High-Yield Methods for Accurate Two-Alternative Visual Psychophysics in Head-Fixed Mice

Area of Science:

• Neuroscience
• Behavioral Neuroscience
• Systems Neuroscience

Background:

• The mouse is a key model organism in neuroscience due to its genetic accessibility and detailed brain atlases.
• Understanding visual decision-making in mice is crucial for advancing our knowledge of brain function.
• Existing methods may not fully capture the nuances of visual perception and choice behavior.

Purpose of the Study:

• To introduce high-yield methods for precisely probing mouse visual decisions.
• To establish a robust platform for studying the neural basis of vision in mice.
• To facilitate rapid learning and data acquisition in behavioral neuroscience experiments.

Main Methods:

• Head-fixed mice performing a two-alternative choice task using a steering wheel.
• Visual stimuli coupled to wheel position for intuitive learning and choice.
• Integration with two-photon imaging for cortical activity monitoring.
• Optogenetic inactivation to determine the necessity of visual cortex involvement.

Main Results:

• Mice rapidly learned the visual decision task, achieving high-quality psychometric curves for detection and discrimination.
• Behavior conformed to predictions of a simple probabilistic observer model.
• Optogenetic inactivation confirmed the requirement of the visual cortex for task performance.
• Dopamine neuron stimulation accelerated learning and increased trial performance.

Conclusions:

• The developed methods provide a powerful and accurate platform for investigating mouse visual perception and decision-making.
• This approach allows for detailed analysis of the neural circuits underlying visual behavior.
• The platform supports various motivational strategies, including fluid reward and optogenetic stimulation, enhancing experimental flexibility.