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Neural mechanisms for prediction: do insects have forward models?
1Institute for Perception, Action and Behaviour, School of Informatics, University of Edinburgh, James Clark Maxwell Building, King's Buildings, Mayfield Road, Edinburgh EH9 3JZ, Scotland, UK. bwebb@inf.ed.ac.uk
Trends in Neurosciences
|April 28, 2004
Summary
Forward models, which predict sensory consequences of action, are key in vertebrate motor control. Recent invertebrate studies suggest similar predictive mechanisms in insect nervous systems, challenging the notion of these being high-level cognitive functions.
Area of Science:
- Neuroscience
- Comparative Physiology
- Motor Control
Background:
- Forward models are increasingly recognized as a crucial explanatory concept in vertebrate motor control.
- The core idea is that nervous systems predict the sensory consequences of action.
- This predictive capability is often linked to higher cognitive functions.
Purpose of the Study:
- To explore the presence and function of forward models in invertebrate nervous systems, specifically insects.
- To examine recent evidence demonstrating predictive sensory modulation by motor output in invertebrates.
- To discuss the implications of these findings for understanding insect behavior and forward models.
Main Methods:
- Review of recent evidence from invertebrate studies.
- Analysis of the connection between forward models, efference copy, and corollary discharge in insects.
- Discussion of the extent to which invertebrate data supports the existence of forward models.
Main Results:
- Evidence suggests that invertebrates, including insects, exhibit predictive modulation of sensory processes by motor output.
- The functions attributed to forward models in vertebrates appear to have analogues in insect behavior.
- Concepts like efference copy and corollary discharge are closely related to forward models in insects.
Conclusions:
- Insect nervous systems likely implement mechanisms analogous to forward models.
- Predictive sensory processing is not exclusive to higher cognitive functions and is present in invertebrates.
- Further research is needed to fully elucidate the role and mechanisms of forward models in insects.