Bilateral interactions of optic-flow sensitive neurons coordinate course control in flies

Area of Science:

• Neuroscience
• Animal Behavior
• Insect Navigation

Background:

• Animals use optic-flow, or global visual motion cues, for stability and navigation.
• The optomotor response is a traditional model, but insufficient for understanding complex visual course control networks.
• The intricate optic-flow processing network in insects remains incompletely understood.

Purpose of the Study:

• To investigate course control behaviors in Drosophila.
• To link specific neural circuits to visual navigation in flies.
• To elucidate the role of optic-flow processing in insect behavior.

Main Methods:

• Behavioral analysis of Drosophila.
• Neural circuit mapping of optic-flow-sensitive neurons.
• Investigation of electrical and chemical synaptic interactions.

Main Results:

• Bilateral electrical coupling of optic-flow-sensitive neurons in the lobula plate is essential for proper course control.
• Electrical coupling, alongside chemical synapses in the HS-H2 network, regulates turning behavior dynamics and direction.
• Identified specific neural circuits underlying visual course control in Drosophila.

Conclusions:

• The HS-H2 network plays a crucial role in insect navigation using bilateral motion cues.
• Electrical coupling via gap junctions contributes to non-linear operations in visual course control.
• This study assigns new functional significance to the HS-H2 network and gap junctions in insect navigation.