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Exploring visual attention functions of the human extrageniculate pathways through behavioral cues
Raphaël Mizzi1, George A Michael1
1EMC Laboratory, Department of Cognitive Psychology and Neuropsychology.
Psychological Review
|October 13, 2016
Summary
Visual attention involves subcortical pathways bypassing the main visual relay. Nasal-temporal asymmetries and S-cone stimuli reliably probe these extrageniculate functions.
Area of Science:
- Neuroscience
- Experimental Psychology
- Visual Cognition
Background:
- Visual attention relies on both subcortical and cortical pathways.
- The extrageniculate pathways, bypassing the lateral geniculate nucleus and primary visual cortex, play a significant role in subcortical visual attention.
- Understanding these pathways is crucial for a comprehensive model of visual attention.
Purpose of the Study:
- To review the role of extrageniculate pathways in visual attention.
- To evaluate the utility of specific behavioral cues in probing extrageniculate functions.
- To synthesize findings from neuroscience and experimental psychology regarding extrageniculate pathways.
Main Methods:
- Review of neurophysiological, neuropsychological, and neuroimaging studies.
- Analysis of behavioral cues: nasal-temporal asymmetries, S-cone stimuli, and perceptually suppressed stimuli.
- Integration of findings from experimental psychology and neuroscience.
Main Results:
- Nasal-temporal asymmetries and responses to S-cone stimuli are consistent with known extrageniculate functions.
- These cues serve as plausible probes for extrageniculate-dependent attention.
- Evidence for responses to perceptually suppressed stimuli as a probe is currently insufficient.
Conclusions:
- Nasal-temporal asymmetries and S-cone stimuli are validated behavioral probes for extrageniculate pathway functions in visual attention.
- Further research is needed to establish perceptually suppressed stimuli as a reliable probe.
- The extrageniculate pathways are integral to subcortical visual attention mechanisms.
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