Respuesta :
All levels of the central nervous system exhibit neural oscillations, which can be detected by electroencephalography as spike trains, local field potentials, and large-scale oscillations (EEG).
Techniques like EEG can be used to quantify intense activity. Pink noise-like spectrums are typical of EEG signals, but they also show rhythmic activity in some frequency regions. Alpha activity (8–12 Hz), which may be picked up from the occipital lobe during relaxed wakefulness and which increases when the eyes are closed, is the first and best-known frequency band.
Theta, beta, low gamma (30-70 Hz), high gamma (70-150 Hz), and delta (1-4 Hz) are other frequency bands. Faster rhythms, such as gamma activity, have been connected to cognitive processing. In fact, during sleep, EEG signals fluctuate significantly and demonstrate a shift from faster to slower frequencies, such as alpha waves. In fact, the spectral content of sleep at various stages is frequently used to define them. As a result, cognitions like awareness and consciousness have been associated with neuronal oscillations.
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