PT - JOURNAL ARTICLE AU - Rui Han AU - Hsuan-Pei Huang AU - Chia-Lung Chuang AU - Hung-Hsiu Yen AU - Wei-Tse Kao AU - Hui-Yun Chang AU - Chung-Chuan Lo TI - Coordination through Inhibition: Control of Stabilizing and Updating Circuits in Spatial Orientation Working Memory AID - 10.1523/ENEURO.0537-20.2021 DP - 2021 Sep 01 TA - eneuro PG - ENEURO.0537-20.2021 VI - 8 IP - 5 4099 - http://www.eneuro.org/content/8/5/ENEURO.0537-20.2021.short 4100 - http://www.eneuro.org/content/8/5/ENEURO.0537-20.2021.full SO - eNeuro2021 Sep 01; 8 AB - Spatial orientation memory plays a crucial role in animal navigation. Recent studies of tethered Drosophila melanogaster (fruit fly) in a virtual reality setting showed that the head direction is encoded in the form of an activity bump, i.e., localized neural activity, in the torus-shaped ellipsoid body (EB). However, how this system is involved in orientation working memory is not well understood. We investigated this question using free moving flies (D. melanogaster) in a spatial orientation memory task by manipulating two EB subsystems, C and P circuits, which are hypothesized for stabilizing and updating the activity bump, respectively. To this end, we suppressed or activated two types of inhibitory ring neurons (EIP and P) which innervate EB, and we discovered that manipulating the two inhibitory neuron types produced distinct behavioral deficits, suggesting specific roles of the inhibitory neurons in coordinating the stabilization and updating functions of the EB circuits. We further elucidate the neural mechanisms underlying such control circuits using a connectome-constrained spiking neural network model.