Full Idea
The three usual systems (really the only possible ones) for the community between soul and body are physical influence, preestablished harmony, and supernatural assistance.
Gist of Idea
Soul and body connect physically, or by harmony, or by assistance
Source
Immanuel Kant (Critique of Pure Reason [1781], B406-/A390)
Book Reference
Kant,Immanuel: 'Critique of Pure Reason', ed/tr. Guyer,P /Wood,A W [CUO 1998], p.436
A Reaction
This summarises the views of Descartes, Leibniz and Malebranche. Kant is not committing himself to dualism here. He didn't think of epiphenomenalism, or property dualism. And the 'community' could just be a coincidence…