Maria Sandsten

Time-frequency analysis of childrens EEG responses observing social behavior, 
and
Evaluation of different frequency bandwidths for power estimation of the high-frequency Heart Rate Variability

Abstract

In this talk, we will discuss two seperate topics:

How are small children affected by watching adults communicate in different 
ways? During the study, the EEG of 20-24 month old children was recorded, 
while they were watching a repetitive sequence of three main types of film 
clips showing different communication situations between adults. The goal of 
the study was to investigate the difference in the measured EEG during the 
three types of clips. The LSP optimal multiple windows are used to investigate 
the difference between the time-dependent power of the EEG registrations of 
the different film clips with the aim to see when in time the difference in 
power occurs.

as well as  

We evaluate the correlation estimate based on multiple window spectrum analysis 
between the respiratory center frequency and the high frequency band of the 
heart rate variability (HRV) power. Oscillations at around 0.25 Hz constitute 
the HF - band and are related to respiration, i.e. respiratory sinus arrhythmia 
(RSA).  We use multiple window spectrum techniques for the estimation of the 
respiratory frequency as well as the power of the HRV.  We have shown that using 
a more narrow band for the power estimation gives higher correlation and the aim 
in this study is to evaluate if an optimal bandwidth for this frequency band can 
be obtained.