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Related Experiment Video

Updated: Jun 10, 2026

Multi-unit Recording Methods to Characterize Neural Activity in the Locust (Schistocerca Americana) Olfactory Circuits

Multi-unit Recording Methods to Characterize Neural Activity in the Locust (Schistocerca Americana) Olfactory Circuits

Published on: January 25, 2013

Sparse but specific temporal coding by spikes in an insect sensory-motor ocellar pathway.

Peter J Simmons¹, Rob R de Ruyter van Steveninck

¹Institute of Neuroscience and School of Biology, Newcastle University, Newcastle upon Tyne, NE1 7RU, UK. p.j.simmons@ncl.ac.uk

The Journal of Experimental Biology

|July 20, 2010

Summary

Locust DNI neurons precisely time spikes in response to visual stimuli, carrying significant information. This suggests their role in an optical proprioceptor system for head movement detection during flight.

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Last Updated: Jun 10, 2026

Multi-unit Recording Methods to Characterize Neural Activity in the Locust (Schistocerca Americana) Olfactory Circuits

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Published on: January 25, 2013

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Optical Recording of Suprathreshold Neural Activity with Single-cell and Single-spike Resolution

Optical Recording of Suprathreshold Neural Activity with Single-cell and Single-spike Resolution

Published on: September 5, 2012

Area of Science:

Neuroscience
Insect Physiology
Sensory Systems

Background:

Ocellar L-neurons in locusts respond to wide-field visual motion.
These neurons transmit graded synaptic input to downstream neurons.

Purpose of the Study:

Investigate information coding in the locust DNI neuron.
Determine how DNI transforms synaptic input into precisely timed axonal spikes.
Explore the role of DNI in sensory processing.

Main Methods:

Electrophysiological recordings from DNI neurons in locusts.
Stimulation using fluctuating LED light and oscillating visual horizons.
Information theory analysis of spike timing and coding.

Main Results:

DNI neurons exhibit sparse, sub-millisecond precise spike timing in response to light stimuli.
Individual spikes carry substantial information (4.5-7 bits per spike).
DNI spike timing is phase-locked to visual stimuli and modulated by light intensity.

Conclusions:

DNI neurons precisely encode visual information through spike timing.
DNI functions as a multimodal interneuron, integrating ocellar input.
DNI is likely part of an optical proprioceptor system for head movement detection during flight.