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Object discrimination performance and dynamics evaluated by inferotemporal cell population activity
Ridey H Wang1, Lulin Dai1, Jun-Ya Okamura1
1Dept. of Bioengineering, Graduate School of Science and Engineering, Kagoshima University, Kagoshima 890-0065, Japan.
IBRO Neuroscience Reports
|April 12, 2021
Summary
The late phase of inferotemporal cell responses, not the early phase, is crucial for view-invariant object recognition. This involves dynamic changes in cell selectivity, aiding recognition across different object views.
Area of Science:
- Neuroscience
- Computational Neuroscience
- Cognitive Science
Background:
- Inferotemporal (IT) cells show altered response tolerance to trained views.
- IT cell responses exhibit distinct early and late phases post-stimulus onset.
Purpose of the Study:
- Investigate the differing roles of early and late IT cell response phases.
- Determine their involvement in view-invariant object recognition.
Main Methods:
- Utilized microelectrode recordings of IT cell responses to object images.
- Employed machine learning algorithms to build object discrimination classifiers.
- Analyzed responses with and without prior object discrimination training across views.
Main Results:
- Classifier performance did not differ significantly between early and late phases for untrained stimuli.
- Classifier performance was significantly better in the late phase for trained stimuli.
- Two-thirds of cells altered their stimulus preference between the early and late phases.
Conclusions:
- The late phase of IT cell activity is critical for view-invariant object recognition.
- Dynamic changes in cell selectivity during the late phase support recognition across views.
- The early phase appears less involved in view-invariant object recognition compared to the late phase.
