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Updated: Jul 12, 2025
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Investigating Object Representations in the Macaque Dorsal Visual Stream Using Single-unit Recordings
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Brain Functional Representation of Highly Occluded Object Recognition
Bao Li1, Chi Zhang1, Long Cao1
1Henan Key Laboratory of Imaging and Intelligent Processing, PLA Strategic Support Force Information Engineering University, Zhengzhou 450001, China.
Brain Sciences
|October 28, 2023
Summary
Recognizing occluded objects involves the occipital lobe and dorsal anterior cingulate cortex (dACC). Enhanced functional connectivity between these areas is crucial for identifying objects with significant visual obstruction.
Area of Science:
- Neuroscience
- Cognitive Neuroscience
- Neuroimaging
Background:
- Object recognition with visual occlusion is complex.
- Limited neuroimaging data exist on the neural mechanisms involved.
- Interaction between visual and cognitive brain areas is hypothesized.
Purpose of the Study:
- To investigate the neural mechanisms underlying highly occluded object recognition.
- To explore the roles of the occipital lobe and dorsal anterior cingulate cortex (dACC).
- To examine functional connectivity during occlusion object recognition tasks.
Main Methods:
- Functional magnetic resonance imaging (fMRI) was employed.
- 66 subjects performed object recognition tasks with varying occlusion levels.
- Generalized linear model (GLM), multivariate pattern analysis (MVPA), and psychophysiological interaction (PPI) were utilized.
Main Results:
- Occipital lobe (inferior, middle, occipital fusiform gyri) and dACC activation correlated with occlusion degree.
- Incorporating dACC activation improved classification precision in MVPA.
- Psychophysiological interaction (PPI) revealed enhanced functional connectivity (FC) between dACC and occipital lobe with increased occlusion.
Conclusions:
- The occipital lobe and dACC play a combined role in recognizing occluded objects.
- Enhanced functional connectivity between the dACC and occipital lobe is essential for processing highly occluded objects.
- Findings advance the understanding of how the brain processes incomplete visual information.
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