Advanced Search

Browse by Discipline

Scientific Societies

E-print Alerts

Add E-prints

E-print Network

  Advanced Search  

Abstract--Electroencephalograms (EEGs) provide a non-invasive way of measuring brainwave activity from sensors

Summary: Abstract--Electroencephalograms (EEGs) provide a non-
invasive way of measuring brainwave activity from sensors
placed on the scalp. In this paper we present an approach to
measure coupling, or synchrony, between various parts of the
brain, critical for motor and cognitive processing, using wavelet
coherence of EEG signals. We provide an argument, highlighting
the benefits of using this approach as opposed to the regular
Fourier based coherence, in the context of localizing short
significant bursts of coherence between non-stationary EEG
signals, to which regular coherence is insensitive. We further
highlight the benefits of the wavelets approach by exploring how
a single time-frequency coherence map can be controlled to yield
various time and/or frequency resolutions.
Understanding of cerebral dynamics is aided by the ability
to track temporal coupling between various neural signals [1].
The most common way of measuring coupling is through the
use of the coherence metric. Coherence is the degree of time-
locked correlation between two signals as a function of
frequency [2]. The problem that we address in this paper, and


Source: Abugharbieh, Rafeef - Department of Electrical and Computer Engineering, University of British Columbia


Collections: Biology and Medicine; Computer Technologies and Information Sciences