When the function depends on a single variable, we say the signal to be one dimensional. If the signal is a function of a single independent variable, the signal called a one-dimensional signal. A speech signal is an example of a one-dimensional signal whose amplitude varies with time, ...
The abnormal EEG picture of proband. Epileptiform discharges with sharp wave (marked with a red circle) over the right frontal area were revealed. The amplitude was 93.8 μV and the timing was 82 ms Full size image Before the infant received effective treatment, he experienced 9 times focal ...
Positron emission tomography (PET) is a functional imaging technique, meaning it can measure the metabolic activity of cells with an unprecedented sensitivity. Established applications are the diagnosis and staging of cancer, neurological diseases, such as Alzheimer’s, and cardiac diseases [1]. Due ...
Amplitude, duration and SNR of each IIS class were: 7.2 渭V, 72 ms and 16.5 dB for M class; 36.1 渭V, 78.1 ms and 22 dB for M + NC class; 10 渭V, 87.1 ms and 17.7 dB for NC class. Mesial brain sources contribute to surface EEG. Contrary to several hypothesis, mesial temporal...
of the front end and which trigger thresholds need to be applied to trigger on a specific signal amplitude. More precisely, the distance of the peaks\(\Delta \mu _\textsf{peaks}\)divided by the width of the first peak\(\sigma _\textsf{noise}\)represents the SNR of the readout chain...
The left prefrontal cortex is essential for verbal communication. It remains uncertain at what timing, to what extent, and what type of phrase initiates left-hemispheric dominant prefrontal activation during comprehension of spoken sentences. We clarifie
Speech perception plays a key role in many fields of human development and social life but is often impaired by ambiguities on various levels of processing. While these phenomena have been extensively researched in the cognitive (neuro-) sciences according to empirical paradigms that adhere to the ...
Four simple periodic rhythms recorded in the EEG arealpha, beta, delta, and theta. These rhythms are identified by frequency (Hz or cycles/sec) and amplitude (Table 3.1). What are EEG patterns? The electroencephalogram (EEG) isthe depiction of the electrical activity occurring at the surface ...
in which one begins with a set of observations (e.g., EEG signals) and has to work backwards to try to calculate what caused them (e.g., neural activity in a specific brain region). A massive obstacle to this approach is the fact that as electrical signals pass from the brain to th...
1). In the context of clinical disorders, FC is most commonly investigated in a wakeful 'resting state' condition (task-free, revealing 'intrinsic' or 'spontaneous' FC, (Biswal et al., 1995)), but can technically be investigated in a variety of contexts and brain states (e.g., task,...