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J Neural Eng. 2014 Oct;11(5):056024. doi: 10.1088/1741-2560/11/5/056024. Epub 2014 Sep 22.

A cognitive neuroprosthetic that uses cortical stimulation for somatosensory feedback.

Abstract

OBJECTIVE:

Present day cortical brain-machine interfaces (BMIs) have made impressive advances using decoded brain signals to control extracorporeal devices. Although BMIs are used in a closed-loop fashion, sensory feedback typically is visual only. However medical case studies have shown that the loss of somesthesis in a limb greatly reduces the agility of the limb even when visual feedback is available.

APPROACH:

To overcome this limitation, this study tested a closed-loop BMI that utilizes intracortical microstimulation to provide 'tactile' sensation to a non-human primate.

MAIN RESULT:

Using stimulation electrodes in Brodmann area 1 of somatosensory cortex (BA1) and recording electrodes in the anterior intraparietal area, the parietal reach region and dorsal area 5 (area 5d), it was found that this form of feedback can be used in BMI tasks.

SIGNIFICANCE:

Providing somatosensory feedback has the poyential to greatly improve the performance of cognitive neuroprostheses especially for fine control and object manipulation. Adding stimulation to a BMI system could therefore improve the quality of life for severely paralyzed patients.

PMID:
25242377
PMCID:
PMC4410973
DOI:
10.1088/1741-2560/11/5/056024
[Indexed for MEDLINE]
Free PMC Article

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