scholarly journals Schaffer-Specific Local Field Potentials Reflect Discrete Excitatory Events at Gamma Frequency That May Fire Postsynaptic Hippocampal CA1 Units

2012 ◽  
Vol 32 (15) ◽  
pp. 5165-5176 ◽  
Author(s):  
A. Fernandez-Ruiz ◽  
V. A. Makarov ◽  
N. Benito ◽  
O. Herreras
Keyword(s):  
Local Field ◽  
Local Field Potentials ◽  
Field Potentials ◽  
Gamma Frequency ◽  
Hippocampal Ca1

scholarly journals Local field potentials in dorsal anterior cingulate sulcus reflect rewards but not travel time costs during foraging

2019 ◽  
Vol 3 ◽  
pp. 239821281881793 ◽  
Author(s):  
Arjun Ramakrishnan ◽  
Benjamin Y. Hayden ◽  
Michael L. Platt
Keyword(s):  
Local Field ◽  
Brain Area ◽  
Local Field Potentials ◽  
Field Potential ◽  
Anterior Cingulate ◽  
Decision Variable ◽  
Field Potentials ◽  
Time Costs ◽  
Gamma Frequency ◽  
Spectral Bands

To maximise long-term reward rates, foragers deciding when to leave a patch must compute a decision variable that reflects both the immediately available reward and the time costs associated with travelling to the next patch. Identifying the mechanisms that mediate this computation is central to understanding how brains implement foraging decisions. We previously showed that firing rates of dorsal anterior cingulate sulcus neurons incorporate both variables. This result does not provide information about whether integration of information reflected in dorsal anterior cingulate sulcus spiking activity arises locally or whether it is inherited from upstream structures. Here, we examined local field potentials gathered simultaneously with our earlier recordings. In the majority of recording sites, local field potential spectral bands – specifically theta, beta, and gamma frequency ranges – encoded immediately available rewards but not time costs. The disjunction between information contained in spiking and local field potentials can constrain models of foraging-related processing. In particular, given the proposed link between local field potentials and inputs to a brain area, it raises the possibility that local processing within dorsal anterior cingulate sulcus serves to more fully bind immediate reward and time costs into a single decision variable.

Tracking of informative gamma frequency range in local field potentials of anesthetized rat olfactory bulb for odor discrimination

2022 ◽  
Vol 71 ◽  
pp. 103139
Author(s):  
Igor Shepelev ◽  
Valery Kiroy ◽  
Igor Scherban ◽  
Petr Kosenko ◽  
Alexey Smolikov ◽  
...  
Keyword(s):  
Olfactory Bulb ◽  
Local Field ◽  
Local Field Potentials ◽  
Odor Discrimination ◽  
Field Potentials ◽  
Frequency Range ◽  
Gamma Frequency

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.

scholarly journals Directional Local Field Potentials in the Subthalamic Nucleus During Deep Brain Implantation of Parkinson’s Disease Patients

2020 ◽  
Vol 14 ◽  
Author(s):  
T. A. Khoa Nguyen ◽  
Michael Schüpbach ◽  
André Mercanzini ◽  
Alain Dransart ◽  
Claudio Pollo
Keyword(s):  
Parkinson’S Disease ◽  
Parkinson's Disease ◽  
Subthalamic Nucleus ◽  
Local Field ◽  
Local Field Potentials ◽  
Field Potentials ◽  
Deep Brain
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