Fig. 2: Sensory experience is approximated by immediate ORN firing rate and change in firing rate.
From: Sensorimotor transformation underlying odor-modulated locomotion in walking Drosophila
a Linear filters were used to predict ORN responses from behavioral tracks. b Two track segments and the firing rate and change in firing rate for the black and yellow show that locomotion affects ORN responses. State space plots showing that sensory experience is a trajectory in the f–Df state space (extreme right). Red star indicates the beginning of each trajectory. Dotted line shows baseline firing rate. c Randomly selected 10,000 (gray dots) instantaneous firing rate (f) and change in firing rate (Df). The numbers represent different regions. Although each entry into the arena results in a unique trajectory though the f–Df space, most entries will result in sequential progression from region I to V of the state space. d Color maps: The arena was split into 60 × 60 bins where each bin represents the probability of a state-space region (I–V) given the spatial location. The labels—entering, leaving etc. are based on dominant behavior of the fly in each of those states. Probability plots: Probability of being in each region (I to V) as a function of radial distance. The nominal radial light border of 1.25 cm is shown in red.
