3.3 Taxonomy of Biosignals

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85

time units

ECG with disturbances

derivation potential U / mV

Fig. 3.31: ECG generated with the three-oscillator-model from Figure 3.29 with additional disturb-

ances due to a sinusoidal fluctuation of the baseline with a period length of 32 time units and an

amplitude of 0.12 as well as a normally distributed noise signal (mean of 0, dispersion of 0.024).

Fig. 3.32: The illustration shows Hans Berger (1873–1941) in 1927 (right) and EEG signals from

his daughter Ilse (left). From top to bottom: Ilse at rest (alpha waves), Ilse calculating a sum (beta

waves) and Ilse announcing the result of the sum (mixed-waves) [88].

FAEP), further via the midbrain (middle AEP, MAEP), to the auditory cortex (late

AEP, SAEP).

2.

Visual evoked potentials (VEP), which allow assessment of the visual nerve and

visual pathways based on the electrical potentials triggered in the visual cortex

(occipital cortex).

3.

Somatic evoked potentials (SEP), which can be used to assess the central and peri-

pheral somatosensitive pathways and nerves. This is done by inducing electrical

stimuli near a sensitive nerve using a stimulating electrode.