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Showing 1 to 13 of 13 for “"electrocorticography (ECoG)"”.
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Neural Adaptation and the Effect of Interelectrode Spacing on Epidural Electrocorticography for Brain-Computer Interfaces
Electrocorticography: ECoG) is increasingly being identified as a safe and reliable recording technique for both Brain-Computer Interface: BCI) applications as well as neurophysiology studies. This thesis describes some of the first real-time closed-loop BCI studies of chronic ECoG in non-human …
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Reading Your Own Mind: Dynamic Visualization of Real-Time Neural Signals
… these opportunities for the specific case of Electrocorticography: ECoG) recordings from clinical epilepsy patients. First, queued patient tasks were used to explore the predictive nature of both local and global features of the ECoG signal. Second, an algorithm was developed and tested for …
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Phase- and amplitude-coupling are tied by an intrinsic spatial organization but show divergent stimulus-related changes
… bands during a cue-based motor task using electrocorticography (ECoG) in 18 patients (8 females) undergoing presurgical monitoring. Significant correspondence between the spatial pattern of PhC and AmpC was detected during stimulus processing across all subjects and frequency bands (R≈0.50 …
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Temporal Dynamics of Endogenous and Stimulus-Driven Attention: Combined ECoG/fMRI Studies
… to localization of their seizure foci using electrocorticography (ECoG), electrodes placed directly on the cortical surface. We subsequently recorded cortical physiology from the ECoG electrodes during a spatial attention task, involving both goal-driven and stimulus-driven attention, and …
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Reinforcement Learning Describes the Computational and Neural Processes Underlying Flexible Learning of Values and Attentional Selection
… In the third project, I used intracranial electrocorticography (ECoG) in a proof-of-principle study to reveal spectral power signatures in vmPFC related to the expected values of stimuli predicted by a RL model for a single human subject.
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The Use of High-Density ECoG for Functional Mapping and Neural Decoding
… for optimizing survival and quality of life. Electrocorticography (ECoG) can map functional areas without delivering electrical current to the cortex by placing electrodes directly onto the cortex. Traditional clinical grid electrodes generally have large inter-electrode distance of 1 cm. The …
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Investigating The Neural Basis of Audiovisual Speech Perception With Intracranial Recordings In Humans
… intracranial electrodes, a technique known as electrocorticography (ECoG). First, I studied responses to noisy speech in the auditory cortex, specifically in the superior temporal gyrus (STG). Previous studies identified the anterior parts of the STG as unisensory, responding only to auditory …
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Multi-Modality Assessment Of Language Function
… functional modality employed is task-related electrocorticography (ECoG). This is complemented by discussion and evaluation of previously published functional magnetic resonance imaging (fMRI) data. Language-related structure is explored using diffusion-weighted magnetic resonance imaging in …
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ECoG correlates of visuomotor transformation, neural plasticity, and application to a force-based brain computer interface
<p>Electrocorticography: ECoG) has gained increased notoriety over the past decade as a possible recording modality for Brain-Computer Interface: BCI) applications that offers a balance of minimal invasiveness to the patient in addition to robust spectral information over time. More recently, the …
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Engineering Low Noise Organic Electrochemical Transistors for Electrophysiology Applications
… action potentials. The application of OECTs in electrocorticography (ECoG) recordings was also explored. By using devices that consisted of both transistors and electrodes, we collected and compared the quality of epidural recordings. OECTs were found to outperform electrodes and the quality of …
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A comparison of imaging modalities and decoding methods for detecting semantic information in the brain
… (2) to assess and compare the capacities of electrocorticography (ECoG) and 7 tesla functional magnetic resonance imaging (7T-fMRI) to detect semantic representations; and (3) to evaluate the strengths and limitations of multivariate analysis methods, in particular methods based on …
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Network Dynamics of Visual Object Recognition
<p>Visual object recognition is the principal mechanism by which humans and many animals interpret their surroundings. Despite the complexity of neural computation required, object recognition is achieved with such rapidity and accuracy that it appears to us almost effortless. Extensive human and …
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Anatomical and Functional Organization of Domain-General Brain Regions
How does complex brain activity organize thought and behaviour? Theoretical proposals have long emphasized that intelligent behaviour must be supported by a flexible control system. Numerous brain imaging studies identified a domain-general or “multiple-demand” (MD) brain system co-activated …