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J Neurophysiol. 2013 Jan;109(2):580-90. doi: 10.1152/jn.00688.2011. Epub 2012 Oct 17.

Intrafascicular stimulation of monkey arm nerves evokes coordinated grasp and sensory responses.

Author information

1
Department of Bioengineering, University of Utah, Salt Lake City, Utah 84112, USA.

Abstract

High-count microelectrode arrays implanted in peripheral nerves could restore motor function after spinal cord injury or sensory function after limb loss. In this study, we implanted Utah Slanted Electrode Arrays (USEAs) intrafascicularly at the elbow or shoulder in arm nerves of rhesus monkeys (n = 4) under isoflurane anesthesia. Input-output curves indicated that pulse-width-modulated single-electrode stimulation in each arm nerve could recruit single muscles with little or no recruitment of other muscles. Stimulus trains evoked specific, natural, hand movements, which could be combined via multielectrode stimulation to elicit coordinated power or pinch grasp. Stimulation also elicited short-latency evoked potentials (EPs) in primary somatosensory cortex, which might be used to provide sensory feedback from a prosthetic limb. These results demonstrate a high-resolution, high-channel-count interface to the peripheral nervous system for restoring hand function after neural injury or disruption or for examining nerve structure.

PMID:
23076108
PMCID:
PMC3545468
DOI:
10.1152/jn.00688.2011
[Indexed for MEDLINE]
Free PMC Article

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