Cue Card Rotation Manipulation
Objective: To test how head-direction cell firing properties respond to changes in environmental orienting cues by rotating a white spatial cue card inside a cylinder
This is a Cue Card Rotation Manipulation protocol using rat as the model organism. The procedure involves 7 procedural steps, 3 equipment items, 1 materials. Extracted from a 1990 paper published in Journal of Neuroscience.
Model and subjects
rat • not specified • unknown • not specified • not specified
Study window
Estimated timing pending
Core workflow
Establish baseline recording in fixed environment • Rotate the cue card • Remove the cue card
Primary readouts
- Rotation of preferred firing direction in response to cue card rotation
- Peak firing rate changes
- Directional firing range
- Asymmetry of firing-rate/head-direction function
Key equipment and reagents
Use this page as an execution guide, then fall back to the source paper whenever you need exact exclusions, dosing details, or assay-specific caveats.
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Protocol Steps
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Establish baseline recording in fixed environment
Record head-direction cell firing properties from freely moving rats in the 76-cm diameter gray cylinder with white cue card in fixed position
Note: White card occupies 100 degrees of arc and serves as major orienting spatial cue
View evidence from paper
“Head-direction cells were recorded from rats as they moved freely in a 76-cm-diameter gray cylinder. A white card, occupying 100 degrees of arc, was taped to the inside wall”
Rotate the cue card
Rotate the white spatial cue card to a new position while recording head-direction cell firing
Note: Observe changes in preferred firing direction and other firing properties
View evidence from paper
“Rotation of the cue card produced near-equal rotation in the preferred firing direction of head-direction cells, with minimal changes in peak firing rate”
Remove the cue card
Remove the white card from the cylinder and record head-direction cell firing properties
Note: Assess effects on peak firing rate, range of firing, and preferred direction
View evidence from paper
“Card removal had no effect on peak firing rate or range of firing, but in 8/13 cells the preferred direction rotated by at least 24 degrees”
Change environment shape to rectangle
Replace the cylindrical enclosure with a rectangular enclosure and record head-direction cell firing
Note: Measure rotation of preferred firing direction and changes in peak firing rate and directional firing range
View evidence from paper
“changing the shape of the environment to a rectangular or square enclosure caused the preferred firing direction to rotate by at least 48 degrees for 8/10 cells in the rectangle”
Change environment shape to square
Replace the cylindrical enclosure with a square enclosure and record head-direction cell firing
Note: Measure rotation of preferred firing direction and changes in peak firing rate and directional firing range
View evidence from paper
“changing the shape of the environment to a rectangular or square enclosure caused the preferred firing direction to rotate by at least 48 degrees for 8/10 cells in the rectangle and 3/8 cells in the square”
Hand-hold and move animals around cylinder
Manually hold the animals and move them around the cylinder while recording head-direction cell firing
Note: Assess effects on preferred direction, firing range, and maximal firing rate
View evidence from paper
“Hand holding the animals and moving them around the cylinder had no effect on the preferred direction or firing range of the cell, but decreased the maximal firing rate in 7/9 cells”
Simultaneous dual-cell recordings
On selected occasions, record from two head-direction cells simultaneously during environmental manipulations
Note: Compare rotation of preferred firing direction between simultaneously recorded cell pairs
View evidence from paper
“On 2 occasions, 2 head-direction cells were recorded simultaneously. The rotation of the preferred firing direction for one cell was the same as the rotation of the preferred direction for the second cell”