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Tag: "pulses" at biology news

2 brains -- 1 thought

..."firing" of nerve cells, when they send electrical pulses - like a Morse code - to other cells of the brain. This process depends on the exact dynamics of the neuronal activity. When the brain receives sensory input, calculates or remembers, it processes information encoded in a series of neuronal impulses ...

How the brain's backup system compensates for stroke

...r experiments, O'Shea and colleagues used magnetic pulses to temporarily and harmlessly disrupt function in ...tivity. The researchers found that the magnetic pulses to the left PMd briefly disrupted the subjects' performance on the task, but that performance quickl...

Catching cancer's spread by watching hemoglobin

...at different wavelengths (colors) send ultra-short pulses (lasting only a femtosecond, or a quadrillionth of a second) on a blood vessel. The hemoglobin absorbs light from both of these lasers at the same time, in a process known as "two-photon absorption," and then gives off signals that can be detected to...

How brain pacemakers erase diseased messages

... stimulation administered by rapid-fire electrical pulses deep in the brain produces what they call an "info...itious and therefore meaningless message, constant pulses overwhelm the erratic bursts of brain activity characteristic of disease. "Periodic bursts in the...

Electric fish conduct electric duets in aquatic courtship

...chniques for separating and documenting electrical pulses based on sex. They video recorded four pair of mating mormyrids (a feat in itself, since the species rarely breeds successfully in captivity) and identified nine common motor displays and 11 specific pulse sequences common to courtship and mating. ...

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