Neural Ensemble Recording During T-Maze Decision Tasks
Objective: To examine neural ensemble representations of space in CA3 during T-maze decision tasks at fast time scales, specifically investigating how hippocampal ensembles encode spatial information and future possibilities during decision-making
This is a Neural Ensemble Recording During T-Maze Decision Tasks protocol using rat as the model organism. The procedure involves 5 procedural steps, 2 equipment items. Extracted from a 2007 paper published in Journal of Neuroscience.
Model and subjects
rat • not specified • unknown • not specified • not specified
Study window
Estimated timing pending
Core workflow
Neural ensemble recording setup • Spatial representation analysis • Forward sweep characterization
Primary readouts
- Location reconstructed from neural ensemble activity
- Direction of spatial representation sweep (forward vs backward relative to animal)
- Coherence of estimated spatial representations
- Theta and gamma frequency content in local field potentials
Key equipment and reagents
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Protocol Steps
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Neural ensemble recording setup
Record neural ensembles from CA3 region during T-maze task performance
Note: Recording occurs while rats perform decision tasks on T-maze
View evidence from paper
“Neural ensembles were recorded from the CA3 region of rats running on T-based decision tasks.”
Spatial representation analysis
Examine neural representations of space at fast time scales to identify transient phenomena during decision points
Note: Focus on identifying location reconstructions from neural ensemble activity
View evidence from paper
“Examination of neural representations of space at fast time scales revealed a transient but repeatable phenomenon as rats made a decision”
Forward sweep characterization
Analyze the location reconstructed from neural ensemble to determine directional sweep patterns relative to animal position
Note: Determine whether representations sweep forward ahead of animal or backward behind animal
View evidence from paper
“the location reconstructed from the neural ensemble swept forward, first down one path and then the other”
Local field potential analysis
Analyze local field potentials from recording sites for frequency content
Note: Examine theta and gamma frequencies; note absence of sharp wave frequencies
View evidence from paper
“Local field potentials from these sites contained pronounced theta and gamma frequencies, but no sharp wave frequencies.”
Task demand and experience effects
Examine how forward-shifted spatial representations are influenced by task demands and prior experience
Note: Assess modulation of neural representations based on experimental conditions
View evidence from paper
“Forward-shifted spatial representations were influenced by task demands and experience.”