572
R. B. Pachori and V. Gupta
Fig. 12.25 Normal EEG signal with eyes open
Fig. 12.26 Seizure EEG
signal from patient
inputs. The EPs and ERPs are particularly used to investigate the response of a brain
corresponding to specific stimulation. The level of attention and stress can also be
monitored with the help of EPs during experiment.
The major limitation present in EEG signals is that the EEG signals cannot reveal
the information about the structure which is responsible for originating these signals.
The limitation is due to the fact that the EEG signals are the spatial sum of all action
potentials transmitted from billions of neurons at different depths below the cerebral
cortex. Therefore, the functional magnetic resonance imaging (fMRI) is used where
the functional information from the structures deeply situated in the brain is required
[30].
12.4.2 Electrocardiogram (ECG)
The electrical activity recorded from the heart is known as ECG. The ECG signal
is used for the clinical diagnosis of heart diseases. The cellular electrical excitation
due to cardiac muscle contraction can be recorded by ECG signals. The functioning
of these cells can be indicated by its electrical activation, while the depolarization
R. B. Pachori and V. Gupta
Fig. 12.25 Normal EEG signal with eyes open
Fig. 12.26 Seizure EEG
signal from patient
inputs. The EPs and ERPs are particularly used to investigate the response of a brain
corresponding to specific stimulation. The level of attention and stress can also be
monitored with the help of EPs during experiment.
The major limitation present in EEG signals is that the EEG signals cannot reveal
the information about the structure which is responsible for originating these signals.
The limitation is due to the fact that the EEG signals are the spatial sum of all action
potentials transmitted from billions of neurons at different depths below the cerebral
cortex. Therefore, the functional magnetic resonance imaging (fMRI) is used where
the functional information from the structures deeply situated in the brain is required
[30].
12.4.2 Electrocardiogram (ECG)
The electrical activity recorded from the heart is known as ECG. The ECG signal
is used for the clinical diagnosis of heart diseases. The cellular electrical excitation
due to cardiac muscle contraction can be recorded by ECG signals. The functioning
of these cells can be indicated by its electrical activation, while the depolarization