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Ablation of a Neuronal Population Using a Two-photon Laser and Its Assessment Using Calcium Imaging and Behavioral Recording in Zebrafish Larvae

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Published on: June 2, 2018

Pretectal neurons control hunting behaviour.

Paride Antinucci¹, Mónica Folgueira^2,3, Isaac H Bianco¹

¹Department of Neuroscience, Physiology & Pharmacology, UCL, London, United Kingdom.

|October 9, 2019

Summary

This summary is machine-generated.

Researchers identified specific pretectal neurons in larval zebrafish that control innate hunting behavior. Activating these neurons triggers hunting sequences, revealing a neural command system for predatory actions.

Keywords:

command system neuroscience optic tectum optogenetics predation pretectum sensorimotor processing zebrafish

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Published on: September 20, 2019

Area of Science:

Neuroscience
Ethology
Zebrafish models

Background:

Hunting is a vital innate behavior for survival across many species.
The neural circuits governing predatory action sequences remain largely uncharacterized.

Purpose of the Study:

To identify and characterize the neural circuits controlling hunting behavior in larval zebrafish.
To investigate the role of pretectal neurons in initiating and executing predatory sequences.

Main Methods:

Utilized calcium imaging combined with a virtual hunting assay in larval zebrafish.
Employed targeted genetic labeling for cell morphology and function analysis.
Used optogenetics for neuronal stimulation and laser ablation for functional impairment.

Main Results:

Identified a discrete pretectal region selectively active during hunting initiation.
Discovered two classes of pretectal neurons projecting to the optic tectum and tegmentum.
Optogenetic stimulation of single neurons induced hunting sequences; ablation impaired prey-catching.

Conclusions:

A specific population of pretectal neurons acts as a command system for inducing predatory behavior.
These neurons are crucial for the initiation and execution of hunting sequences.
Findings provide insight into the neural basis of innate predatory actions.