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- W3134850948 abstract "Abstract Objective . Intracortical microstimulation of the primary somatosensory cortex (S1) has shown great progress in restoring touch sensations to patients with paralysis. Stimulation parameters such as amplitude, phase duration, and frequency can influence the quality of the evoked percept as well as the amount of charge necessary to elicit a response. Previous studies in V1 and auditory cortices have shown that the behavioral responses to stimulation amplitude and phase duration change across cortical depth. However, this depth-dependent response has yet to be investigated in S1. Similarly, to our knowledge, the response to microstimulation frequency across cortical depth remains unexplored. Approach . To assess these questions, we implanted rats in S1 with a microelectrode with electrode-sites spanning all layers of the cortex. A conditioned avoidance behavioral paradigm was used to measure detection thresholds and responses to phase duration and frequency across cortical depth. Main results . Analogous to other cortical areas, the sensitivity to charge and strength–duration chronaxies in S1 varied across cortical layers. Likewise, the sensitivity to microstimulation frequency was layer dependent. Significance . These findings suggest that cortical depth can play an important role in the fine-tuning of stimulation parameters and in the design of intracortical neuroprostheses for clinical applications." @default.
- W3134850948 created "2021-03-15" @default.
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- W3134850948 date "2021-04-14" @default.
- W3134850948 modified "2023-10-16" @default.
- W3134850948 title "Layer-specific parameters of intracortical microstimulation of the somatosensory cortex" @default.
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- W3134850948 doi "https://doi.org/10.1088/1741-2552/abedde" @default.
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