AUTHOR=Horwitz Anna , Klemp Marc , Horwitz Henrik , Thomsen Mia Dyhr , Rostrup Egill , Mortensen Erik Lykke , Osler Merete , Lauritzen Martin , Benedek Krisztina TITLE=Brain Responses to Passive Sensory Stimulation Correlate With Intelligence JOURNAL=Frontiers in Aging Neuroscience VOLUME=11 YEAR=2019 URL=https://www.frontiersin.org/journals/aging-neuroscience/articles/10.3389/fnagi.2019.00201 DOI=10.3389/fnagi.2019.00201 ISSN=1663-4365 ABSTRACT=

This study investigates the association between intelligence and brain power responses to a passive audiovisual stimulation. We measure the power of gamma-range steady-state responses (SSRs) as well as intelligence and other aspects of neurocognitive function in 40 healthy males born in 1953. The participants are a part of a Danish birth cohort study and the data therefore include additional information measured earlier in life. Our main power measure is the difference in power between a visual stimulation and a combined audiovisual stimulation. We hypothesize and establish empirically that the power measure is associated with intelligence. In particular, we find a highly significant correlation between the power measure and present intelligence scores. The association is robust to controlling for size-at-birth measures, length of education, speed of processing as well as a range of other potentially confounding factors. Interestingly, we find that intelligence scores measured earlier in life (childhood, youth, late midlife), are also correlated with the present-day power measure, suggesting a deep connection between intelligence and the power measure. Finally, we find that the power measure has a high sensitivity for detection of an intelligence score below the average.