Resting State Functional Connectivity Analysis Using Magnetoencephalography (MEG) Differs Between Visual Snow Patients and Controls

The syndrome of visual snow (VSS) has so far been described by observed patterns of increased neuronal excitability and hyperexcitability. When hyperexcitability affects cortical networks it can lead to thalamocortical dysrythmias, a presumed cause for related disorders tinnitus, migraine and tremor. Visual cortex gamma oscillations reflect cognitive processing in the cortex. Alpha oscillations are associated with thalamically generated pulses of cortical inhibition, altering information processing. In this study we used Magnetocephalography (MEG) to determine whether resting-state oscillatory activity in VS patients exhibits distinct patterns akin to that seen in other disorders.