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Updated: Apr 1, 2026

Light Spot-Based Assay for Analysis of Drosophila Larval Phototaxis

Light Spot-Based Assay for Analysis of Drosophila Larval Phototaxis

Published on: September 27, 2019

Orientation Selectivity Sharpens Motion Detection in Drosophila.

Yvette E Fisher¹, Marion Silies¹, Thomas R Clandinin¹

¹Department of Neurobiology, Stanford University, Stanford, CA 94305, USA.

|October 13, 2015

Summary

This summary is machine-generated.

Fruit flies

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Last Updated: Apr 1, 2026

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Published on: September 27, 2019

Tracking Drosophila Larval Behavior in Response to Optogenetic Stimulation of Olfactory Neurons

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Light Preference Assay to Study Innate and Circadian Regulated Photobehavior in Drosophila Larvae

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Published on: April 20, 2013

Area of Science:

Neuroscience
Computational Neuroscience
Animal Behavior

Background:

Visual processing relies on detecting edge orientation and motion.
Understanding the neural circuits for motion detection is key to explaining visually guided behaviors.

Purpose of the Study:

To investigate the circuit algorithms underlying direction and orientation selectivity in Drosophila.
To examine the role of T4 and T5 neurons in processing local motion cues.

Main Methods:

In vivo two-photon calcium imaging in Drosophila.
Analysis of direction-selective and orientation-selective signals in T4 and T5 neuron dendrites.

Main Results:

Direction-selective signals were identified in the dendrites of T4 and T5 neurons.
These neurons exhibit selective amplification of local light inputs, supporting the Hassenstein-Reichardt correlator model.
Neurons also showed orientation selectivity, responding to static features orthogonal to their motion axis, a property not predicted by the HRC.

Conclusions:

The T4/T5 circuit performs coincident extraction of orientation and direction.
Surround inhibition sharpens directional tuning.
Findings suggest a universal strategy for motion processing shared between flies and vertebrate cortex.