Specifically in the peripheral nervous system, there's been some work along these lines, primarily in anesthetized experiments, using ChR2-expressing stem cells, which integrate into denervated nerves, and enable optogenetic control of the previously denervated muscles. See here: http://www.ncbi.nlm.nih.gov/pubmed/24700859
We wrote a review recently about what's been happening in optogenetics in the peripheral nervous system/spinal cord. That's here: http://www.ncbi.nlm.nih.gov/pubmed/27147590
We wrote a review recently about what's been happening in optogenetics in the peripheral nervous system/spinal cord. That's here: http://www.ncbi.nlm.nih.gov/pubmed/27147590