Tactile temporal processing in the auditory cortex

Nadia Bolognini, Costanza Papagno, Daniela Moroni, Angelo Maravita

Research output: Contribution to journalArticlepeer-review

Abstract

Perception of the outside world results from integration of information simultaneously derived via multiple senses. Increasing evidence suggests that the neural underpinnings of multisensory integration extend into the early stages of sensory processing. In the present study, we investigated whether the superior temporal gyrus (STG), an auditorymodality-specific area, is critical for processing tactile events. Transcranialmagnetic stimulation (TMS) was applied over the left STG and the left primary somatosensory cortex (SI) at different time intervals (60, 120, and 180 msec) during a tactile temporal discrimination task (Experiment 1) and a tactile spatial discrimination task (Experiment 2). Tactile temporal processing was disrupted when TMS was applied to SI at 60 msec after tactile presentation, confirming themodality specificity of this region. Crucially, TMS over STG also affected tactile temporal processing but at 180 msec delay. In both cases, the impairment was limited to the contralateral touches and was due to reduced perceptual sensitivity. In contrary, tactile spatial processing was impaired only by TMS over SI at 60-120 msec. These findings demonstrate the causal involvement of auditory areas in processing the duration of somatosensory events, suggesting that STG might play a supramodal role in temporal perception. Furthermore, the involvement of auditory cortex in somatosensory processing supports the view that multisensory integration occurs at an early stage of cortical processing.

Original languageEnglish
Pages (from-to)1201-1211
Number of pages11
JournalJournal of Cognitive Neuroscience
Volume22
Issue number6
DOIs
Publication statusPublished - Jun 2010

ASJC Scopus subject areas

  • Cognitive Neuroscience

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