Poster F119, Tuesday, March 28, 8:00 – 10:00 am, Pacific Concourse
Alpha Matters: Alpha Oscillatory Activity Correlates With Sensory Profile Measures
Nika Kartvelishvili1, Kevin Clancy1, Sarah Baisley1, Wen Li1; 1Florida State University
It has long been suspected that alpha oscillations (8-12 Hz) play an important role in the inhibition of irrelevant sensory input, and are thus involved in sensory gating and processing. The relationship between various alpha measures and the way an individual processes and reacts to sensory input, however, has never been explicitly tested. We recruited healthy undergraduate volunteers (n=20) and assessed sensory processing styles using the Adolescent/Adult Sensory Profile (ASP) questionnaire. We obtained individual peak alpha frequencies (PAF’s), alpha power, and causal connectivity measures in the alpha range [as indexed by granger causality (GC)] using resting-state eyes-open electroencephalography (EEG). Pearson correlational analysis revealed a significant positive correlation between left hemispheric alpha power and sensation seeking behavior (r=0.459, p=0.042) and a marginally significant positive correlation between these measures in the right hemisphere(r=0.376, p=0.102). Additionally, we found a marginally significant negative correlation between low visual registration and left alpha GC (r=-0.435, p=0.055). Finally, we discovered marginally significant negative correlations between left alpha GC and sensory sensitivity (r=-0.433, p=0.051) and between left alpha GC and sensory avoidance (r=-0.430, p=0.058). No significant correlations were found between PAF and any sensory measures on the ASP. Overall, the results suggest that alpha power and GC (especially in the left hemisphere) play important roles in the processing of sensory information. These findings have implications for the treatment of sensory processing disorder (SPD) as well as other conditions that may involve sensory processing abnormalities, such as autism spectrum disorder (ASD), attention deficit hyperactivity disorder (ADHD), and schizophrenia.
Topic Area: PERCEPTION & ACTION: Multisensory