Thermal Stimulation Alters Cervical Spinal Cord Functional Connectivity in Humans

Kenneth A. Weber*, Amy I. Sentis, Olivia N. Bernadel-Huey, Yufen Chen, Xue Wang, Todd B. Parrish, Sean Mackey

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

13 Scopus citations

Abstract

The spinal cord has an active role in the modulation and transmission of the neural signals traveling between the body and the brain. Recent advancements in functional magnetic resonance imaging (fMRI) have made the in vivo examination of spinal cord function in humans now possible. This technology has been recently extended to the investigation of resting state functional networks in the spinal cord, leading to the identification of distinct patterns of spinal cord functional connectivity. In this study, we expand on the previous work and further investigate resting state cervical spinal cord functional connectivity in healthy participants (n = 15) using high resolution imaging coupled with both seed-based functional connectivity analyses and graph theory-based metrics. Within spinal cord segment functional connectivity was present between the left and right ventral horns (bilateral motor network), left and right dorsal horns (bilateral sensory network), and the ipsilateral ventral and dorsal horns (unilateral sensory-motor network). Functional connectivity between the spinal cord segments was less apparent with the connectivity centered at the region of interest and spanning <20 mm along the superior-inferior axis. In a subset of participants (n = 10), the cervical spinal cord functional network was demonstrated to be state-dependent as thermal stimulation of the right ventrolateral forearm resulted in significant disruption of the bilateral sensory network, increased network global efficiency, and decreased network modularity.

Original languageEnglish (US)
Pages (from-to)40-50
Number of pages11
JournalNeuroscience
Volume369
DOIs
StatePublished - Jan 15 2018

Keywords

  • functional MRI
  • humans
  • resting state
  • sensory function
  • spinal cord
  • upper extremity

ASJC Scopus subject areas

  • Neuroscience(all)

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