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Widespread periodic intrinsic connections in the tree shrew visual cortex
Science (New York, N.Y.)
|March 19, 1982
Summary
Intrinsic connections in the tree shrew visual cortex form periodic stripes. This anatomical pattern mirrors 2-deoxyglucose activity, suggesting widespread lateral interactions in area 17.
Area of Science:
- Neuroscience
- Visual Cortex Anatomy
Background:
- The tree shrew (Tupaia glis) visual cortex, specifically area 17, is crucial for visual processing.
- Understanding the intrinsic connectivity patterns is key to deciphering cortical organization.
Observation:
- Periodic, stripe-like patterns of intrinsic connections were identified in layers I, II, and III of area 17.
- These anatomical stripes correspond to 2-deoxyglucose uptake patterns observed during visual stimulation with oriented lines.
Findings:
- The visual cortex exhibits a structured anatomical network organized in regular, repeating stripes.
- This organization suggests a functional link between intrinsic connections and visually evoked neural activity.
Implications:
- Widespread lateral interactions are superimposed on the existing retinotopic organization of area 17.
- These findings offer new perspectives for interpreting the functional role of cortical columns in visual processing.