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Related Experiment Video

Updated: May 20, 2026

In Vivo Wireless Optogenetic Control of Skilled Motor Behavior

In Vivo Wireless Optogenetic Control of Skilled Motor Behavior

Published on: November 22, 2021

Variable neuronal participation in stereotypic motor programs.

Evan S Hill¹, Sunil K Vasireddi, Angela M Bruno

¹Department of Cell Biology and Anatomy, The Chicago Medical School, Rosalind Franklin University of Medicine and Science, North Chicago, Illinois, United States of America. evan.hill@rosalindfranklin.edu

|July 21, 2012

Summary

This summary is machine-generated.

Neuronal networks for rhythmic behaviors are more dynamic than previously thought. Some neurons variably participate in motor programs, joining or leaving the network unpredictably, even across different episodes.

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Area of Science:

Neuroscience
Motor Control
Systems Neuroscience

Background:

Motor networks underlying rhythmic behaviors are often considered rigidly hard-wired.
Understanding the dynamic nature of these networks requires monitoring neuronal activity during motor program execution.

Purpose of the Study:

To investigate the extent to which neuronal networks for rhythmic behaviors are hard-wired versus fluid.
To determine if neuronal participation in motor networks changes moment-to-moment or episode-to-episode.

Main Methods:

Utilized large-scale voltage-sensitive dye (VSD) imaging in Tritonia diomedea.
Employed Independent Component Analysis (ICA) spike-sorting to analyze neuronal activity.
Confirmed findings using intracellular recording in dye-free saline.

Main Results:

Most neurons were dedicated to the swim network, but a subset showed variable participation.
These variable neurons joined late, left early, or skipped cycles within the motor program.
Neuronal participation varied significantly between different swim episodes and across species (Tritonia festiva, Aplysia californica).

Conclusions:

Neuronal networks underlying rhythmic motor programs exhibit greater variability than widely appreciated.
Even stereotyped behaviors may involve dynamic and flexible neuronal participation.
The presence of unreliably bursting neurons suggests a fluid structure in motor networks.