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© 2016 Tommerdahl M. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License Autism is a pervasive developmental disorder that affects many aspects of the central nervous system, and a number of the deficits manifested in the disorder could be attributed to disruptions in functional connectivity. These disruptions – which could occur both locally as well as globally – motivated us to develop metrics that would be sensitive to alterations in cortical-cortical interactions. In 2007, we reported a method for perceptually assessing the impact of stimulus-driven synchronization of cortical ensembles that showed significant promise for perceptually measuring local connectivity1. In that report, we demonstrated that delivering relatively weak sinusoidal stimuli to tips of digits 2 and 3 (D2 and D3) had a significant impact on an individual’s temporal order judgement (TOJ). The use of a number of other stimulus conditions presented simultaneously during the TOJ task – which did not have a significant impact on the individual’s TOJ – led us to develop a theory that synchronization of cortical ensembles in primary somatosensory cortex (SI) could significantly impact the topography of temporal perception. Additionally, we proposed that the impact that such synchronizing conditioning stimuli have on TOJ – which can be measured relatively quickly – could provide an effective means to assess the functional connectivity of neurologically compromised subject populations.

Commentary on: Absence of Stimulus-driven Synchronization Effects on Sensory Perception in Autism: Evidence for Local Under-Connectivity