RT Journal Article
SR Electronic
T1 Coordination through Inhibition: Control of Stabilizing and Updating Circuits in Spatial Orientation Working Memory
JF eneuro
JO eNeuro
FD Society for Neuroscience
SP ENEURO.0537-20.2021
DO 10.1523/ENEURO.0537-20.2021
VO 8
IS 5
A1 Rui Han
A1 Hsuan-Pei Huang
A1 Chia-Lung Chuang
A1 Hung-Hsiu Yen
A1 Wei-Tse Kao
A1 Hui-Yun Chang
A1 Chung-Chuan Lo
YR 2021
UL http://www.eneuro.org/content/8/5/ENEURO.0537-20.2021.abstract
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.