Bulletin of the American Physical Society
APS March Meeting 2019
Volume 64, Number 2
Monday–Friday, March 4–8, 2019; Boston, Massachusetts
Session B65: Physics of Behavior II
11:15 AM–2:15 PM,
Monday, March 4, 2019
BCEC
Room: 260
Sponsoring
Unit:
DBIO
Chair: Yuhai Tu, IBM T J Watson Res Ctr
Abstract: B65.00007 : Decompositions of Behavioral Modulations and Run Shapes in Drosophila Larvae
12:51 PM–1:03 PM
Presenter:
Joseph Shomar
(University of Miami)
Authors:
Joseph Shomar
(University of Miami)
Anggie Ferrer
(University of Miami)
Joshua Forer
(University of Miami)
Tom Zhang
(University of Miami)
Mason Klein
(University of Miami)
To decouple the causes of behavioral modulation, we use temperature-insensitive mutants and 3 different spatiotemporal stimulus environments; PID controllers maintain the different spatial and temporal gradients. Many larvae are recorded during free navigation and computer vision software segments trajectories into alternating sequences of runs and turns, analogous to classic 2D random walks. The turn rate is the dominant characteristic of diffusive processes and larvae primarily achieve navigation by modulating it. Monte-Carlo simulations allow for comparison with experimental data and for analysis of otherwise unfeasible experiments.
Our results suggest that larvae exhibit different average speeds due to physical changes, and exhibit different turn rates because of both physical changes and sensory input. Computational methods are currently being explored for use in decomposing runs into run-shape eigenvectors.
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