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Tonic and phasic co-variation of peripheral arousal indices in infants.

Wass SV, de Barbaro K, Clackson K - Biol Psychol (2015)

Bottom Line: Tonic pupil size showed significant positive covariation, but phasic pupil changes were inconsistent.We conclude that: (i) there is high covariation between autonomic indices in infants, but that EDA may only be sensitive at extreme arousal levels, (ii) that tonic pupil size covaries with other indices, but does not show predicted patterns of phasic change and (iii) that motor activity appears to be a good proxy measure of ANS activity.The strongest patterns of covariation were observed using epoch durations of 40s per epoch, although significant covariation between indices was also observed using shorter epochs (1 and 5s).

View Article: PubMed Central - PubMed

Affiliation: Medical Research Council Cognition and Brain Sciences Unit, Cambridge, UK. Electronic address: samwass@gmail.com.

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Related in: MedlinePlus

Analysis was conducted on data pooled across the whole testing session, epoched in 20-s segments. Analyses were conducted pairwise, on different combinations of variables. For each pairwise comparison one variable was treated as the dependent variable (drawn on the y-axis) and another as the independent variable (drawn on the x-axis). All epochs were rank ordered and sorted into decile bins according to the independent variable. The median values of the dependent variable obtained within each decile bin have been drawn on the y axis, together with the standard deviation recorded within each decile bin. The results of the split-half linear regression analyses described in the text have been drawn as shaded areas. Red indicates that the regression was significant (p < .05) and grey indicates that it was not significant. (For interpretation of the references to colour in this figure legend, the reader is referred to the web version of this article.)
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fig0025: Analysis was conducted on data pooled across the whole testing session, epoched in 20-s segments. Analyses were conducted pairwise, on different combinations of variables. For each pairwise comparison one variable was treated as the dependent variable (drawn on the y-axis) and another as the independent variable (drawn on the x-axis). All epochs were rank ordered and sorted into decile bins according to the independent variable. The median values of the dependent variable obtained within each decile bin have been drawn on the y axis, together with the standard deviation recorded within each decile bin. The results of the split-half linear regression analyses described in the text have been drawn as shaded areas. Red indicates that the regression was significant (p < .05) and grey indicates that it was not significant. (For interpretation of the references to colour in this figure legend, the reader is referred to the web version of this article.)

Mentions: Fig. 5 shows the results of this analysis. A number of features can be seen. Firstly, head velocity, heart rate and peripheral accelerometry all significantly predict changes at both low and high arousal levels, as shown in Fig. 5, subplots a,b,e,f,i,j. (HV bin predicts HR (R2 = .035/.179 for low/high bins, both ps < .001) and PA (R2 = .013/.093, p = .001/<.001). HR bin predicts HV (R2 = .033/.151, both ps < .001) and PA (R2 = .026/.098, both ps < .001). PA bin predicts HV (R2 = .010/.079, p = .005/<.001) and HR (R2 = .045/.075, both ps < .001)).


Tonic and phasic co-variation of peripheral arousal indices in infants.

Wass SV, de Barbaro K, Clackson K - Biol Psychol (2015)

Analysis was conducted on data pooled across the whole testing session, epoched in 20-s segments. Analyses were conducted pairwise, on different combinations of variables. For each pairwise comparison one variable was treated as the dependent variable (drawn on the y-axis) and another as the independent variable (drawn on the x-axis). All epochs were rank ordered and sorted into decile bins according to the independent variable. The median values of the dependent variable obtained within each decile bin have been drawn on the y axis, together with the standard deviation recorded within each decile bin. The results of the split-half linear regression analyses described in the text have been drawn as shaded areas. Red indicates that the regression was significant (p < .05) and grey indicates that it was not significant. (For interpretation of the references to colour in this figure legend, the reader is referred to the web version of this article.)
© Copyright Policy - CC BY-NC-ND
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4645095&req=5

fig0025: Analysis was conducted on data pooled across the whole testing session, epoched in 20-s segments. Analyses were conducted pairwise, on different combinations of variables. For each pairwise comparison one variable was treated as the dependent variable (drawn on the y-axis) and another as the independent variable (drawn on the x-axis). All epochs were rank ordered and sorted into decile bins according to the independent variable. The median values of the dependent variable obtained within each decile bin have been drawn on the y axis, together with the standard deviation recorded within each decile bin. The results of the split-half linear regression analyses described in the text have been drawn as shaded areas. Red indicates that the regression was significant (p < .05) and grey indicates that it was not significant. (For interpretation of the references to colour in this figure legend, the reader is referred to the web version of this article.)
Mentions: Fig. 5 shows the results of this analysis. A number of features can be seen. Firstly, head velocity, heart rate and peripheral accelerometry all significantly predict changes at both low and high arousal levels, as shown in Fig. 5, subplots a,b,e,f,i,j. (HV bin predicts HR (R2 = .035/.179 for low/high bins, both ps < .001) and PA (R2 = .013/.093, p = .001/<.001). HR bin predicts HV (R2 = .033/.151, both ps < .001) and PA (R2 = .026/.098, both ps < .001). PA bin predicts HV (R2 = .010/.079, p = .005/<.001) and HR (R2 = .045/.075, both ps < .001)).

Bottom Line: Tonic pupil size showed significant positive covariation, but phasic pupil changes were inconsistent.We conclude that: (i) there is high covariation between autonomic indices in infants, but that EDA may only be sensitive at extreme arousal levels, (ii) that tonic pupil size covaries with other indices, but does not show predicted patterns of phasic change and (iii) that motor activity appears to be a good proxy measure of ANS activity.The strongest patterns of covariation were observed using epoch durations of 40s per epoch, although significant covariation between indices was also observed using shorter epochs (1 and 5s).

View Article: PubMed Central - PubMed

Affiliation: Medical Research Council Cognition and Brain Sciences Unit, Cambridge, UK. Electronic address: samwass@gmail.com.

Show MeSH
Related in: MedlinePlus