Task-Specific Somatosensory Feedback via Cortical Stimulation in Humans

Jeneva A. Cronin, Jing Wu, Kelly L. Collins, Devapratim Sarma, Rajesh P.N. Rao, Jeffrey G. Ojemann, Jared D. Olson

Research output: Contribution to journalArticlepeer-review

20 Scopus citations

Abstract

Cortical stimulation through electrocorticographic (ECoG) electrodes is a potential method for providing sensory feedback in future prosthetic and rehabilitative applications. Here, we evaluate human subjects' ability to continuously modulate their motor behavior based on feedback from direct surface stimulation of the somatosensory cortex. Subjects wore a dataglove that measured their hand aperture position and received one of three stimuli over the hand sensory cortex based on their current hand position as compared to a target aperture position. Using cortical stimulation feedback, subjects adjusted their hand aperture to move towards the target aperture region. One subject was able to achieve accuracies and R2 values well above chance (best performance: R2 = 0.93; accuracy = 0.76/1). Performance dropped during the catch trial (same stimulus independent of the position) to below chance levels, suggesting that the subject had been using the varied sensory feedback to modulate their motor behavior. To our knowledge, this study represents one of the first demonstrations of using direct cortical surface stimulation of the human sensory cortex to perform a motor task, and is a first step towards developing closed-loop human sensorimotor brain-computer interfaces.

Original languageEnglish (US)
Article number7514940
Pages (from-to)515-522
Number of pages8
JournalIEEE Transactions on Haptics
Volume9
Issue number4
DOIs
StatePublished - Oct 1 2016
Externally publishedYes

Keywords

  • Haptics in neuroscience
  • human-computer interaction
  • perception and psychophysics
  • prosthetics
  • rehabilitation

ASJC Scopus subject areas

  • Human-Computer Interaction
  • Computer Science Applications

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