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Intrafascicular stimulation of monkey arm nerves evokes coordinated grasp and sensory responses.
Ledbetter, Noah M; Ethier, Christian; Oby, Emily R; Hiatt, Scott D; Wilder, Andrew M; Ko, Jason H; Agnew, Sonya P; Miller, Lee E; Clark, Gregory A.
Affiliation
  • Ledbetter NM; Department of Bioengineering, University of Utah, Salt Lake City, Utah 84112, USA.
J Neurophysiol ; 109(2): 580-90, 2013 Jan.
Article in En | MEDLINE | ID: mdl-23076108
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.
Subject(s)

Full text: 1 Collection: 01-internacional Database: MEDLINE Main subject: Peripheral Nerves / Hand Strength / Evoked Potentials, Somatosensory Limits: Animals Language: En Journal: J Neurophysiol Year: 2013 Type: Article Affiliation country: United States

Full text: 1 Collection: 01-internacional Database: MEDLINE Main subject: Peripheral Nerves / Hand Strength / Evoked Potentials, Somatosensory Limits: Animals Language: En Journal: J Neurophysiol Year: 2013 Type: Article Affiliation country: United States