Constraints on cortical and thalamic projections: the no-strong-loops hypothesis

Nature. 1998 Jan 15;391(6664):245-50. doi: 10.1038/34584.


The many distinct cortical areas of the macaque monkey visual system can be arranged hierarchically, but not in a unique way. We suggest that the connections between these cortical areas never form strong, directed loops. For connections between the visual cortex and particular thalamic nuclei, we predict that certain types of connections will not be found. If strong, directed loops were to exist, we suggest that the cortex would go into uncontrolled oscillations.

Publication types

  • Research Support, U.S. Gov't, Non-P.H.S.
  • Research Support, U.S. Gov't, P.H.S.

MeSH terms

  • Animals
  • Macaca
  • Models, Neurological*
  • Neural Pathways
  • Thalamus / anatomy & histology*
  • Visual Cortex / anatomy & histology*