What are the mind-body relationship theories in psychology? Thanks!

The question of the mind-body relationship is arguably one of the fundamental questions of psychology (as are others such as the question of heredity and environment, the question of the sources of knowledge, the question of free will and determinism, etc.), and the answers to these questions often go beyond the level of science to the level of philosophical epistemology.

Generally and simply various views of the mind-body relationship can be characterized: monism and dualism. Monism can be divided into materialism (mental activity is physiological activity) and idealism (physiological activity is mental activity); dualism can be divided into physical and mental parallelism (physiology and psychology are two processes that are not related to each other) and physical and mental sympathetic theory (physiology and psychology are two processes that interact with each other)

Detailed you go to Descartes' book. The question is more philosophical.