James A. Mazer Department of Neurobiology Yale School of Medicine
Neural Representations of Attention and Salience Feature-based attention in area V4 - labeled lines or matched filters?
- (monkey single-unit)
Maintaining spatial attention during eye movements - spatiotopic or retinotopic maps for spatial attention?
- (human psychophysics)
Attention and salience maps
Attention and salience maps
Attention and salience maps
RSVP: (slow) Rapid Search Visual Presentation
RSVP: (slow) Rapid Search Visual Presentation
RSVP: (slow) Rapid Search Visual Presentation
RSVP: (slow) Rapid Search Visual Presentation
RSVP: (slow) Rapid Search Visual Presentation
RSVP: (slow) Rapid Search Visual Presentation
RSVP: (slow) Rapid Search Visual Presentation
RSVP: (slow) Rapid Search Visual Presentation
RSVP: (slow) Rapid Search Visual Presentation
RSVP: (slow) Rapid Search Visual Presentation
RSVP: (slow) Rapid Search Visual Presentation
Tuning during RSVP: Spike Triggered Average
Tuning during RSVP: Spike Triggered Average
Tuning during RSVP: Spike Triggered Average
Tuning during RSVP: Spike Triggered Average
Tuning during RSVP: Spike Triggered Average
Interim Summary: Feature-based attention V4 feature-based attention affects: changes in preferred stimulus could facilitate target detection, but not in any simple manner (some +, some -) modulation is maximal in a sub-population of broadly tuned V4 neurons, suggesting multiple intermingled populations within V4 - perhaps reflecting modulated and veridical subpopulations…
Spatial cueing 101
Spatial cueing 101
Spatial cueing 101
Neural representation of the cue?
Neural representation of the cue?
Neural representation of the cue?
Neural representation of the cue?
Neural representation of the cue?
Neural representation of the cue?
The representation of spatial attention
Conclusions feature-based attention - feature-based in V4 can alter both gain and preferred stimulus
- orientation tuning changes are “correlated” with behavioral goals
maintaining spatial attention across eye movements - saccade planning and spatial cueing are dissociable (anti-premotor)
- spatial attention is intrinsically retintopic
- spatiotopic representations required active, top-down updating or remapping under voluntary control
Acknowledgements
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