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Decrease in occurrence of fast startle responses after selective Mauthner cell ablation in goldfish (Carassius

S J Zottoli¹, B C Newman, H I Rieff

¹Department of Biology, Williams College, Williamstown, MA 01267, USA. Steven.J.Zottoli@Williams.edu

Journal of Comparative Physiology. A, Sensory, Neural, and Behavioral Physiology

|April 8, 1999

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Goldfish Mauthner cells initiate fast startle responses. Ablating these neurons significantly reduced the probability of a startle response, suggesting their crucial role in activating other brainstem network elements.

Area of Science:

Neuroscience
Animal Behavior
Cellular Biology

Background:

The Mauthner cell, a reticulospinal neuron, is known to trigger rapid motor responses.
Previous research suggests a network of neurons, not just Mauthner cells, participates in fast startle responses.

Purpose of the Study:

To investigate the role of Mauthner cells in the brainstem fast startle response network.
To understand how Mauthner cells interact with other neurons in triggering startle behaviors.

Main Methods:

Selective ablation of Mauthner cells in goldfish.
Comparison of startle response probability in ablated versus control fish.

Main Results:

Fish with Mauthner cells ablated showed a significantly lower probability of eliciting a fast startle response.

Related Experiment Videos

The absence of Mauthner cells impaired the network's ability to generate startle behaviors.

Conclusions:

Mauthner cells play a critical role in triggering fast startle responses in goldfish.
Mauthner cell activation may be essential for recruiting other reticulospinal neurons within the startle response network.