scholarly journals Real-time estimation and biofeedback of single-neuron firing rates using local field potentials

2014 ◽  
Vol 5 (1) ◽  
Author(s):  
Thomas M. Hall ◽  
Kianoush Nazarpour ◽  
Andrew Jackson
Keyword(s):  
Real Time ◽  
Local Field ◽  
Single Neuron ◽  
Local Field Potentials ◽  
Time Estimation ◽  
Field Potentials ◽  
Neuron Firing ◽  
Firing Rates ◽  
Real Time Estimation

Concomitant Single Neuron Activity, Local Field Potentials, and Cerebral Microdialysis in Neurosurgical Patients

Neurosurgery ◽  
1998 ◽  
Vol 43 (3) ◽  
pp. 706-706 ◽  
Author(s):  
Itzhak Fried ◽  
Eric Behnke ◽  
Nigel Maidment ◽  
Anatole Bragin ◽  
Katherine MacDonald ◽  
...  
Keyword(s):  
Local Field ◽  
Single Neuron ◽  
Local Field Potentials ◽  
Cerebral Microdialysis ◽  
Neuron Activity ◽  
Field Potentials ◽  
Neurosurgical Patients ◽  
Single Neuron Activity

Real-time seizure prediction from local field potentials using an adaptive Wiener algorithm

2010 ◽  
Vol 40 (1) ◽  
pp. 97-108 ◽  
Author(s):  
P. Rajdev ◽  
M.P. Ward ◽  
J. Rickus ◽  
R. Worth ◽  
P.P. Irazoqui
Keyword(s):  
Real Time ◽  
Local Field ◽  
Local Field Potentials ◽  
Seizure Prediction ◽  
Field Potentials

scholarly journals Responses to Natural Scenes in Cat V1

2003 ◽  
Vol 90 (3) ◽  
pp. 1910-1920 ◽  
Author(s):  
Christoph Kayser ◽  
Rodrigo F. Salazar ◽  
Peter König
Keyword(s):  
Local Field ◽  
Visual Processing ◽  
Activity Patterns ◽  
Local Field Potentials ◽  
Natural Scenes ◽  
Field Potentials ◽  
Stimulus Motion ◽  
Large Variability ◽  
Firing Rates ◽  
Natural Stimuli

Studies on processing in primary visual areas often use artificial stimuli such as bars or gratings. As a result, little is known about the properties of activity patterns for the natural stimuli processed by the visual system on a daily basis. Furthermore, in the cat, a well-studied model system for visual processing, most results are obtained from anesthetized subjects and little is known about neuronal activations in the alert animal. Addressing these issues, we measure local field potentials (lfp) and multiunit spikes in the primary visual cortex of awake cats. We compare changes in the lfp power spectra and multiunit firing rates for natural movies, movies with modified spatio-temporal correlations as well as gratings. The activity patterns elicited by drifting gratings are qualitatively and quantitatively different from those elicited by natural stimuli and this difference arises from both spatial as well as temporal properties of the stimuli. Furthermore, both local field potentials and multiunit firing rates are most sensitive to the second-order statistics of the stimuli and not to their higher-order properties. Finally, responses to natural movies show a large variability over time because of activity fluctuations induced by rapid stimulus motion. We show that these fluctuations are not dependent on the detailed spatial properties of the stimuli but depend on their temporal jitter. These fluctuations are important characteristics of visual activity under natural conditions and impose limitations on the readout of possible differences in mean activity levels.

scholarly journals Gating of attentional effort through the central thalamus

2013 ◽  
Vol 109 (4) ◽  
pp. 1152-1163 ◽  
Author(s):  
N. D. Schiff ◽  
S. A. Shah ◽  
A. E. Hudson ◽  
T. Nauvel ◽  
S. F. Kalik ◽  
...  
Keyword(s):  
Task Performance ◽  
Local Field ◽  
Spectral Power ◽  
Local Field Potentials ◽  
Delay Period ◽  
Field Potentials ◽  
Short Term ◽  
Thalamic Neurons ◽  
Firing Rates ◽  
Central Thalamus

The central thalamus plays an important role in the regulation of arousal and allocation of attentional resources in the performance of even simple tasks. To assess the contribution of central thalamic neurons to short-term adjustments of attentional effort, we analyzed 166 microelectrode recordings obtained from two rhesus monkeys performing a visuomotor simple reaction time task with a variable foreperiod. Multiunit responses showed maintained firing rate elevations during the variable delay period of the task in ∼24% of recording sites. Simultaneously recorded local field potentials demonstrated significant decreases in power at ∼10–20 Hz and increases in power at 30–100 Hz during the delay period when compared against precue baselines. Comparison of the spectral power of local field potentials during the delay period of correct and incorrect trials showed that, during incorrect trials, similar, but reduced, shifts of spectral power occurred within the same frequency bands. Sustained performance of even simple tasks requires regulation of arousal and attention that combine in the concept of “attentional effort”. Our findings suggest that central thalamic neurons regulate task performance through brief changes in firing rates and spectral power changes during task-relevant short-term shifts of attentional effort. Increases in attentional effort may be reflected in changes within the central thalamic local populations, where correct task performance associates with more robust maintenance of firing rates during the delay period. Such ongoing fluctuations of central thalamic activity likely reflect a mix of influences, including variations in moment-to-moment levels of motivation, arousal, and availability of cognitive resources.

scholarly journals Modelling unitary fields and the single‐neuron contribution to local field potentials in the hippocampus

2020 ◽  
Vol 598 (18) ◽  
pp. 3957-3972 ◽  
Author(s):  
Maria Teleńczuk ◽  
Bartosz Teleńczuk ◽  
Alain Destexhe
Keyword(s):  
Local Field ◽  
Single Neuron ◽  
Local Field Potentials ◽  
Field Potentials
Sign in / Sign up

Export Citation Format

Share Document