Mapping 3D Sensory Inputs onto Spinal Interneurons

C. J. Heckman*, M. D. Johnson, A. Hyngstrom, E. J. Perreault

*Corresponding author for this work

Research output: Contribution to journalConference article

Abstract

Extracellular recordings of 43 spinal interneurons were performed in the decerebrate cat while its hindlimb was manipulated in 3 dimensional space with a 6-degree of freedom robotic arm. Internal/external rotations, toe in/toe out and flexion/extension movements were performed about the ankle joint. Peripheral nerve stimulation was used to categorize cells by field potential threshold into gr la and gr II types. 80% (16/20) of the gr la cells showed firing frequency changes to less than half of the rotations imposed by the robot and only 20% to more than half. 39% (9/23) of the gr II cells showed responses to less than half of the imposed movements and 61% (14/23) of the gr II cells responded to more than half of the imposed movements.

Original languageEnglish (US)
Pages (from-to)3837-3839
Number of pages3
JournalAnnual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings
Volume4
StatePublished - Dec 1 2003
EventA New Beginning for Human Health: Proceedings of the 25th Annual International Conference of the IEEE Engineering in Medicine and Biology Society - Cancun, Mexico
Duration: Sep 17 2003Sep 21 2003

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Keywords

  • Interneurons
  • Sensorimotor transformation
  • Spinal cord

ASJC Scopus subject areas

  • Signal Processing
  • Biomedical Engineering
  • Computer Vision and Pattern Recognition
  • Health Informatics

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