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Interelectrode distance and amplitude of the scalp electroencephalogram


, : Interelectrode distance and amplitude of the scalp electroencephalogram. Electroencephalography & Clinical Neurophysiology 61(2): 26P

The relationship between interelectrode distance and amplitude of the scalp EEG was investigated quantitatively, using differential recording arrays extending anteriorly from O2 and coronally from T3. Amplitude was taken as the square root of the power spectrum. For total signal amplitude and for individual frequency bands, measured data corresponded well to an exponential function of the form Y =S(1-e-BX). The inverse of the exponential coefficient B may be taken as a space constant and the asymptote A as an estimate of absolute EEG amplitude. The concept of the space constant was consistent with current models of neuronal synchrony in the scalp EEG. The coefficients A and B may be useful indices in EEG analysis.

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Other references

Modlin, B.; Weiss, M.M., 1970: Vocal cord paralysis in congestive heart failure. Archives of Otolaryngology 91(3): 294-295

Sharnoff, J.G.; Kim, E.S., 1958: Pulmonary megakaryocyte studies in rabbits. Epinephrine stimulation produces an increased pulmonary megakaryocytosis in rabbits and may simultaneously produce an increased thrombocytosis and hyper coagulability of the blood. These studies suggest that pulmonary megakaryocytes may be a signi...

Bayer, U., 1982: Ammonite maneuverability - a new look at the function of shell geometry. Neues Jahrbuch fuer Geologie und Palaeontologie Abhandlungen, 1641-2: 154-156

Theodoropoulos, D.; Schwartz, I.L.; Walter, R., 1967: Synthesis of selenium-containing peptides. A general and convenient method for the synthesis of Se-benzyl-L-selenocysteine derivatives, including Se-benzyl-L-selenocysteine peptides, is described. The method involves the nucleophilic displacement of the O-tosyl moiety in O-tosylated serine...

Marrison, L.R.; Dickinson, J.M.; Fairlamb, I.J.S., 2002: Bioactive 4-substituted-6-methyl-2-pyrones with promising cytotoxicity against A2780 and K562 cell lines. Bioactive synthetic 4-substituted-6-methyl-2-pyrones are reported. Various 4-substitutents have been incorporated using Pd-catalysed carbon-carbon bond coupling procedures. Preliminary screening of the 2-pyrones against human ovarian carcinoma (A2...

Malison, R.T.; Miller, E.G.; Greene, R.; McCarthy, G.; Charney, D.S.; Innis, R.B., 1993: Computer-assisted coregistration of multislice SPECT and MR brain images by fixed external fiducials. We have developed and validated in a phantom a method of computer-assisted coregistration using multislice SPECT and MR images. Reusable fiducial markers were fabricated from nylon-based plastic and consist of two parts: a base that remains fixed...

Dwivedi, K.Kumar.; Prasad, G.; Saini, S.; Mahajan, S.; Lal, S.; Baveja, U.Krishan., 2007: Enteric opportunistic parasites among HIV infected individuals: associated risk factors and immune status. Data on various etiologic agents causing diarrhea in human immunodeficiency virus type-1 (HIV-1) infected individuals are sparse in Delhi, India. The present study was undertaken to identify various causative agents, the role of associated risk fa...

Mikhnovskaya N.D.; Kostyuchenko I.P.; Didyk L.G.; Sheremet V.P., 1987: Effect of the conditions of aquatic medium on the entomopathogenic activity and variability of bacillus thuringiensis h 14. Bactoculicide, the home preparation made on the base of Bacillus thuringiensis H14, was introduced into water bodies whose water temperature in summer period varied in the range of 5.5-14; 12-20.degree. C; 18-25.degree. C. During the first 2 days...

Chatron, M., 1933: Un nouveau cas de distomatose humaine a Fasciola hepatica. Bulletin de la Societe de Pathologie Exotique Paris, 26: 24-25

Reiprich, A., 1971: A list of butterflies from the protected region of Slovensky Raj and from the environment of Spisska Nova Ves. (results of studies from the years 1945-1969). Entomologicke problemy: 0 5-105