Supplementary Materials1. provides amplification and enhanced precision of the head-direction signal. Introduction The relationship between stimulus-driven and internally generated activity is a recurring topic in neuroscience. Yet, how feed-forward sensory signals in subcortical, thalamic and cortical networks interact with internally organized (self-generated or spontaneous) activity is not well-understood, due largely to the high dimensionality of… Continue reading Supplementary Materials1. provides amplification and enhanced precision of the head-direction signal.