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. Author manuscript; available in PMC: 2012 Mar 1.
Published in final edited form as: Biol Psychol. 2010 Dec 21;86(3):230–238. doi: 10.1016/j.biopsycho.2010.12.003

Table 4.

Association between frontal EEG measures with HRV responses to Happiness Recall, Anger Recall and Stroop Color Word Test

Happiness Recall Anger Recall SCWT
LF HF LF/HF ratio LF HF LF/HF ratio LF HF LF/HF ratio
EEG levels during
Emotion-inducing tasks a
Left frontal 0.081 0.224 −0.061 −0.014 0.192 −0.149 −0.402 t −0.302 0.140
Right frontal 0.027 0.248 −0.121 0.041 0.311 −0.153 −0.389 t −0.228 0.027
Lateralization −0.194 0.041 −0.062 −0.102 0.340 −0.226 0.093 0.237 −0.147
EEG Response
(Δ from baseline) b
Left frontal 0.216 −0.037 0.364 −0.114 0.217 −0.214 −0.009 −0.151 0.037
Right frontal 0.232 −0.256 0.582** −0.105 0.072 −0.126 0.068 −0.223 0.138
Lateralization −0.074 −0.189 0.103 0.080 −0.096 0.096 0.193 −0.107 .0173

Data present non-parametric (Spearman) correlations

**

= p < 0.01,

*

= p < 0.05,

t

= trend: p < 0.10.

a

Positive correlations between EEG-based levels during tasks with ΔHRV indices indicate that frontal activity is associated with an decrease in the HRV index because brain activity is reflected by lower EEG values. Negative correlations indicate that increased frontal activity is associated with increased ΔHRV indices.

b

Positive correlations between changes in EEG data with ΔHRV indices indicate that increases in frontal activity are associated with a decrease in the HRV index, and negative correlations indicate that frontal activation is associated with increases in ΔHRV indices.