Optical stimulation provides sensory feedback between brains and artificial
  limbs
From: BioOptics World - 02/27/2017
By: Lee Dubay

Seeking to find out whether it is possible to transmit sensory feedback
signals from artificial limbs back to the brain by stimulating neural
activity in the cortex, a team of neuroscientists at the University of Geneva
(UNIGE; Switzerland) discovered that not only was it possible to create an
artificial sensation of neuroprosthetic movements, but that the underlying
learning process occurs very rapidly. These findings were obtained by
resorting to optical imaging and optical stimulation tools, offering an
innovative alternative to the traditional electrode approach.

Read the entire article at:
http://www.bioopticsworld.com/articles/2017/02/optical-stimulation-provides-sensory-feedback-between-brains-and-artificial-limbs.html

Links:
Rapid Integration of Artificial Sensory Feedback during Operant Conditioning
  of Motor Cortex Neurons
http://www.cell.com/neuron/abstract/S0896-6273(17)30047-8

Bioimaging, optical stimulation enable real-time observation of brain circuits
http://www.bioopticsworld.com/articles/2014/06/bioimaging-optical-stimulation-enable-real-time-observation-of-brain-circuits.html

Related:
Light-activated neurons control paralyzed muscles
http://www.bioopticsworld.com/articles/print/volume-7/issue-3/departments/biooptics-breakthroughs/motor-neuron-disease-neuroscience-light-activated-neurons-control-paralyzed-muscles.html