scholarly journals Noninvasive EEG Recordings from Freely Moving Piglets

10.3791/58226 ◽  
2018 ◽  
Author(s):  
Nora V. de Camp ◽  
Silke Dietze ◽  
Markus Klaßen ◽  
Jürgen Bergeler
Keyword(s):  
Freely Moving ◽  
Eeg Recordings

Microdialysis of Excitatory Amino Acids During EEG Recordings in Freely Moving Rats

10.3791/58455 ◽  
2018 ◽  
Author(s):  
Marie Soukupová ◽  
Chiara Falcicchia ◽  
Francesca Lovisari ◽  
Selene Ingusci ◽  
Mario Barbieri ◽  
...  
Keyword(s):  
Amino Acids ◽  
Excitatory Amino Acids ◽  
Freely Moving Rats ◽  
Freely Moving ◽  
Eeg Recordings

scholarly journals High-density EEG Recordings of the Freely Moving Mice using Polyimide-based Microelectrode

10.3791/2562 ◽  
2011 ◽  
Author(s):  
Mina Lee ◽  
Dongwook Kim ◽  
Hee-Sup Shin ◽  
Ho-Geun Sung ◽  
Jee Hyun Choi
Keyword(s):  
High Density ◽  
Freely Moving ◽  
Eeg Recordings

scholarly journals 0446 A Novel System for Enabling High-Density EEG Recordings in a Mouse

SLEEP ◽  
2020 ◽  
Vol 43 (Supplement_1) ◽  
pp. A170-A171
Author(s):  
S Thankachan ◽  
L Gerashchenko ◽  
D Gerashchenko
Keyword(s):  
Signal Generator ◽  
High Density ◽  
Electrode Arrays ◽  
Neuroscience Research ◽  
Different Types ◽  
Mems Technology ◽  
Freely Moving ◽  
Eeg Recordings ◽  
Micro Electromechanical System ◽  
Electrical Connections

Abstract Introduction Recent advances in micro-electromechanical system (MEMS) technology have promoted the development of microelectrode arrays (MEA) that allow high resolution recordings in neuroscience research. However, applying MEA in studies in freely moving mice remains very challenging due to the large number of electrical connections required in this type of studies. The use of commutators for a large number of connections is not practical, and headmounts/loggers placed on the animal head are too heavy for small animals such as mice. Therefore, there is a need for a better compact system for using MEA in mice. Herein, we designed such a system and successfully recorded high-density-EEG in freely moving mice. Methods We designed a system in which forty flexible ultrathin wires are connected to the headstage enclosed in a container held close to the mouse. The container also houses a logger and battery connected to the headstage. This recording system allows minimizing weighted pressure on the animal using a counterbalance, so that the animal can freely move in the cage. Results We tested the system using a signal generator and mouse EEG arrays (NeuroNexus). When potentials produced by the signal generator were recorded via the wires, recorded traces were indistinguishable from the traces that were recorded when the signal generator was connected directly to the logger. We then implanted mice with EEG electrode arrays under surgical anesthesia. The high-density EEG recordings were performed one and four weeks after the surgery. High-quality EEG signals were observed in all the channels of the 32-channel logger (SpikeGadgets) in freely moving mice. Conclusion We successfully developed and tested a novel system for enabling high-density EEG recordings in freely moving mice. We expect that this system will be useful for recording biopotentials from different types of MEA in freely moving mice. Support NIH 1R43OD023231 (LG), NIH 1RF1AG061774 (DG), and NIH 5R21NS106406 (DG)

A Comparative study on secure routing algorithms SAODV and A-SAODV in Mobile AdHoc Networks (MANET) – The Enhancements of AODV

2012 ◽  
Vol 3 (2) ◽  
pp. 419-423
Author(s):  
JARUPULA RAJESHWAR ◽  
Dr G NARSIMHA
Keyword(s):  
Routing Protocol ◽  
Routing Protocols ◽  
Dynamic Network ◽  
Secure Routing ◽  
Mobile Adhoc Networks ◽  
Security Challenges ◽  
Basic Protocol ◽  
Freely Moving ◽  
Adhoc Networks ◽  
Secure Routing Protocols

A freely moving nodes forming as group to communicate among themselves are called as Mobile AdHoc Networks (MANET). Many applications are choosing this MANET for effective commutation due to its flexible nature in forming a network. But due to its openness characteristics it is posing many security challenges. As it has highly dynamic network topology security for routing is playing a major role. We have very good routing protocols for route discovery as well as for transporting data packers but most of them lack the feature of security like AODV. In this paper we are studying the basic protocol AODV and identify how it can be made secure. We are studying a protocol S-AODV which is a security extension of AODV which is called Secure AODV (S-AODV) and we are studying enhanced version of S-AODV routing protocol a Adaptive Secure AODV (A-SAODV). Finally we have described about the parameter to be taken for performance evaluation of different secure routing protocols

Efficient but less mobilized monitoring system in individuals with high aggressive predispositions

2019 ◽  
Author(s):  
Fanny Grisetto ◽  
Yvonne N. Delevoye-Turrell ◽  
Clémence Roger
Keyword(s):  
Cognitive Control ◽  
Monitoring System ◽  
Congruency Effect ◽  
Performance Monitoring ◽  
Simon Task ◽  
Aggressive Behaviors ◽  
Eeg Recordings ◽  
Global Reduction

Aggressive behaviors in pathological and healthy populations have been largely related to poor cognitive control functioning. However, few studies investigated the influence of aggressive traits (i.e., aggressiveness) on cognitive control. In the current study, we investigated the effects of aggressiveness on cognitive control abilities and particularly, on performance monitoring. Thirty-two participants performed a Simon task while electroencephalography (EEG) and electromyography (EMG) were recorded. Participants were classified as high and low aggressive using the BPAQ questionnaire (Buss & Perry, 1992). EMG recordings were used to reveal three response types by uncovering small incorrect muscular activations in ~15% of correct trials (i.e., partial-errors) that have to be distinguished from full-error and pure-correct responses. For these three response types, EEG recordings were used to extract fronto-central negativities indicative of performance monitoring, the error and correct (-related) negativities (ERN/Ne and CRN/Nc). Behavioral results indicated that the high aggressiveness group had a larger congruency effect compared to the low aggressiveness group, but there were no differences in accuracy. EEG results revealed a global reduction in performance-related negativities amplitudes in all the response types in the high aggressiveness group compared to the low aggressiveness group. Interestingly, the distinction between the ERN/Ne and the CRN/Nc components was preserved both in high and low aggressiveness groups. In sum, high aggressive traits did not affect the capacity to self-evaluate erroneous from correct actions but are associated with a decrease in the importance given to one’s own performance. The implication of these findings are discussed in relation to pathological aggressiveness.

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