Page 347 - Color Atlas Of Pathophysiology (S Silbernagl Et Al, Thieme 2000)

A. Genesis of the EEG
– Skull – –

Electrode
+ + +
1 2 3 3
Pyramidal cell
– + –
Na + Activation by Electroencephalogram (EEG)
contralateral cortex
and nonspecific parts
of thalamus

Activation by specific The
K + parts of thalamus
+ – Inhibition by
basket cells
+ Plate 10.20

Rhythm
4
Thalamus Negative feedback

B. Wave Frequency Pattern of EEG

α 8–13Hz

β 14–30Hz
2 Onset of an epileptic attack
θ 4–7Hz

δ 0.5–3Hz

1 Normal EEG frequencies
337
3 Rhythmic spike-wave complexes in absences

Silbernagl/Lang, Color Atlas of Pathophysiology © 2000 Thieme
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