Sentences with phrase «neuron firing rate»

A plane's normal line has no polarity, but each semicircular canal can be rotated in a direction that provides an increase in afferent neuron firing rate (excitatory direction) or it may be rotated in the opposite direction to produce a decrease in afferent neuron firing rate (inhibitory direction).

Intrigued by recent findings that neuron firing rates in the regions of mouse and fly brains associated with visual processing increase during physical activity, UC Santa Barbara psychologists Barry Giesbrecht and Tom Bullock wanted to know if the same might be true for the human brain.

Not exact matches

Different neurons fired at different rates depending on what he imagined performing.»

After isolating sensory neurons from frogs and eels, Adrian showed that as the intensity of a sensory stimulus increases, so does a neuron's firing rate, which can peak at 200 spikes per second.

Wolf Singer of the Max Planck Institute for Brain Research, in Frankfurt, supports a code involving synchronous oscillations, or many neurons firing at both the same rate and the same time.

In hundreds of trials, the monkeys» reaction times varied from roughly 150 to 400 milliseconds, and the response time depended on how fast the neurons increased their firing rate to a level that seemed to trigger the eye movement.

«In the absence of sound, neurons fire randomly and at a high rate,» says Burger.

During the day, however, BK channels have little effect on neuron excitability in the SCN, even though one might expect the increase in neuronal firing rate to increase BK activation.

Now, scientists have discovered a key component of this ancient navigational system in rats: a group of neurons called «speed cells» that alter their firing rates with the pace at which the rodents run.

According to this Mental Synthesis Theory, the subject's brain will trigger an increased firing rate in both object neurons and, more importantly, a synchronization of their activities would occur.

«We could stimulate a neuron to fire and control the rate of propagation of the electrical impulse.»

By monitoring the «firing rate» of each neuron, they were able to assess which smells elicited the strongest reactions from the flies.

«These results were unexpected and contradicted the current dogma in the field stating that individual neurons can regulate their own firing rates in an autonomous manner,» said Dr. Slutsky.

In collaboration with Prof. Eli Nelken of Hebrew University and Dr. Michael Slutsky of Mantis Vision, Slomowitz found that the network returned to its original firing rate over the course of two days despite the continued presence of the drug — and even though the firing rates and patterns of individual neurons did not reflect homeostatic tendencies.

Just as computers use programming languages such as Java, the brain seems to have its own operating languages — a bewildering set of codes hidden in the rates and timing with which neurons fire as well as the rhythmic electrical activities that oscillate through brain circuits.

After isolating sensory neurons from frogs and eels, Adrian showed that as the intensity of a sensory stimulus increases, so does a neuron's firing rate, which can peak as high as 200 spikes per second.

Neuroimaging studies showed that such triggers set off an electrical wave of firing neurons that spread over the occipital cortex at a rate of several millimeters per minute.

Pramiracetam affects the EEG patterns of aged rats, and increases the firing rates of acetylcholine - producing neurons.

When she attached two electrodes to the neurons — one to stimulate the nerve, the other to record the response — she discovered that the neurons» firing rate was abnormally high.

They learned that neurons in this central location ramp up firing rates, peaking just before a divergent behavior occurs.

How can changing the firing rate of the same neurons in one region lead to different effects on the rest of the brain?

To mimic a learning experience and see how neurons keep their activity in check, each team tweaked rat or mouse neurons» firing rates, genetically or with drugs.

The researchers knew that neurons fire at a steady rate to form memories but also that new experiences can overstimulate them.

If - adaptation is strong, such that the neuron adapts out the increased baseline intensity of the stimulus, then the firing rate should exceed about as often in the noisy conditions as in the clean condition.

«These R2 neurons have higher firing rates the more sleep - deprived the fruit flies were and firing of these neurons puts flies to sleep, suggesting that we've identified the key cells responsible for sleep drive,» says Wu.

Previous studies in the mouse BACHD model (6 month old), reported an age - dependent increase in mean firing rate of GP neurons and decrease in the mean firing rate of STN neurons in vitro (D.J. Surmeier, Northwestern Univ.) and in vivo (James Tepper, Rutgers Univ.).

«If we get the timing right, we believe we can decrease the firing rates of neurons at the tinnitus frequency, and target those with hyperactivity,» says Shore.

Expression of mutant Htt appeared to alter the firing rate of STN neurons, as firing rates in HET and HOM mice were lower than their WT littermate.

A single bolus IV injection of MP - 10 at all doses studied (0.18, 0.52, and 1.5 mg / kg) produced a clear increase in the firing rate of STN neurons in both WT and TG rats.

In the past, people had known that individual neurons go through phases of being more or less active, but with this probe they saw for the first time that all the neurons in a given column cycled together between firing very rapidly then firing at a much slower rate, similar to coordinated cycles in sleep.

The firing rate of STN neurons appeared to be more sensitive to the presence of mHtt, with lower firing rates in HET and HOM mice compared to WT counterparts; however there was no change in mean firing rate difference found for GP neurons between WT and HET.

The lack of rate difference in GP could either stem from less sensitivity of GP neurons to IP dysfunction, or could be due to GP heterogeneity in firing rate and pattern that makes detection of abnormalities in single unit activity harder in GP than STN.

This shift of perspective invites a change of approach: instead of charting average firing rates of single neurons, we must infer behaviorally relevant neural codes from evolving activity patterns across neural populations.

Previously, many researchers had thought that the firing rate of single neurons in the prefrontal cortex, the brain's executive, is the major player in working memory.

Again, researchers previously thought that these functions had mostly to do with the firing rates of neurons.

Three different activity measures were used to quantify the magnitude of the saccade - related bursts of SC neurons for movements towards the center of their movement field as a function of their rostral - to - caudal location in the SC motor map: A) number of spikes in the burst, B) mean firing rate and C) peak spike density.

When the head rotates, inertial drag of endolymph within the duct acts upon sensory hair cells that modulate the firing rates of primary vestibular afferent neurons.

Spontaneous firing rates in Q175Het mice showed a modest increase in both SNr and GP neurons compared to the WT but did not reach statistical significance.

At any given moment only a few neurons at any location are actually firing at any appreciable firing rate, and so you're representing the world at any given time with a relatively small number of active components.

We demonstrate this intuition by applying three different information - based measures of stimulus encoding to experimental characterizations of sensory neurons, and demonstrate a transition from «high - slope» to «peak - firing - rate» encoding as neuronal variability increases, both for single neurons and in the context of a small population.

Here, θ0 is the wind direction value that elicits the maximum average firing rate and differs by 90 ° for each of the four neurons.

The standard tool in performing this characterization is the neuronal tuning curve: a plot of the average firing rate of the neuron as a function of relevant stimulus parameters.

For example, researchers are looking at how inflammation decreases the firing rate of neurons in the frontal lobe of the brain in people with depression.