![]() ![]() In individual neurons, oscillations can appear either as oscillations in membrane potential or as rhythmic patterns of action potentials, which then produce oscillatory activation of post-synaptic neurons. Neural tissue can generate oscillatory activity in many ways, driven either by mechanisms within individual neurons or by interactions between neurons. Neural oscillations, or brainwaves, are rhythmic or repetitive patterns of neural activity in the central nervous system. The top neurons is oscillating spontaneously at ~30 Hz, the bottom neuron is not oscillating. Autocorrelations and spike raster plots of two single-units recorded from the secondary somatosensory cortex of a monkey. When this neural oscillation patterns of synchronization breakdown a depression of the signal intensity occurs. Figure illustrates how synchronized patterns of action potentials may result in macroscopic oscillations that can be measured outside the scalp. Upper panel shows spiking of individual neurons (with each dot representing an individual action potential within the population of neurons), and the lower panel the local field potential reflecting their summed activity. ![]() Simulation of neural oscillations at 10 Hz. ![]() For other uses, see Brain wave (disambiguation). ![]()
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