Table 1.

Summary of studies conducted with delta wave activity in healthy adults and patients with neurological disorders, which includes the montage method and the number of electrodes as well.

Authors	Journal	Aim of the study	Montage	Number of electrodes
Yener et al. [26]	European Journal of Neurology (2008)	Detection of subtle abnormalities of cognitive processes	Linked earlobes	13
Başar et al. [27]	Brain Research (2008)	Brain oscillations evoked by the face of a loved person	Linked earlobes	14
Harmony et al. [28]	International Journal of Physiology (1996)	EEG delta activity during difficult mental tasks and analysis of short term memory	Linked earlobes	19
Aftanas et al. [29]	Neuroscience and Behavioral Physiology (2006)	Analysis of evoked EEG synchronization and desynchronization in all frequencies bands in response to sequential presentation of IAPS pictures	Nose	62
Schürmann et al. [30]	Neuroscience Letters (1995)	A new metric for analyzing single trials ERPs based on visual P300 delta responses	Linked earlobes	7
Moretti et al. [31]	Clinical Neurophysiology (2004)	Individual analysis of EEG frequency and band power in mild Alzheimer disease	Linked earlobes	19