Brain connectivity study by multichannel system based on superconducting quantum magnetic sensors

In the present paper, we will report results about experimental study of brain functional connectivity performed by using a multichannel magnetoencephalographic system based on superconducting quantum interference devices. Such quantum devices exhibit magnetic field sensitivity high enough as to measure the extremely weak magnetic signals generated by the electrical neuronal activity. This powerful tool allows to study the temporal relation of spatially neurophysiological events, i.e. the functional connectivity, which recently captured attention in the field of brain function exploration. The paper reports system and sensors performance as well as data acquisition system and a detailed pipeline data analysis will be described. Brain connectivity measurements relative to parents of children with autism spectrum disorder will be shown, highlighting the preliminary results in topological metrics for different sub-items of autism-spectrum quotient test.