0 a child's toy that consists of a stick with brightly coloured pieces of plastic at one end that turn around when you blow them or hold the toy in the wind
Thus, orientation pinwheel centers in convergently squinting cats did not exhibit a consistent and significant topographical relationship to the peaks of ocular dominance domains.
The pinwheel type of symmetry is a major compositional issue along with some other local symmetries in both projects.
The dashed line indicates the expected value (10%) if the pinwheel centers were distributed randomly.
Variations are mainly governed by pinwheel type symmetry.
Iso-orientation domains exhibited a pinwheel-like organization, as previously described for normal and divergently squinting cats.
Only orientation-preference maps that were of sufficient quality to unambiguously determine pinwheel centers were subjected to this analysis (7 hemispheres from 5 animals).
Quantitative analysis of orientation-preference maps revealed that the average pinwheel density was similar for normal and convergently squinting cats.
A well-known open problem is to determine whether the pinwheel system is strongly mixing.
