View source for 4 Hz vertex rhythm

Synonyme: 4 Hz Vertex spindles

* Trains of rhythmic waves 3.5-4.5Hz (mean 4Hz)
* Duration: 2.5sec
* Localisation: Cz
* Triangular appearance with an amplitude of around 40uV
* Seen during wakefulness
* NOT seen during drowsiness, sleep

* Adolescents & young adults
* Association with vasomotor instability/syncope reported by some authors


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'''''4 Hz vertex rhythm during 2 seconds (source)'''''
[[File: 4_Hz_vertex_rhythm_(source)_eegpedia.png|border|1200px]]
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'''''4Hz vertex rhythm during 2-3 seconds (source)'''''
[[File: 4_Hz_vertex_rhythm_(source)_2.png|border|1200px]]
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