cells often must fix a faulty connection by amputating an axon—the "business end" of the neuron that sends electrical impulses to tissues or other ...

May 23, 2013
popularity 5 / 5 (3) | comments 0 | with audio podcast

Action potential

An action potential (or nerve impulse) is a transient alteration of the transmembrane voltage (or membrane potential) across an excitable membrane generated by the activity of voltage-gated ion channels embedded in the membrane. Action potentials play multiple roles in several types of excitable cells such as neurons, myocytes, and electrocytes. The best known action potentials are pulse-like waves of voltage that travel along axons of neurons.

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