scholarly journals Non-Invasive Estimates of Local Field Potentials for Brain-Computer Interfaces: Theoretical Derivation and Comparison with Direct Intracranial Recordings

10.5772/5243 ◽  
2008 ◽  
Author(s):  
Rolando Grave de Peralta Menendez ◽  
Sara L. Gonzalez Andino
Keyword(s):  
Local Field ◽  
Local Field Potentials ◽  
Brain Computer Interfaces ◽  
Field Potentials ◽  
Theoretical Derivation ◽  
Non Invasive ◽  
Computer Interfaces ◽  
Intracranial Recordings

Automatic bad channel detection in implantable brain-computer interfaces using multimodal features based on local field potentials and spike signals

2020 ◽  
Vol 116 ◽  
pp. 103572
Author(s):  
Mengmeng Li ◽  
You Liang ◽  
Lifang Yang ◽  
Haofeng Wang ◽  
Zhongliang Yang ◽  
...  
Keyword(s):  
Local Field ◽  
Local Field Potentials ◽  
Brain Computer Interfaces ◽  
Field Potentials ◽  
Channel Detection ◽  
Computer Interfaces ◽  
Multimodal Features ◽  
Spike Signals

scholarly journals Volitional control of single-electrode high gamma local field potentials by people with paralysis

2019 ◽  
Vol 121 (4) ◽  
pp. 1428-1450 ◽  
Author(s):  
Tomislav Milekovic ◽  
Daniel Bacher ◽  
Anish A. Sarma ◽  
John D. Simeral ◽  
Jad Saab ◽  
...  
Keyword(s):  
Motor Cortex ◽  
Local Field ◽  
Action Potentials ◽  
Local Field Potentials ◽  
Control Individual ◽  
Brain Computer Interfaces ◽  
Field Potentials ◽  
Volitional Control ◽  
Computer Interfaces ◽  
High Gamma

Intracortical brain-computer interfaces (BCIs) can enable individuals to control effectors, such as a computer cursor, by directly decoding the user’s movement intentions from action potentials and local field potentials (LFPs) recorded within the motor cortex. However, the accuracy and complexity of effector control achieved with such “biomimetic” BCIs will depend on the degree to which the intended movements used to elicit control modulate the neural activity. In particular, channels that do not record distinguishable action potentials and only record LFP modulations may be of limited use for BCI control. In contrast, a biofeedback approach may surpass these limitations by letting the participants generate new control signals and learn strategies that improve the volitional control of signals used for effector control. Here, we show that, by using a biofeedback paradigm, three individuals with tetraplegia achieved volitional control of gamma LFPs (40–400 Hz) recorded by a single microelectrode implanted in the precentral gyrus. Control was improved over a pair of consecutive sessions up to 3 days apart. In all but one session, the channel used to achieve control lacked distinguishable action potentials. Our results indicate that biofeedback LFP-based BCIs may potentially contribute to the neural modulation necessary to obtain reliable and useful control of effectors. NEW & NOTEWORTHY Our study demonstrates that people with tetraplegia can volitionally control individual high-gamma local-field potential (LFP) channels recorded from the motor cortex, and that this control can be improved using biofeedback. Motor cortical LFP signals are thought to be both informative and stable intracortical signals and, thus, of importance for future brain-computer interfaces.

scholarly journals Removal of Electrocardiogram Artifacts From Local Field Potentials Recorded by Sensing-Enabled Neurostimulator

2021 ◽  
Vol 15 ◽  
Author(s):  
Yue Chen ◽  
Bozhi Ma ◽  
Hongwei Hao ◽  
Luming Li
Keyword(s):  
Adaptive Filtering ◽  
Local Field ◽  
Local Field Potentials ◽  
Advanced Technology ◽  
Field Potentials ◽  
Ecg Signals ◽  
Computer Interfaces ◽  
Recording Conditions ◽  
Electrocardiogram Ecg ◽  
Ecg Artifacts

Sensing-enabled neurostimulators are an advanced technology for chronic observation of brain activities, and show great potential for closed-loop neuromodulation and as implantable brain-computer interfaces. However, local field potentials (LFPs) recorded by sensing-enabled neurostimulators can be contaminated by electrocardiogram (ECG) signals due to complex recording conditions and limited common-mode-rejection-ratio (CMRR). In this study, we propose a solution for removing such ECG artifacts from local field potentials (LFPs) recorded by a sensing-enabled neurostimulator. A synchronized monopolar channel was added as an ECG reference, and two pre-existing methods, i.e., template subtraction and adaptive filtering, were then applied. ECG artifacts were successfully removed and the performance of the method was insensitive to residual stimulation artifacts. This approach to removal of ECG artifacts broadens the range of applications of sensing-enabled neurostimulators.

scholarly journals Sound identification in human auditory cortex: Differential contribution of local field potentials and high gamma power as revealed by direct intracranial recordings

2015 ◽  
Vol 148 ◽  
pp. 37-50 ◽  
Author(s):  
Kirill V. Nourski ◽  
Mitchell Steinschneider ◽  
Ariane E. Rhone ◽  
Hiroyuki Oya ◽  
Hiroto Kawasaki ◽  
...  
Keyword(s):  
Auditory Cortex ◽  
Local Field ◽  
Local Field Potentials ◽  
Field Potentials ◽  
High Gamma ◽  
Gamma Power ◽  
Human Auditory Cortex ◽  
Intracranial Recordings ◽  
Differential Contribution

scholarly journals Non-invasive estimation of local field potentials for neuroprosthesis control

2005 ◽  
Vol 6 (1) ◽  
pp. 59-64 ◽  
Author(s):  
Rolando Grave de Peralta Menendez ◽  
Sara Gonz�lez Andino ◽  
Lucas Perez ◽  
Pierre W. Ferrez ◽  
Jos� del R. Mill�n
Keyword(s):  
Local Field ◽  
Local Field Potentials ◽  
Field Potentials ◽  
Non Invasive

Combined measurements of cerebellar blood flow, local field potentials and glucose utilization during climbing fibres stimulation: Effect of postsynaptic excitatory activity

2005 ◽  
Vol 25 (1_suppl) ◽  
pp. S192-S192
Author(s):  
Aïcha Douhou ◽  
Kirsten Caesar ◽  
Nikolas Offenhauser ◽  
Martin Lauritzen ◽  
Gilles Bonvento
Keyword(s):  
Blood Flow ◽  
Local Field ◽  
Glucose Utilization ◽  
Local Field Potentials ◽  
Field Potentials ◽  
Climbing Fibres ◽  
Excitatory Activity ◽  
Combined Measurements

scholarly journals Altered Emotional Phenotypes in Chronic Kidney Disease Following 5/6 Nephrectomy

2021 ◽  
Vol 11 (7) ◽  
pp. 882
Author(s):  
Yeon Hee Yu ◽  
Seong-Wook Kim ◽  
Dae-Kyoon Park ◽  
Ho-Yeon Song ◽  
Duk-Soo Kim ◽  
...  
Keyword(s):  
Chronic Kidney Disease ◽  
Kidney Disease ◽  
Local Field ◽  
Smooth Muscle Actin ◽  
Local Field Potentials ◽  
Renal Tissue ◽  
Field Potentials ◽  
Wild Type ◽  
Sprague Dawley ◽  
Rat Models

Increased prevalence of chronic kidney disease (CKD) and neurological disorders including cerebrovascular disease, cognitive impairment, peripheral neuropathy, and dysfunction of central nervous system have been reported during the natural history of CKD. Psychological distress and depression are serious concerns in patients with CKD. However, the relevance of CKD due to decline in renal function and the pathophysiology of emotional deterioration is not clear. Male Sprague Dawley rats were divided into three groups: sham control, 5/6 nephrectomy at 4 weeks, and 5/6 nephrectomy at 10 weeks. Behavior tests, local field potentials, and histology and laboratory tests were conducted and investigated. We provided direct evidence showing that CKD rat models exhibited anxiogenic behaviors and depression-like phenotypes, along with altered hippocampal neural oscillations at 1–12 Hz. We generated CKD rat models by performing 5/6 nephrectomy, and identified higher level of serum creatinine and blood urea nitrogen (BUN) in CKD rats than in wild-type, depending on time. In addition, the level of α-smooth muscle actin (α-SMA) and collagen I for renal tissue was markedly elevated, with worsening fibrosis due to renal failures. The level of anxiety and depression-like behaviors increased in the 10-week CKD rat models compared with the 4-week rat models. In the recording of local field potentials, the power of delta (1–4 Hz), theta (4–7 Hz), and alpha rhythm (7–12 Hz) was significantly increased in the hippocampus of CKD rats compared with wild-type rats. Together, our findings indicated that anxiogenic behaviors and depression can be induced by CKD, and these abnormal symptoms can be worsened as the onset of CKD was prolonged. In conclusion, our results show that the hippocampus is vulnerable to uremia.

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