An Objective and Reproducible Test of Olfactory Learning and Discrimination in Mice

Gary Liu; Jay M. Patel; Burak Tepe; Cynthia K. McClard; Jessica Swanson; Kathleen B. Quast; Benjamin R. Arenkiel

doi:10.3791/57142

Un Test objectif et reproductible d’apprentissage olfactif et de la Discrimination chez les souris

JoVE Journal
Neuroscience

A subscription to JoVE is required to view this content. Sign in or start your free trial.

JoVE Journal Neuroscience

An Objective and Reproducible Test of Olfactory Learning and Discrimination in Mice

Un Test objectif et reproductible d’apprentissage olfactif et de la Discrimination chez les souris

Full Text

9,235 Views

09:33 min

March 22, 2018

DOI: 10.3791/57142-v

Gary Liu*^1,2, Jay M. Patel*^2,3, Burak Tepe¹, Cynthia K. McClard^2,4, Jessica Swanson⁴, Kathleen B. Quast⁴, Benjamin R. Arenkiel^1,3,4,5

¹Program in Developmental Biology,Baylor College of Medicine, ²Medical Scientist Training Program,Baylor College of Medicine, ³Department of Neuroscience,Baylor College of Medicine, ⁴Department of Molecular and Human Genetics,Baylor College of Medicine, ⁵Jan and Dan Duncan Neurological Research Institute at Texas Children's Hospital

Please note that some of the translations on this page are AI generated. Click here for the English version.

Overview

This study investigates odor discrimination using an associative learning task in mice, focusing on learning-induced structural changes in the brain. The technique examines key neuroscience questions such as sensory discrimination and synaptic plasticity.

Key Study Components

Area of Science

Neuroscience
Olfaction
Behavioral learning

Background

Associative learning protocols are pivotal in studying cognitive functions.
Odor discrimination plays a crucial role in mammalian sensory processing.
Understanding olfactory behavior in mice may relate to human cognitive decline.
This method can be adapted for other sensory systems such as vision and audition.

Purpose of Study

To train mice to associate odors with rewards and punishments.
To explore olfactory processing and its implications for neurodegenerative disease.
To develop a robust behavioral assay for statistical analysis of learning.

Methods Used

Mice are trained using a specially configured behavioral chamber.
The training involves various stages, assessing accuracy in odor discrimination.
No multiomics workflows mentioned.
Critical steps include water restriction to manage motivation and stage completion criteria.
Procedures include meticulous setup of odor delivery systems and conditioning protocols.

Main Results

Mice successfully learn to associate different odors with rewards or punishment.
Training allows for high statistical sampling through repeated trials.
The accuracy in odor discrimination approaches 85% following training.
Results suggest that olfactory learning can be effectively assessed through this protocol.

Conclusions

The protocol demonstrates a reliable method for studying associative learning in olfaction.
This approach may offer insights into therapeutic strategies for neurodegenerative diseases.
Findings enhance understanding of sensory discrimination mechanisms in mammals.

Frequently Asked Questions

What are the advantages of this behavioral training protocol?

The protocol allows for high throughput trial performance, enabling robust statistical analysis and insights into olfactory learning.

How is the associative learning model implemented?

Mice are trained to associate one odor with a reward and another with a punishment, facilitating the study of olfactory discrimination.

What types of data or outcomes are obtained from this method?

The primary outcomes include accuracy rates in odor discrimination tasks and behavioral responses to various odor stimuli.

Can the method be adapted for other sensory modalities?

Yes, while focused on olfaction, the principles can be applied to studying learning in vision or audio discrimination tasks.

What limitations should researchers consider?

Potential issues include the complexity of setup and the need for consistent environmental factors to avoid distraction.

What specific behavioral metrics are monitored during training?

Key metrics include the number of trials completed, accuracy in reward timing, and overall learning curves across trial blocks.

How does the protocol contribute to understanding cognitive decline in humans?

The severity of olfactory dysfunction in mice can offer predictive insights into cognitive decline parallels observed in human studies.

Ici, nous formons la souris sur une tâche d’apprentissage associatif pour tester la discrimination à l’odeur. Ce protocole permet également d’études sur l’apprentissage induit par des changements structurels dans le cerveau.

L’objectif global de ce protocole de comportement est d’entraîner les souris à associer une odeur à une récompense et une autre odeur à une punition. Cette méthode peut aider à répondre à des questions clés dans le domaine des neurosciences, telles que l’apprentissage, la plasticité synaptique et la discrimination sensorielle. Le principal avantage de cette technique est qu’une fois entraînées, les souris effectuent des centaines d’essais en quelques heures pour un échantillonnage statistique robuste.

Les implications de cette technique s’étendent à la thérapie ou au diagnostic des maladies neurodégénératives, car la gravité du dysfonctionnement olfactif est prédictive du déclin cognitif ultérieur chez l’homme. Bien que cette méthode puisse donner un aperçu de l’olfaction, elle peut également être appliquée à d’autres systèmes, tels que la vision ou l’audition. La démonstration visuelle de cette méthode est essentielle, car les premières étapes de configuration de la chambre de comportement et d’utilisation du logiciel sont difficiles à apprendre, en raison des différents ports de connexion et des étapes de formation.

View the full transcript and gain access to thousands of scientific videos