Protocol to request
            
                Optogenetic stimulation and two-photon in vivo calcium imaging
                
                
            
        
        
            
                Research article
            
            
                Reciprocal synapses between mushroom body and dopamine neurons form a positive feedback loop required for learning
                
            
            
            
                Isaac Cervantes-Sandoval et al.
            
            
                DOI: 10.7554/eLife.23789