Sentences with phrase «number of neurons did»

Not exact matches

Using a flexible mouse model, her team set out to determine whether anything could be done to restore memory «after a significant number of neurons are lost in the brain.»

«While environmental enrichment didn't seem to significantly influence the number of neurons [that were damaged],» explains Tsai, «it does induce the growth of dendrites and high numbers of synapses,» both of which are neuronal structures that underlie how brain cells communicate with one another.

Instead mice injected with stem cells developed a far greater number of synapses, or connections between neurons, at the damaged site than control mice did.

Given that there are a number of different types of neurons in the cerebral cortex and that there are many areas where the neurons do things other than help with memory, you can see how one billion is a conservative estimate I hoped would be useful for understanding the storage capacity of the human brain.

So it turns out that Karl Lashley's belief in memory as existing in a distributed network is still alive and well; Silva and Josselyn have not overturned it, only supplemented it, showing that some parts of some memories do exist in a discrete number of neurons.

«Although running induces both substantial changes in number and morphology of young neurons as well as significant changes in learning behavior, this does not prove a causal relationship,» noted Professor Bischofberger, «Nevertheless, our results, together with previous findings, suggest that the enhanced pattern separation during memory testing is most likely mediated via running - induced increase in adult neurogenesis.»

«If function is localized, with small numbers of neurons bunched together doing similar things, that's consistent with sparse coding, high selectivity, and low population spiking rates.

The MRI scans showed that obese subjects with binge eating disorder have lower grey matter volumes — a measure of the number of neurons — in the orbitofrontal cortex and striatum of the brain compared to those who do not binge eat; these brain regions are involved in keeping track of goals and rewards.

Overstreet - Wadiche and UAB colleagues posed a basic question: Since the number of neurons in the dentate gyrus increases by neurogenesis while the number of neurons in the cortex remains the same, does the brain create additional synapses from the cortical neurons to the new granule cells, or do some cortical neurons transfer their connections from mature granule cells to the new granule cells?

It has to do with their brains, specifically the number of neurons in their cerebral cortex: the «little gray cells» associated with thinking, planning and complex behavior — all considered hallmarks of intelligence.

The number of learning trials I did measured how often the neuron needed to be trained until it reached 90 % correct responses.»

NGF does not increase the number of neurons in the sympathetic ganglia by enhancing their multiplication.

Because it is the largest primate brain, it does have one distinctive feature: It has the highest number of cortical neurons of any primate.

But the number of neurons at a time with which microelectrode arrays can interface must be increased several-fold while making sure the scale - up does not cause damage to brain tissue.

For instance, when a person sees a clock, only a small number of neurons become active, enough to do pattern matching that draws upon the brain's memory of a clock and compares it with the object's basic features — its round shape, the presence of numbers — to draw a conclusion that this thing is a clock.

While Htt null KO mice do not survive to birth (Duyao et al., 1995; Nasir et al., 1995; Zeitlin et al., 1995), mice expressing a 50 % reduction of endogenous htt levels reveal cognitive and motor deficits (Nasir et al., 1995) and significant decreases in the number of neurons in globus pallidus and subthalamic nucleus (O'Kusky et al., 1999).

«Composed of roughly 100 billion neurons... the human brain is so complex that scientists have not yet found a way to record the activity of more than a small number of neurons at once, an in most cases that is done invasively with physical probes.»

Exercise did not increase progranulin protein levels in frontal cortex (B), thalamus (C), or hippocampus (D), despite producing the expected increase in the number of doublecortin - positive neurons in the dentate gyrus (E, ** p < 0.01).

Quantification of relative amounts of neurons expressing ZENK was done by estimating the total number of neurons on Nissl - stained sections in defined areas of Cluster N.

INX - 4:: GFP does not appear to be expressed in neurons implicated in locomotion, but is expressed in a number of ciliated neurons, pharyngeal m1 muscle cells, and the RIP neurons that form gap junctions with pharyngeal I1 neurons (Figure 5E).

However, in the absence of lithium, occurrence of neuronogenesis in the spinal cord of G93A mice is uncertain, and, when occurring (27), it does not produce a net increase in neuron number compared with controls.

Ultimately, researchers determined carnivores don't necessarily have more neurons than their prey and that brain size does not correlate with the number of neurons.