2020/01/23 by Jacob A. George, Mark R. Brinton, George, Jacob A. +9
Engineering · Neuroscience · #EEG and Brain-Computer Interfaces #FOS: Biological sciences #FOS: Computer and information sciences #Muscle activation and electromyography studies #Neurons and Cognition (q-bio.NC) #Neuroscience and Neural Engineering #Robotics (cs.RO)
paper · pdf · doi:10.48550/arxiv.2001.08808
openalex publication_date 2020/01/23 · openalex created_date 2022/07/22 · openalex updated_date 2026/07/28
Electrical stimulation of residual nerves can be used to provide amputees\nwith intuitive sensory feedback. An important aspect of this artificial sensory\nfeedback is the ability to convey the magnitude of tactile stimuli. Using\nclassical psychophysical methods, we quantified the just-noticeable differences\nfor electrocutaneous stimulation pulse frequency in both intact participants\nand one transradial amputee. For the transradial amputee, we also quantified\nthe just-noticeable difference of intraneural microstimulation pulse frequency\nvia chronically implanted Utah Slanted Electrode Arrays. We demonstrate that\nintensity discrimination is similar across conditions: intraneural\nmicrostimulation of the residual nerves, electrocutaneous stimulation of the\nreinnervated skin on the residual limb, and electrocutaneous stimulation of\nintact hands. We also show that intensity discrimination performance is\nsignificantly better at lower pulse frequencies than at higher ones - a finding\nthat's unique to electrocutaneous and intraneural stimulation and suggests that\nsupplemental sensory cues may be present at lower pulse frequencies. These\nresults can help guide the implementation of artificial sensory feedback for\nsensorized bionic arms.\n